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• CodePlex Daily Summary for Wednesday, January 26, 2011

  CodePlex Daily Summary for Wednesday, January 26, 2011Popular ReleasesCatel - WPF and Silverlight MVVM library: 1.1: (+) Styles can now be changed dynamically, see Examples application for a how-to (+) ViewModelBase class now have a constructor that allows services injection (+) ViewModelBase services can now be configured by IoC (via Microsoft.Unity) (+) All ViewModelBase services now have a unit test implementation (+) Added IProcessService to run processes from a viewmodel with directly using the process class (which makes it easier to unit test view models) (*) If the HasErrors property of DataObjec...NodeXL: Network Overview, Discovery and Exploration for Excel: NodeXL Excel Template, version 1.0.1.160: The NodeXL Excel template displays a network graph using edge and vertex lists stored in an Excel 2007 or Excel 2010 workbook. What's NewThis release improves NodeXL's Twitter and Pajek features. See the Complete NodeXL Release History for details. Installation StepsFollow these steps to install and use the template: Download the Zip file. Unzip it into any folder. Use WinZip or a similar program, or just right-click the Zip file in Windows Explorer and select "Extract All." Close Ex...MVC Foolproof Validation: Beta 0.9.4042: Fixed a few bugs and added ASP.NET MVC 3 support (Including Unobtrusive JavaScript support).Kooboo CMS: Kooboo CMS 3.0 CTP: Files in this downloadkooboo_CMS.zip: The kooboo application files Content_DBProvider.zip: Additional content database implementation of MSSQL, RavenDB and SQLCE. Default is XML based database. To use them, copy the related dlls into web root bin folder and remove old content provider dlls. Content provider has the name like "Kooboo.CMS.Content.Persistence.SQLServer.dll" View_Engines.zip: Supports of Razor, webform and NVelocity view engine. Copy the dlls into web root bin folder to enable...UOB & ME: UOB ME 2.6: UOB ME 2.6????: ???? V1.0: ???? V1.0 ??Developer Guidance - Onboarding Windows Phone 7: Fuel Tracker Source: Release NotesThis project is almost complete. We'll be making small updates to the code and documentation over the next week or so. We look forward to your feedback. This documentation and accompanying sample application will get you started creating a complete application for Windows Phone 7. You will learn about common developer issues in the context of a simple fuel-tracking application named Fuel Tracker. Some of the tasks that you will learn include the following: Creating a UI that...Password Generator: 2.2: Parallel password generation Password strength calculation ( Same method used by Microsoft here : https://www.microsoft.com/protect/fraud/passwords/checker.aspx ) Minor code refactoringVisual Studio 2010 Architecture Tooling Guidance: Spanish - Architecture Guidance: Francisco Fagas http://geeks.ms/blogs/ffagas, Microsoft Most Valuable Professional (MVP), localized the Visual Studio 2010 Quick Reference Guidance for the Spanish communities, based on http://vsarchitectureguide.codeplex.com/releases/view/47828. Release Notes The guidance is available in a xps-only (default) or complete package. The complete package contains the files in xps, pdf and Office 2007 formats. 2011-01-24 Publish version 1.0 of the Spanish localized bits.ASP.NET MVC Project Awesome, jQuery Ajax helpers (controls): 1.6.2: A rich set of helpers (controls) that you can use to build highly responsive and interactive Ajax-enabled Web applications. These helpers include Autocomplete, AjaxDropdown, Lookup, Confirm Dialog, Popup Form, Popup and Pager the html generation has been optimized, the html page size is much smaller nowFacebook Graph Toolkit: Facebook Graph Toolkit 0.6: new Facebook Graph objects: Application, Page, Post, Comment Improved Intellisense documentation new Graph Api connections: albums, photos, posts, feed, home, friends JSON Toolkit upgraded to version 0.9 (beta release) with bug fixes and new features bug fixed: error when handling empty JSON arrays bug fixed: error when handling JSON array with square or large brackets in the message bug fixed: error when handling JSON obejcts with double quotation in the message bug fixed: erro...Microsoft All-In-One Code Framework: Visual Studio 2008 Code Samples 2011-01-23: Code samples for Visual Studio 2008BloodSim: BloodSim - 1.4.0.0: This version requires an update for WControls.dll. - Removed option to use Old Rune Strike - Fixed an issue that was causing Ratings to not properly update when running Progressive simulations - Ability data is now loaded from an XML file in the BloodSim directory that is user editable. This data will be reloaded each time a fresh simulation is run. - Added toggle for showing Graph window. When unchecked, output data will instead be saved to a text file in the BloodSim directory based on the...MVVM Light Toolkit: MVVM Light Toolkit V3 SP1 (3): Instructions for installation: http://www.galasoft.ch/mvvm/installing/manually/ Includes the hotfix templates for Windows Phone 7 development. This is only relevant if you didn't already install the hotfix described at http://blog.galasoft.ch/archive/2010/07/22/mvvm-light-hotfix-for-windows-phone-7-developer-tools-beta.aspx.Community Forums NNTP bridge: Community Forums NNTP Bridge V42: Release of the Community Forums NNTP Bridge to access the social and anwsers MS forums with a single, open source NNTP bridge. This release has added some features / bugfixes: Bugfix: Decoding of Subject now also supports multi-line subjects (occurs only if you have very long subjects with non-ASCII characters)Minecraft Tools: Minecraft Topographical Survey 1.3: MTS requires version 4 of the .NET Framework - you must download it from Microsoft if you have not previously installed it. This version of MTS adds automatic block list updates, so MTS will recognize blocks added in game updates properly rather than drawing them in bright pink. New in this version of MTS: Support for all new blocks added since the Halloween update Auto-update of blockcolors.xml to support future game updates A splash screen that shows while the program searches for upd...StyleCop for ReSharper: StyleCop for ReSharper 5.1.14996.000: New Features: ============= This release is just compiled against the latest release of JetBrains ReSharper 5.1.1766.4 Previous release: A considerable amount of work has gone into this release: Huge focus on performance around the violation scanning subsystem: - caching added to reduce IO operations around reading and merging of settings files - caching added to reduce creation of expensive objects Users should notice condsiderable perf boost and a decrease in memory usage. Bug Fixes...MediaScout: MediaScout 3.0 Preview 4: Update ReleaseMFCMAPI: January 2011 Release: Build: 6.0.0.1024 Full release notes at SGriffin's blog. If you just want to run the tool, get the executable. If you want to debug it, get the symbol file and the source. The 64 bit build will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit build, regardless of the operating system. Facebook BadgeAutoLoL: AutoLoL v1.5.4: Added champion: Renekton Removed automatic file association Fix: The recent files combobox didn't always open a file when an item was selected Fix: Removing a recently opened file caused an errorNew Projects? ! :): AskAnswerDone (? ! :)) is a free and open source Q&A platform. Your user choses a problem they're having (like "ERROR: 123" or "THE PICTURES DONT SHOW"), choses something about the program that they can help with, and gets their answer while helping someone else. Chat by Mibbit.BusinessControl2: BusinessControl project. v. 2Citizen Journalism Network Server: An educational project that will hopefully one day prove useful. Initially a simple ASP.NET MVC 3 implementation of the Atom Publishing Protocol, and later have features for federated servers, geolocation, advanced searching, and ratings.ciws-distr: CIWS distrContentFinder: Help user to find the content in every file in your folder.ContentFinder Support Regex Search and the UI will not freeze any more.CSC446: database driven website done with silverlightElos: Projeto ElosEnhanced Host File Manager: Enhanced Host File Editor / Manager Intended for web development (developers or designers) to switch between development and live easily, hassle free. Full access to the host file is required. It is assumed that host file is at default location: C:\Windows\System32\drivers\etcHelloWorld: As a sample center, HelloWorld sketches the skeletons of most Microsoft development techniques. Each sample is elaborately selected, composed, and documented to demonstrate one frequently-asked/tested/used scenario based on my experience as a support engineer. InkSpot: Adds SVG runtime support to WPF applications.ITaCS Change Password web part: This web part allows users to change their local or Active Directory password from within a MOSS or WSS Site.JoscalSoftware: At JoscalSoftware you can find programs designed (mostly) in Visual Basic 2010 Express. Most programs are to do with text editors, and webbrowsers.K.Frame: A open .net structual for enterprice application with MVC,iBatis.Net,WCF,etc.LogExpert: Windows tail program and log file analyzer.MasterGuitarReader: This project is a free guitar tab readerOpalis Scheduled Tasks Integration Pack: A Opalis integration pack for manipulating scheduled tasks on windows systems.OpenInsure: OpenInsure is an OpenSource Insurance Agent automation system. It is being developed using the .Net 4.0 frame work and is using a SQL 2008 backend. Orchard Hyperlink Custom Field: The Hyperlink module introduces a new field to store hyperlinks as custom types. Includes URL, label, title, and target. It's developed in C# as a plugin to the Orchard CMS project.Orchard Stars: A simple five-star rating Orchard module.PerformancePoint 2010 Content Deployment Tool: The PerformancePoint 2010 Content Deployment Tool is a command-line tool that allows you to deploy PerformancePoint content using an existing ddwx file and can be used to migrate content from development to production or between site collections on the same SharePoint server.Plat Manager / Real Estate management application: The administration module is meant to manage 3 web clients with their real estate databases. The main feature is ability to automatically generate the interface of the module based on the information pulled from the database. PHP, MySQL, MVC Kohana, Doctrene ORM, Ajax, ExtJSSalesManager: SalesManagerSercury: ????????，????WCF??????????????。SGPF: The team does not have nothing to declare here!Sitefinity Social Widgets Contrib: Sitefinity Social Widget Contrib makes it easier for GiveCamp Charities and other Sitefinity users to pull their social feeds into your site. You'll no longer have to build one off controls. It's developed in a combination of C# and JQuery.StackHash Plugin SDK & Sample Plugins (for WinQual / Windows Error Reporting): Plugin SDK and sample command line, email and FogBugz plugins for StackHash. StackHash is a tool that helps developers access crash reports from Microsoft's WinQual service (Windows Error Reporting). The SDK is designed to support synchronizing StackHash data with bug trackers.TIC: ticTwedge: Twedge is a customizable Silverlight-based Twitter badge, showing the latst tweets, based on your specific search term.Web Scripting and Content Creation Code Samples: Sample code used in the Web Scripting and Content Creation course at the University of HertfordshirewebSurfer - a test tool: Windows Workflow Foundation, WWF, test web pagesWLCompus: WLCompusYellow Rice: Yellow RiceZDStar Enterprise Framework: ZDStar Enterprise Framework for Small & Medium Size Enterprises.

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• Threading extra state through a parser in Scala

  - by Travis Brown

  I'll give you the tl;dr up front I'm trying to use the state monad transformer in Scalaz 7 to thread extra state through a parser, and I'm having trouble doing anything useful without writing a lot of t m a -> t m b versions of m a -> m b methods. An example parsing problem Suppose I have a string containing nested parentheses with digits inside them: val input = "((617)((0)(32)))" I also have a stream of fresh variable names (characters, in this case): val names = Stream('a' to 'z': _*) I want to pull a name off the top of the stream and assign it to each parenthetical expression as I parse it, and then map that name to a string representing the contents of the parentheses, with the nested parenthetical expressions (if any) replaced by their names. To make this more concrete, here's what I'd want the output to look like for the example input above: val target = Map( 'a' -> "617", 'b' -> "0", 'c' -> "32", 'd' -> "bc", 'e' -> "ad" ) There may be either a string of digits or arbitrarily many sub-expressions at a given level, but these two kinds of content won't be mixed in a single parenthetical expression. To keep things simple, we'll assume that the stream of names will never contain either duplicates or digits, and that it will always contain enough names for our input. Using parser combinators with a bit of mutable state The example above is a slightly simplified version of the parsing problem in this Stack Overflow question. I answered that question with a solution that looked roughly like this: import scala.util.parsing.combinator._ class ParenParser(names: Iterator[Char]) extends RegexParsers { def paren: Parser[List[(Char, String)]] = "(" ~> contents <~ ")" ^^ { case (s, m) => (names.next -> s) :: m } def contents: Parser[(String, List[(Char, String)])] = "\\d+".r ^^ (_ -> Nil) | rep1(paren) ^^ ( ps => ps.map(_.head._1).mkString -> ps.flatten ) def parse(s: String) = parseAll(paren, s).map(_.toMap) } It's not too bad, but I'd prefer to avoid the mutable state. What I want Haskell's Parsec library makes adding user state to a parser trivially easy: import Control.Applicative ((*>), (<$>), (<*)) import Data.Map (fromList) import Text.Parsec paren = do (s, m) <- char '(' *> contents <* char ')' h : t <- getState putState t return $ (h, s) : m where contents = flip (,) [] <$> many1 digit <|> (\ps -> (map (fst . head) ps, concat ps)) <$> many1 paren main = print $ runParser (fromList <$> paren) ['a'..'z'] "example" "((617)((0)(32)))" This is a fairly straightforward translation of my Scala parser above, but without mutable state. What I've tried I'm trying to get as close to the Parsec solution as I can using Scalaz's state monad transformer, so instead of Parser[A] I'm working with StateT[Parser, Stream[Char], A]. I have a "solution" that allows me to write the following: import scala.util.parsing.combinator._ import scalaz._, Scalaz._ object ParenParser extends ExtraStateParsers[Stream[Char]] with RegexParsers { protected implicit def monadInstance = parserMonad(this) def paren: ESP[List[(Char, String)]] = (lift("(" ) ~> contents <~ lift(")")).flatMap { case (s, m) => get.flatMap( names => put(names.tail).map(_ => (names.head -> s) :: m) ) } def contents: ESP[(String, List[(Char, String)])] = lift("\\d+".r ^^ (_ -> Nil)) | rep1(paren).map( ps => ps.map(_.head._1).mkString -> ps.flatten ) def parse(s: String, names: Stream[Char]) = parseAll(paren.eval(names), s).map(_.toMap) } This works, and it's not that much less concise than either the mutable state version or the Parsec version. But my ExtraStateParsers is ugly as sin—I don't want to try your patience more than I already have, so I won't include it here (although here's a link, if you really want it). I've had to write new versions of every Parser and Parsers method I use above for my ExtraStateParsers and ESP types (rep1, ~>, <~, and |, in case you're counting). If I had needed to use other combinators, I'd have had to write new state transformer-level versions of them as well. Is there a cleaner way to do this? I'd love to see an example of a Scalaz 7's state monad transformer being used to thread state through a parser, but Scala 6 or Haskell examples would also be useful.

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• CodePlex Daily Summary for Tuesday, March 15, 2011

  CodePlex Daily Summary for Tuesday, March 15, 2011Popular ReleasesPhalanger - The PHP Language Compiler for the .NET Framework: 2.0 (March 2011): Phalanger 2.0 (March 2011) Release with Visual Studio 2008 integration. You can install additional managed MySQL extension to improve the performance of your application.Kooboo CMS: Kooboo 3.0 RC: Bug fixes Inline editing toolbar positioning for websites with complicate CSS. Inline editing is turned on by default now for the samplesite template. MongoDB version content query for multiple filters. . Add a new 404 page to guide users to login and create first website. Naming validation for page name and datarule name. Files in this download kooboo_CMS.zip: The Kooboo application files Content_DBProvider.zip: Additional content database implementation of MSSQL,SQLCE, RavenDB ...SQL Monitor - tracking sql server activities: SQL Monitor 3.2: 1. introduce sql color syntax highlighting with http://www.codeproject.com/KB/edit/FastColoredTextBox_.aspxUmbraco CMS: Umbraco 4.7.0: Service release fixing 50+ issues! Getting Started A great place to start is with our Getting Started Guide: Getting Started Guide: http://umbraco.codeplex.com/Project/Download/FileDownload.aspx?DownloadId=197051 Make sure to check the free foundation videos on how to get started building Umbraco sites. They're available from: Introduction for webmasters: http://umbraco.tv/help-and-support/video-tutorials/getting-started Understand the Umbraco concepts: http://umbraco.tv/help-and-support...Facebook C# SDK: 5.0.5 (BETA): This is sixth BETA release of the version 5 branch of the Facebook C# SDK. Remember this is a BETA build. Some things may change or not work exactly as planned. We are absolutely looking for feedback on this release to help us improve the final 5.X.X release. New in this release: Version 5.0.5 is almost completely backward compatible with 4.2.1 and 5.0.3 (BETA) Bug fixes and helpers to simplify many common scenarios Fixed a last minute issue in version 5.0.4 in Facebook.Web For more inf...ProDinner - ASP.NET MVC EF4 Code First DDD jQuery Sample App: first release: ProDinner is an ASP.NET MVC sample application, it uses DDD, EF4 Code First for Data Access, jQuery and MvcProjectAwesome for Web UI, it has Multi-language User Interface Features: CRUD and search operations for entities Multi-Language User Interface upload and crop Images (make thumbnail) for meals pagination using "more results" button very rich and responsive UI (using Mvc Project Awesome) Multiple UI themes (using jQuery UI themes)BEPUphysics: BEPUphysics v0.15.0: BEPUphysics v0.15.0!LiveChat Starter Kit: LCSK v1.1: This release contains couple of new features and bug fixes including: Features: Send chat transcript via email Operator can now invite visitor to chat (pro-active chat request) Bug Fixes: Operator management (Save and Delete) bug fixes Operator Console chat small fixesIronRuby: 1.1.3: IronRuby 1.1.3 is a servicing release that keeps on improving compatibility with Ruby 1.9.2 and includes IronRuby integration to Visual Studio 2010. We decided to drop 1.8.6 compatibility mode in all post-1.0 releases. We recommend using IronRuby 1.0 if you need 1.8.6 compatibility. The main purpose of this release is to sync with IronPython 2.7 release, i.e. to keep the Dynamic Language Runtime that both these languages build on top shareable. This release also fixes a few bugs: 5763 Use...SQL Server PowerShell Extensions: 2.3.2.1 Production: Release 2.3.2.1 implements SQLPSX as PowersShell version 2.0 modules. SQLPSX consists of 13 modules with 163 advanced functions, 2 cmdlets and 7 scripts for working with ADO.NET, SMO, Agent, RMO, SSIS, SQL script files, PBM, Performance Counters, SQLProfiler, Oracle and MySQL and using Powershell ISE as a SQL and Oracle query tool. In addition optional backend databases and SQL Server Reporting Services 2008 reports are provided with SQLServer and PBM modules. See readme file for details.IronPython: 2.7: On behalf of the IronPython team, I'm very pleased to announce the release of IronPython 2.7. This release contains all of the language features of Python 2.7, as well as several previously missing modules and numerous bug fixes. IronPython 2.7 also includes built-in Visual Studio support through IronPython Tools for Visual Studio. IronPython 2.7 requires .NET 4.0 or Silverlight 4. To download IronPython 2.7, visit http://ironpython.codeplex.com/releases/view/54498. Any bugs should be report...XML Explorer: XML Explorer 4.0.2: Changes in 4.0: This release is built on the Microsoft .NET Framework 4 Client Profile. Changed XSD validation to use the schema specified by the XML documents. Added a VS style Error List, double-clicking an error takes you to the offending node. XPathNavigator schema validation finally gives SourceObject (was fixed in .NET 4). Added Namespaces window and better support for XPath expressions in documents with a default namespace. Added ExpandAll and CollapseAll toolbar buttons (in a...Mobile Device Detection and Redirection: 1.0.0.0: Stable Release 51 Degrees.mobi Foundation has been in beta for some time now and has been used on thousands of websites worldwide. We’re now highly confident in the product and have designated this release as stable. We recommend all users update to this version. New Capabilities MappingsTo improve compatibility with other libraries some new .NET capabilities are now populated with wurfl data: “maximumRenderedPageSize” populated with “max_deck_size” “rendersBreaksAfterWmlAnchor” populated ...ASP.NET MVC Project Awesome, jQuery Ajax helpers (controls): 1.7.3: A rich set of helpers (controls) that you can use to build highly responsive and interactive Ajax-enabled Web applications. These helpers include Autocomplete, AjaxDropdown, Lookup, Confirm Dialog, Popup Form, Popup and Pager added interactive search for the lookupWPF Inspector: WPF Inspector 0.9.7: New Features in Version 0.9.7 - Support for .NET 3.5 and 4.0 - Multi-inspection of the same process - Property-Filtering for multiple keywords e.g. "Height Width" - Smart Element Selection - Select Controls by clicking CTRL, - Select Template-Parts by clicking CTRL+SHIFT - Possibility to hide the element adorner (over the context menu on the visual tree) - Many bugfixes??????????: All-In-One Code Framework ??? 2011-03-10: http://download.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=1codechs&DownloadId=216140 ??，????。??????????All-In-One Code Framework ???，??20?Sample！！????，?????。http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=1code&DownloadId=128165 ASP.NET ??： CSASPNETBingMaps VBASPNETRemoteUploadAndDownload CS/VBASPNETSerializeJsonString CSASPNETIPtoLocation CSASPNETExcelLikeGridView ....... Winform??： FTPDownload FTPUpload MultiThreadedWebDownloader...Rawr: Rawr 4.1.0: Rawr is now web-based. The link to use Rawr4 is: http://elitistjerks.com/rawr.phpThis is the Cataclysm Release. More details can be found at the following link http://rawr.codeplex.com/Thread/View.aspx?ThreadId=237262 As of the 4.0.16 release, you can now also begin using the new Downloadable WPF version of Rawr!This is a Release of the WPF version, most of the general issues have been resolved. If you have a problem, please follow the Posting Guidelines and put it into the Issue Tracker. Whe...PHP Manager for IIS: PHP Manager 1.1.2 for IIS 7: This is a localization release of PHP Manager for IIS 7. It contains all the functionality available in 56962 plus a few bug fixes (see change list for more details). Most importantly this release is translated into five languages: German - the translation is provided by Christian Graefe Dutch - the translation is provided by Harrie Verveer Turkish - the translation is provided by Yusuf Oztürk Japanese - the translation is provided by Kenichi Wakasa Russian - the translation is provid...myCollections: Version 1.3: New in version 1.3 : Added Editor management for Books Added Amazon API for Books Us, Fr, De Added Amazon Us, Fr, De for Movies Added The MovieDB for Fr and De Added Author for Books Added Editor and Platform for Games Added Amazon Us, De for Games Added Studio for XXX Added Background for XXX Bug fixing with Softonic API Bug fixing with IMDB UI improvement Removed GraceNote Added Amazon Us,Fr, De for Series Added TVDB Fr and De for Series Added Tracks for Musi...patterns & practices : Composite Services: Composite Services Guidance - CTP2: Overview The Composite Services guidance (codename Reykjavik) provides best practices and capabilities for applying industry-known SOA design patterns when building robust, connected, service-oriented composite enterprise applications. These capabilities are implemented as a set of reusable components for analytic tracing, service virtualization, metadata centralization and versioning, and policy centralization as well as exception management, included in this release. Changes in this CTP ...New ProjectsAlice：????????????demo: ???????????????，????????????，????????????????????demo。??cnblogs????????：http://www.cnblogs.com/xuqiang/android-maps: maps trackbeginner: beginnerBing Maps Android SDK: The Bing Maps Android SDK is a base project that can be used to help developers create mapping applications using Microsoft's Bing Maps. This is written in Java and built using the Bing Maps AJAX v7 control.Brokenhouse WPF Control Suite: The Brokenhouse Control Suite is library that provides a rich set of controls for the Windows Presentation Foundation (WPF). It provides a full featured transition control as well as WPF replacements for the standard windows Wizards and Task dialogs. Call Centre Management: This is project Q5Captcha Control: Captcha Control (C#) allows users to add a captcha to an asp.net page. The control supports declarative settings of fontsize, font family, color, captcha length, background image, character set, success, error and buttons' text. Supports audio - reading out the captcha text.CMC7 Validator: Componente para validação de códigos CMC7CRM 2011 Jscript Soap Request Formatter: Works in conjunction to soaplogger solution included in CRM 2011 SDK to format captured envelopes in Jscript, ready for use in the CRM GUI. Eventually I would like to combine the Soap Logger functionality entirely.Cross Platform Wireless Communication: This is a cross platform bluetooth communications project.CxCarbon: Business Applicationecommerce project: E-Commerces ProjectFamsWCF: final projectFitCalc: Fitnes calculator. Some math about fitnessFuturisticsPro: project Case Study 3 : Call Centre managementGame Sprite Generator: Allows to control sprite transformation in a GUI and export code to XNA.HeartLand Home FinanceQT5: Hello!HospitalManager: project q5InfoPathFilesGrabber: This tool will help you to extract InfoPath files which can be saved to local disk or to a SharePoint list item. Take a look at the project InfoPathFileDecoder in this solution. Soon I am going to clean up the code and provide some test files.iOS Movie list viewer: Movies application has several use cases which covers different functionalities, like listing popular movies or searching by keyword. The information about movies should be retrieved from http://www.themoviedb.org/ which has publically exposed API http://api.themoviedb.org/2.1/. Model XML Importer And Exporter: Contains a XML specification of a 3D model that handles animation, cameras, light, bones, and models. Also contains a Importer for C++ and C# and the C++ 3DS exporterNIIT Sample Music Store: This project is very useful.Orchard Module - Bing Map Lists: An Orchard CMS module to display more than one place on a Bing Map. This module would be great for creating a guide to an area displaying all the different points of interest.Ovvio: OvvioPigmalión: Todo lo desees puede hacerce realidad.... solo programalo.. :PPrism MVVMP Stub and Sample: This project contains a sample application demonstrating the Model View ViewModel Presenter (MVVMP) Pattern. It also contains a stub that can be used to rapidly build an MVVMP based application using Prism.ProDinner - ASP.NET MVC EF4 Code First DDD jQuery Sample App: ProDinner is an ASP.NET MVC sample application, it uses DDD, EF4 Code First for Data Access, jQuery and MvcProjectAwesome for Web UI, it has Multi-language User InterfaceProjectQ5_V2: ProjectQ5Public Key Infrastructure PowerShell module: This module is intended to simplify certain PKI management tasks by using automation with Windows PowerShell.Qmiks Digital Media Module for Orchard CSM: Qmiks - Digital Media is a Orchad CMS module which allows a user to include digital content: audio, video, images into Orchard based web site. QuickSearch Pro: This Is ProQ4-M2. Case Study 1: QuickSearchSALT: Sistema Criado para acompanhamento de licitaçõesshahnawazwsccemb: web scripting and content creationShuttle Wiki: Shuttle Wiki uses Asp.NET MVC Razor along with JQuery and Sql ServerSoftware Render: Full Software Render developed in C# and XNA using the Ploobs Engine ( http://ploobsengine.codeplex.com ). Mimic the stages of Directx 11 pipeline in software, including Vertex, Geometric,Pixel, Hull and Domain Shader programable in C#. Uses Barycentric triangle rasterization.Starter CRM Solution for SharePoint 2010: To design and build a SPF2010 template to provision basic CRM functionality for the small business owner. Core CRM Entities will be based on OOB Custom Lists (with Forms customized with SP Designer) while more elaborate features will be built using C# & VS2010. Stock# Connectors: ?????????? ? ????????? ???????? ?????????? ??? S#( http://stocksharp.com/ ). ?? ?????? ?????? ??????????????? ????????? ??? Transaq.tdryan Code Samples & Repository: This resource page serves as my file repository for code samples that I share with others.UCB_GP_A: this is a pilot project which is intented to help the college education. .VB DB - Visual Basic Database: A brand new totally Visual Basic append only object database engine. Way2Sms Applications for Android, Desktop/Laptop & Java enabled phones: Apps that allow sending free sms all over India using Way2Sms. No irritating ads are shown. Message sending is really fast and simple compared to the website. Following clients are supported - 1. Android 2. Desktop/Laptop - Mac/Windows/Linux 3. Java enabled phoneXmlAsRelationalTvf: TSQL CLR table-valued-function to read XML as relational data. Including a sample that reads wikipedia-dumps and return as relational record set.

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• CodePlex Daily Summary for Tuesday, May 13, 2014

  CodePlex Daily Summary for Tuesday, May 13, 2014Popular ReleasesWinAudit: WinAudit Freeware v3.0: WinAudit.exe v3.0 MD5: 88750CCF49FF7418199B2645755830FA Known Issues: 1. Report creation can be very slow when right-to-left (Hebrew) characters are present. 2. Emsisoft Anti-Malware may stop and/or quarantine WinAudit. This happens when WinAudit attempts to obtain a list if running programmes. You will need to set an exception rule in Emsisoft to allow WinAudit to run.MVCwCMS - ASP.NET MVC CMS: MVCwCMS 2.2.2: Updated CKFinder config. For the installation instructions visit the documentation page: https://mvcwcms.codeplex.com/documentationTerraMap (Terraria World Map Viewer): TerraMap 1.0.4: Added support for the new Terraria v1.2.4 update. New items, walls, and tiles Fixed Issue 35206: Hightlight/Find doesn't work for Demon Altars Fixed finding Demon Hearts/Shadow Orbs Added ability to find Enchanted Swords (in the stone) and Water Bolt books Fixed installer not uninstalling older versions The setup file will make sure .NET 4 is installed, install TerraMap, create desktop and start menu shortcuts, add a .wld file association, and launch TerraMap. If you prefer the zip ...WPF Localization Extension: v2.2.1: Issue #9277 Issue #9292 Issue #9311 Issue #9312 Issue #9313 Issue #9314CtrlAltStudio Viewer: CtrlAltStudio Viewer 1.2.1.41167 Release: This release of the CtrlAltStudio Viewer includes the following significant features: Oculus Rift support. Stereoscopic 3D display support. Variable walking / flying speed. Xbox 360 Controller support. Kinect for Windows support. Based on Firestorm viewer 4.6.5 codebase. For more details, see the release notes linked to below. Release notes: http://ctrlaltstudio.com/viewer/release-notes/1-2-1-41167-release Support info: http://ctrlaltstudio.com/viewer/support Privacy policy: http:/...ExtJS based ASP.NET Controls: FineUI v4.0.6: FineUI（???） ?? ExtJS ??? ASP.NET ??? FineUI??? ?? No JavaScript，No CSS，No UpdatePanel，No ViewState，No WebServices ??????? ?????? IE 8.0+、Chrome、Firefox、Opera、Safari ???? Apache License v2.0 ?：ExtJS ?? GPL v3 ?????(http://www.sencha.com/license) ???? ??：http://fineui.com/ ??：http://fineui.com/bbs/ ??：http://fineui.com/demo/ ??：http://fineui.com/doc/ ??：http://fineui.codeplex.com/ FineUI ???? ExtJS ????????，???? ExtJS ?，?????： 1. ????? FineUI ? ExtJS ? http://fineui.com/bbs/forum.ph...Office App Model Samples: Office App Model Samples v2.0: Office App Model Samples v2.0GMare: GMare Beta 1.1: Features Added: Overhauled interface Re-wrote most controls and forms Automatic room creation on application open Room properties bar to change various room properties Now able to use a background from a supported Game Maker project file Block instances implemented More instance editing features like multi-Select, cherry pick select, replace, and set position More instance options on the instance list Flexible XML based .gmpx human readable project file format Game...Readable Passphrase Generator: KeePass Plugin 0.13.0: Version 0.13.0 Added "mutators" which add uppercase and numbers to passphrases (to help complying with upper, lower, number complexity rules). Additional API methods which help consuming the generator from 3rd party c# projects. 13,160 words in the default dictionary (~600 more than previous release).CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.25.0: Release v1.0.25.0 MemberInfo/MethodInfo popup is now positioned properly to fit the screen In MethodInfo popup method signatures are word-wrapped Implemented Debug text value visualizer Pining sub-values from Watch PanelxFunc: xFunc 2.15.3: Added #53R.NET: R.NET 1.5.12: R.NET 1.5.12 is a beta release towards R.NET 1.6. You are encouraged to use 1.5.12 now and give feedback. See the documentation for setup and usage instructions. Main changes for R.NET 1.5.12: The C stack limit was not disabled on Windows. For reasons possibly peculiar to R, this means that non-concurrent access to R from multiple threads was not stable. This is now fixed, with the fix validated with a unit test. Thanks to Odugen, skyguy94, and previously others (evolvedmicrobe, tomasp) fo...CTI Text Encryption: CTI Text Encryption 5.2: Change log: 5.2 - Remove Cut button. - Fixed Reset All button does not reset encrypted text column. - Switch button location between Copy and Paste. - Enable users to use local fonts to display characters of their language correctly. (A font settings file will be saved at the same folder of this program.) 5.1 - Improve encryption process. - Minor UI update. - Version 5.1 is not compatible with older version. 5.0 - Improve encryption algorithm. - Simply inner non-encryption related mec...SEToolbox: SEToolbox 01.029.006 Release 1: Fix to allow keyboard search on load dialog. (type the first few letters of your save) Fixed check for new release. Changed the way ship details are loaded to alleviate load time for worlds with very large ships (100,000+ blocks). Fixed Image importer, was incorrectly listing 'Asteroid' as import option. Minor changes to menus (text and appearance) for clarity and OS consistency. Added in reading of world palette for color dialog editor. WIP on subsystem editor. Can now multiselec...Media Companion: Media Companion MC3.597b: Thank you for being patient, againThere are a number of fixes in place with this release. and some new features added. Most are self explanatory, so check out the options in Preferences. Couple of new Features:* Movie - Allow save Title and Sort Title in Title Case format. * Movie - Allow save fanart.jpg if movie in folder. * TV - display episode source. Get episode source from episode filename. Fixed:* Movie - Added Fill Tags from plot keywords to Batch Rescraper. * Movie - Fixed TMDB s...SimCityPak: SimCityPak 0.3.0.0: Contains several bugfixes, newly identified properties and some UI improvements. Main new features UI overhaul for the main index list: Icons for each different index, including icons for different property files Tooltips for all relevant fields Removed clutter Identified hundreds of additional properties (thanks to MaxisGuillaume) - this should make modding gameplay easierMagick.NET: Magick.NET 6.8.9.002: Magick.NET linked with ImageMagick 6.8.9.0.VidCoder: 1.5.22 Beta: Added ability to burn SRT subtitles. Updated to HandBrake SVN 6169. Added checks to prevent VidCoder from running with a database version newer than it expects. Tooltips in the Advanced Video panel now trigger on the field labels as well as the fields themselves. Fixed updating preset/profile/tune/level settings on changing video encoder. This should resolve some problems with QSV encoding. Fixed tunes and profiles getting set to blank when switching between x264 and x265. Fixed co...Tiny Deduplicator: Tiny Deduplicator 1.0.0.1: Project Description Tiny Deduplicator is a file deduplicator which can scan for duplicate files, and allows the user to control which duplicates they are going to keep, and which are going to be recycled. Tiny Deduplicator will never delete files directly-- rather, it sends them to the recycle bin for you to confirm the deletion of. In its current form, Tiny Deduplicator is a mere 23KB (including the GUI); however, it has the following features: Easily browse and select which directory to ...NuGet: NuGet 2.8.2: We will be releasing a 2.8.2 version of our own NuGet packages and the NuGet.exe command-line tool. The 2.8.2 release will not include updated VS or WebMatrix extensions. NuGet.Server.Extensions.dll needs to be used alongside NuGet-Signed.exe to provide the NuGet.exe mirror functionality.New Projects2112110004: bùi th? bé di?m2112110007: l?p trình hu?ng d?i tu?ng (OOP) Ph?m H?u Dung2112110019: Nguy?n Duy Hòa_2112110019 CCQ1211A2112110032: Truong Ha Mi2112110041: nguyen manh thuong quan2112110079: VU TH? MAI ANH - L?P TRÌNH HU?NG Ð?I TU?NG(OOP) - L?P CCQ1211B - MSSV 2112110079Adapter Pattern: Super duper simple project that explains how the Adapter Design Pattern works.Aspose for Sitefinity: Aspose Sitefinity Content Export Add-on allow users to export online content into Microsoft Word or Adobe Acrobat PDF document using Aspose.Words.baitapHDT: le ba thuan thanhCaltech Software: Caltech SoftwareDCM Ventas: DCMEntityBinder: Entity Binder is a C# library to help you to read data from xml or json file and bind them directly to data object.FATCAClient: A simple application for populating and viewing XML files which comply with the published FATCA schema.Grade Calculator For BTEC First Diploma in IT level 2: Grade Calculator For BTEC First Diploma in IT level 2HMS_TEST: ????? ???? ??????.lock Keywords Demo: ?? lock ????????，????? this、string、typeof(MyType) ?????mbtPdfAsm: command line pdf file assembler/merger.Orchard CMS Syndication: Implementation of a module that provides OData protocol and then enables third parties to query (custom) creatable content types embedded in an Orchard CMS SitePerfAnalyzer: TemporaryPluralSight Downloader: This project allow to Download PluralSight (PluralSight downloader) video tutorials even with free account and many more features. Use at your own risk.ProView: Image viewer and data entry application for renaming image files.Real Estate website Clark: Real Estate website ClarkSE Community Modding API: This project aims to simplify the modding process of Space Engineers® game from Keen Software HouseSirGorn robi PeHaPa: Projekt na prace zespolowa.TPC1 Grupo14: TPC1Grupo14TypeScriptSheet (Spreadsheet webapp create using TypeScript): TypeScriptSheet. This project is Spread sheet Web Application. It is medium featured spread sheet built using TypeScript and JQuery.VB Converter: Convert your VB6 code to .NET (C# and VB .NET) with this tool.Web Site For Instagram: This is a web app for Instagram using asp.net MVC.WorkProject: This is WorkProject.Z Entity Framework Extensions: ab??????-??????【??】??????????: ??????,?????????,?????????????。?????????????,?????????,???????。 ??????-??????【??】??????????: ??????????????????????????,???????????????,????????????????！ ??????-??????【??】??????????: ??????????????????,???????、????、????、??????、???????,??????,???????????。 ????-????【??】????????: ??????????????,???????、???????????,????????,????,?????????,??????,??????! ????-????【??】????????: ???????????????"????,????"???,????????????????????????,??????????????。 ??????-??????【??】??????????: ????????????,????,??????????? ???? ???? ?????????,???,??,?????! ??????-??????【??】??????????: ???????????? ???? ???? ???? ???? ???? ??????? ?????，????????????????. ????-????【??】????????: ??????????????、????、????、??????、????、????????,????????、?????????,?????。 ?????-?????【??】?????????: ??????????????????????????,???????????????????????,???????。 ?????-?????【??】?????????: ??????????????:?????? ???? ??????,???????,??????,???????。 ??????-??????【??】??????????: ?????????????????,???????????????。?????????????,???????,?????????。 ??????-??????【??】??????????: ????????????????????,?????????????,???????????.????????????,????????????! ????-????【??】????????: ????????????:????,????,????,???????,????????,??????:????????,?????! ?????-?????【??】?????????: ?????????????????,??:??????,????,????,????,?????,??????????????. ?????-?????【??】?????????: ??????,??,????????。 ... ??????????????????、??????????????????... ??????-??????【??】??????????: ?????????????????,??????????????、???????、???????、???????、?????！ ??????-??????【??】??????????: ?????????????????,?????????????。????????????,???????,???????,?????,?????。 ??????-??????【??】??????????: ??????????????????????????,???????????,????????,?????????????????????。 ????-????【??】????????: ??????????????????????,????,????,??????????。???????????????,??,??,??????????,??????... ??????-??????【??】??????????: ??????????????、?????????,?????????,????,????????,????????????????! ????-????【??】????????: ??????????????????????,?????????,??????????,????????,?????! ??????-??????【??】??????????: ???????????????、????、????、??????、????、???????,?????,?????????! ??????-??????【??】??????????: ????????????????????????、??????,????、?????、????， ?????????，?????????????！ ????-????【??】????????: ????????????????、????、??????、????????,????????????,???????????！ ?????-?????【??】?????????: ????????????????????、????、????、??????、???????,??????、??????。 ?????-?????【??】?????????: ???????,??????,?????????????????????,???????????????????????。 ??????-??????【??】??????????: ????????????????????,?????????????????????,?????,????,???????. ??????-??????【??】??????????: ??????????????、??????、????、?????、?????!????,????????????????!????。 ????-????【??】????????: ??????????????????,?????,???????,???????????,??????! ?????-?????【??】?????????: ???????????、??、???????????,??????,????????,??????????????????...????。 ?????-?????【??】?????????: ??????????????、???????,?????????,???????????????,?????????????。

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• unable to update gridview

  - by bhakti

  Please help ,i have added update/edit command button in gridview so to update data in my sql server database but am unable to do it. Data is not updated in database . ======code for onrowupdate======================================== protected void gRowUpdate(object sender, GridViewUpdateEventArgs e) { Books b = null; b = new Books(); DataTable dt=null; GridView g = (GridView)sender; try { dt=new DataTable(); b = new Books(); b.author = Convert.ToString(g.Rows[e.RowIndex].FindControl("Author")); b.bookID = Convert.ToInt32(g.Rows[e.RowIndex].FindControl("BookID")); b.title = Convert.ToString(g.Rows[e.RowIndex].FindControl("Title")); b.price = Convert.ToDouble(g.Rows[e.RowIndex].FindControl("Price")); // b.rec = Convert.ToString(g.Rows[e.RowIndex].FindControl("Date_of_reciept")); b.ed = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); b.bill = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); b.cre_by = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); b.src = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); b.pages = Convert.ToInt32(g.Rows[e.RowIndex].FindControl("Edition")); b.pub = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); b.mod_by = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); b.remark = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); // b.year = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition")); b.updatebook(b); g.EditIndex = -1; dt = b.GetAllBooks(); g.DataSource = dt; g.DataBind(); } catch (Exception ex) { throw (ex); } finally { b = null; } } ===================My stored procedure for update book able to update database by exec in sqlserver mgmt studio========================== set ANSI_NULLS ON set QUOTED_IDENTIFIER ON go ALTER PROCEDURE [dbo].[usp_updatebook] @bookid bigint, @author varchar(50), @title varchar(50), @price bigint, @src_equisition varchar(50), @bill_no varchar(50), @publisher varchar(50), @pages bigint, @remark varchar(50), @edition varchar(50), @created_by varchar(50), @modified_by varchar(50) /*@date_of_reciept datetime, @year_of_publication datetime*/ AS declare @modified_on datetime set @modified_on=getdate() UPDATE books SET author=@author, title=@title, price=@price, src_equisition=@src_equisition, bill_no=@bill_no, publisher=@publisher, /*Date_of_reciept=@date_of_reciept,*/ pages=@pages, remark=@remark, edition=@edition, /*Year_of_publication=@year_of_publication,*/ created_by=@created_by, modified_on=@modified_on, modified_by=@modified_by WHERE bookid=@bookid ========================class library function for update==================== public void updatebook(Books b) { DataAccess dbAccess = null; SqlCommand cmd = null; try { dbAccess = new DataAccess(); cmd = dbAccess.GetSQLCommand("usp_updatebook", CommandType.StoredProcedure); cmd.Parameters.Add("@bookid", SqlDbType.VarChar, 50).Value = b.bookID; cmd.Parameters.Add("@author", SqlDbType.VarChar, 50).Value = b.author; cmd.Parameters.Add("@title", SqlDbType.VarChar, 50).Value = b.title; cmd.Parameters.Add("@price", SqlDbType.Money).Value = b.price; cmd.Parameters.Add("@publisher", SqlDbType.VarChar, 50).Value = b.pub; // cmd.Parameters.Add("@year_of_publication", SqlDbType.DateTime).Value =Convert.ToDateTime( b.year); cmd.Parameters.Add("@src_equisition", SqlDbType.VarChar, 50).Value = b.src; cmd.Parameters.Add("@bill_no", SqlDbType.VarChar, 50).Value = b.bill; cmd.Parameters.Add("@remark", SqlDbType.VarChar, 50).Value = b.remark; cmd.Parameters.Add("@pages", SqlDbType.Int).Value = b.pages; cmd.Parameters.Add("@edition", SqlDbType.VarChar, 50).Value = b.ed; // cmd.Parameters.Add("@date_of_reciept", SqlDbType.DateTime).Value = Convert.ToDateTime(b.rec); // cmd.Parameters.Add("@created_on", SqlDbType.DateTime).Value = Convert.ToDateTime(b.cre_on); cmd.Parameters.Add("@created_by", SqlDbType.VarChar, 50).Value = b.cre_by; //cmd.Parameters.Add("@modified_on", SqlDbType.DateTime).Value = Convert.ToDateTime(b.mod_on); cmd.Parameters.Add("@modified_by", SqlDbType.VarChar, 50).Value = b.mod_by; cmd.ExecuteNonQuery(); } catch (Exception ex) { throw (ex); } finally { if (cmd.Connection != null && cmd.Connection.State == ConnectionState.Open) cmd.Connection.Close(); dbAccess = null; cmd = null; } } I have also tried to do update by following way protected void gv1_updating(object sender, GridViewUpdateEventArgs e) { GridView g = (GridView)sender; abc a = new abc(); DataTable dt = new DataTable(); try { a.cd_Id = Convert.ToInt32(g.DataKeys[e.RowIndex].Values[0].ToString()); //TextBox b = (TextBox)g.Rows[e.RowIndex].Cells[0].FindControl("cd_id"); TextBox c = (TextBox)g.Rows[e.RowIndex].Cells[2].FindControl("cd_name"); TextBox d = (TextBox)g.Rows[e.RowIndex].Cells[3].FindControl("version"); TextBox f = (TextBox)g.Rows[e.RowIndex].Cells[4].FindControl("company"); TextBox h = (TextBox)g.Rows[e.RowIndex].Cells[6].FindControl("created_by"); TextBox i = (TextBox)g.Rows[e.RowIndex].Cells[8].FindControl("modified_by"); //a.cd_Id = Convert.ToInt32(b.Text); a.cd_name = c.Text; a.ver = d.Text; a.comp = f.Text; a.cre_by = h.Text; a.mod_by = i.Text; a.updateDigi(a); g.EditIndex = -1; dt = a.GetAllDigi(); g.DataSource = dt; g.DataBind(); } catch(Exception ex) { throw (ex); } finally { dt = null; a = null; g = null; } } =================== but have error of Index out of range exception========= please do reply,thanxs in advance

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• CodePlex Daily Summary for Wednesday, November 30, 2011

  CodePlex Daily Summary for Wednesday, November 30, 2011Popular ReleasesLINQ to Twitter: LINQ to Twitter Beta v2.0.22: New support for Windows Phone 7.1, 100% Twitter API coverage.Anno 2070 Assistant: Anno 2070 Assistant v1.1: Anno 2070 Assistant v1.1 Released! Features Included: Building Layouts for Ecos, Tycoons & Techs Production Chains for Ecos, Tycoons & Techs Supply Calculator New Features: The new supply calculator will tell you how many of each production chain you need to sustain the current population. Simply plot in your total inhabitants of each type and calculate! Coming in v2.0: Population Calculator Port from hard coded data to XML data Calculate by Residence Feature and some more secret ...Rawr: Rawr 4.3.0: This is the Downloadable WPF version of Rawr!For web-based version see http://elitistjerks.com/rawr.php You can find the version notes at: http://rawr.codeplex.com/wikipage?title=VersionNotes Rawr AddonWe now have a Rawr Official Addon for in-game exporting and importing of character data hosted on Curse. The Addon does not perform calculations like Rawr, it simply shows your exported Rawr data in wow tooltips and lets you export your character to Rawr (including bag and bank items) like Char...BugNET Issue Tracker: BugNET 0.9.131: This is a bug fix release for 0.9 that fixes a number of pressing issues. FixesBGN-1989 - User verification is not working on the latest release BGN-1988 - Send password notification does not include the actual password and throws an error BGN-1987 - Issues revisions stop being updated BGN-1985 - Search by issue id no longer works Fixed issue when user is not authenticated and clicks on the Vote link the user is redirected to page not found (wrong location for the Login.aspx page) N...QuickStart Engine (3D Game Engine for XNA): QuickStart Engine v0.23: Main FeaturesXNA 4.0 compatible Clean engine architecture Makes it easy to make your own game using the engine. Messaging system allows you to communicate between systems and other entities without coupling your code in ways you wouldn't want to. Entity/Component system allows you to make your own objects and customize them very easily. Terrain engine Quad-tree culling Multi-texture splatting Multi-texture normal mapping Smoothing and scaling Physics engine integration Uses Ji...Windows Azure Toolkit for Windows Phone: Windows Azure Toolkit for Windows Phone v1.3.2: Upgraded Windows Azure projects to Windows Azure SDK for .NET – November 2011. Updated BabelCam, CRUDSqlAzure, WPCloud.ACS, and WPCloud.SQL.ACS samples to include default ACS configuration to allow developers running the samples without owning an ACS namespace.VideoLan DotNet for WinForm, WPF & Silverlight 5: VideoLan DotNet for WinForm, WPF, SL5 - 2011.11.29: The new version add and correct many features : Add Medias list property to VlcControl Correction to implement Medias list property Add PlaybackMode property to VlcControl (Loop/Repeat/Default) Remove "--play-and-pause" option in WPF sample Add MediaList Interops Add MediaListPlayer Interops Correction on Interops (error) Add MediaSubItemAdded event on MediaBaseMFCMAPI: November 2011 Release: Build: 15.0.0.1029 Full release notes at SGriffin's blog. If you just want to run the MFCMAPI or MrMAPI, get the executables. If you want to debug them, get the symbol files and the source. The 64 bit builds will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit builds, regardless of the operating system. Facebook BadgeWCF Community Site: WCF Web API Preview 6: Welcome to the sixth preview release of WCF Web API on Codeplex! Install WCF Web API Preview 6 using NuGet New Features/EnhancementsURL form encoding - Http request bodies sent as application/x-www-form-urlencoded can now deserialize into objects and participate in content negotiation. Custom OData entity keys - The ODataFormatter now supports custom conventions for determining which properties identify an entity key. [ServiceContract] is no longer required on the Web API class definiti...Devpad: 4.11: Whats new for Devpad 4.11: New Import Archive Improved Save Dialog Improved Replace Dialog Improved Go To Dialog Minor Bug Fix's, improvements and speed upsHome Access Plus+: v7.7: v7.7.1128.2200Added: ShowTo Option on Resources Added: Basic Authentication Logon Method Added: Button on the Live Tracker page to clear logons in the database but not do a remote logoff Updated: jquery from v1.6.2 to v1.7.1 Fixed: Another attempt at fixing the SIMS import in the booking system Fixed: JSON Issues with the Setup Added: More DEBUG Events to the Event Log (note DEBUG not RELEASE) Added: Support for Week A Week B instead of Week 1 and Week 2 Updated: The My Files ...CommonLibrary.NET: CommonLibrary.NET 0.9.8 - Alpha: A collection of very reusable code and components in C# 4.0 ranging from ActiveRecord, Csv, Command Line Parsing, Configuration, Holiday Calendars, Logging, Authentication, and much more. Samples in <root>\src\Lib\CommonLibrary.NET\Samples CommonLibrary.NET 0.9.8 AlphaNew Dynamic Scripting Language : workitem : 7493 Fixes 1622 6803Widget Suite for DotNetNuke: 01.04.00: The following features/enhancements are associated with this release: Bug: Removed the empty box/white space created by some widgets New Widget: FlexSlider New Widget: Google+ Button New Widget: Klout Badge Sample Widget Script FileFxCop Integrator for Visual Studio 2010: FxCop Integrator 2.0.0 RC: Replaced the MSBuild Tasks installer to fix the bug of the targets file. FxCop Integrator is not affected by this bug. (Nov 28 2011) New FeatureSupported calculating code metrics with Code Metrics PowerTool. (Work Item #6568: 6568). Provided MSBuild tasks. #7454: 7454 Supported to filter out auto-generated code from code analysis result. #7485: 7485 Supported exporting report of code analysis result. Supported multi-project analysis. Supported file level analysis. Added the featu...Terminals: Version 2 - Beta 4 Release: Beta 4 Refresh Build Dont forget to backup your config files BEFORE upgrading! As usual, please take time to use and abuse this release. We left logging in place, and this is a debug build so be sure to submit your logs on each bug reported, and please do report all bugs! Updated the About form to include the date and time of the build. Useful for CI builds to ensure we have the correct version "Favourites" and "History" save their expanded states after app restarts Code cleanup, secu...MiniTwitter: 1.76: MiniTwitter 1.76 ???? ?? ?????????? User Streams ???????????? User Streams ???????????、??????????????? REST ?????????? ?????????????????????????????? ??????????????????????????????Media Companion: MC 3.424b Weekly: Ensure .NET 4.0 Full Framework is installed. (Available from http://www.microsoft.com/download/en/details.aspx?id=17718) Ensure the NFO ID fix is applied when transitioning from versions prior to 3.416b. (Details here) Movie Show Resolutions... Resolved issue when reverting multiselection of movies to "-none-" Added movie rename support for subtitle files '.srt' & '.sub' Finalised code for '-1' fix - radiobutton to choose either filename or title Fixed issue with Movie Batch Wizard Fanart - ...Advanced Windows Phone Enginering Tool: WPE Downloads: This version of WPE gives you basic updating, restoring, and, erasing for your Windows Phone device.Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.37: Fix for issue #16936 - CSS strings containing ASP.NET replacement blocks that contain the same delimiter character(s) as the CSS string cause the CSS parser to barf. Need to use the -aspnet:1 flag to treat the ASP.NET blocks as single entities. Added support for CSS3 @keyframes syntax. Added NuGet package support to the DLL project. Expand the -line switch to also optionally specify the multiline/single line mode, and the spaces-per-tab for multiline mode. Tweak the -pretty switch to be more ...Get simpler, simpler, and simpler: UI 0.1 Binary: Inklude: you can use it with lib, header and dlls. Uzing: you can use it by adding it to your project.New ProjectsArchiveBytes: ArchiveBytes is an archiving solution with rolling archive capabilities. Arduino Controller: Arduino Controller is a GUI to control and arduino wirelessly using: - XBEES - WIFI - Bluetooth All that is required is: - Arduino Controller - Your wireless technology - And an Arduino If you would like info I'm trying to put together sets that include: - Software - Arduino - And a wireless technology (your choice)Artesis - Studiegids MVC: Artesis StudiegidsAzureHost: AzureHost is a synchronization framework that makes it easy to deploy web application files to Windows Azure and keep them synchronized between Web Roles and Blob Storage. AzureHost is a fork of the Windows Azure Accelerator for Umbraco made more simple and generic.Codes Of My ACE Study: Activity-based Center ExpansionCoreGallery.NET: An extensible .NET-based photo gallery. Project has been inactive for some time and currently in very early planning/prototyping stages. Help is definitely welcome!Custom SharePoint Designer Activities for SharePoint 2010: This project adds to the power of SharePoint Designer workflows by adding additional activities that previously were not available including sending emails with attachments, custom from addresses, and much more. Created with visual studio 2010 for SharePoint 2010.Declarative command line parser: A powerful, declarative command-line parsing system in a single .cs file. This file is available as a nuget package (package id: declcmdparser) and can be easily included or excluded in your project.DevCow: This is a location for all of the community projects that help support DevCow.comejg: ejgFibo.Authority: a authority system based on nhibernate,autofac,asp.net MVC,jquery easyui and so on.Georgia Southern House Control: This is a semester project for a group of students at Georgia Southern university.JSAnalyse - Javascript Analyser and Dependency Checker: JSAnalyse - Javascript Analyser and Dependency CheckerLogger - logging for your .NET project using file, mail, debug output: A light weight yet competent logger for .NET with configurable output modules, such as log file, e-mail and debug log. Easy to add your own output module if needed.MetaEdit+ extension for Visual Studio: Visual Studio extension for integrating MetaEdit+ and Visual Studio. This extension allows you to browse MetaEdit+ models and use the main MetaEdit+ functions from Visual Studio. It can also automatically import into Visual Studio the source code generated from MetaEdit+. MonopolyPatrones: Proyecto de patrones de software universidad Javeriana ColombiaMulti-threaded simple Reversi game: XNA Reversi game supporting multi-core processors. NDuplicate: Finds duplicate code (methods) across a C# solution.Netduino-compatible embedded webserver: Embedded Webserver is a small footprint, multi-platform webserver implementation exposing IIS-like API to web enable your hobby project in four easy steps.Orchard UserReviewedItems: An Orchard module extension of the Contrib.Reviews module. Includes a orchard content part for showing the reviews that are written by the user of the current context.PivotViewer Extensions: PivotViewer Extensions is a collection of add-ons to the Silverlight 5 PivotViewer. PowerShell TFS Build Server CmdLets: A set of CmdLets for managing a Team Foundation Server (TFS) Build server through PowerShell. SABON: Simple Access Business Object Network. This is a JavaScript Library that provides quickest way on accessing HTML elements, and DOM this includes Object/Class Creator, Table Effects, Message Box, Object Pop-up, Email Notification, and caseed: Seed creates complete ASP.NET website from object oriented business model definitions. Programers serves programs? No... Programs serves programers, Yep! "Firstly, I think I will build a system with 90% solid functions, and 10% dynamiic functions, the dynamic functions is the flower blossoming from top of it."Sharpshooter: ????OOP??????，??????。Silverlight Front end calling WCF Service in Azure Web Role: I recently written a sample which has Windows Azure Web Role with Silverlight front end, calling to WCF service which is hosted in the same Windows Azure Web Role. SPWikiDialogFix: For SharePoint 2010: Fix to prevent users from receiving ‘The Ribbon Tab with id: "Ribbon.Read" has not been made available for this page or does not exist. Use Ribbon.MakeTabAvailable()’ when viewing wiki pages in dialog mode. For explanation and details, read the blog post at http://blog.furuknap.net/solving-the-ribbon-tab-with-id-ribbon-read-has-not-been-made-available-for-this-page-or-does-not-exist-use-ribbon-maketabavailable Written in C#, because you deserve it.Trinity Christian School Lunches: This is a semester project for a group of students at Georgia Southern University creating a software packages that allows a school to keep track of the lunch orders of students.wp7project: We`re just training...Zavida: C# learning curve.??: fff

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• Is there an equivalent to Java's ClassFileTransformer in .NET? (a way to replace a class)

  - by Alix

  I've been searching for this for quite a while with no luck so far. Is there an equivalent to Java's ClassFileTransformer in .NET? Basically, I want to create a class CustomClassFileTransformer (which in Java would implement the interface ClassFileTransformer) that gets called whenever a class is loaded, and is allowed to tweak it and replace it with the tweaked version. I know there are frameworks that do similar things, but I was looking for something more straightforward, like implementing my own ClassFileTransformer. Is it possible? EDIT #1. More details about why I need this: Basically, I have a C# application and I need to monitor the instructions it wants to run in order to detect read or write operations to fields (operations Ldfld and Stfld) and insert some instructions before the read/write takes place. I know how to do this (except for the part where I need to be invoked to replace the class): for every method whose code I want to monitor, I must: Get the method's MethodBody using MethodBase.GetMethodBody() Transform it to byte array with MethodBody.GetILAsByteArray(). The byte[] it returns contains the bytecode. Analyse the bytecode as explained here, possibly inserting new instructions or deleting/modifying existing ones by changing the contents of the array. Create a new method and use the new bytecode to create its body, with MethodBuilder.CreateMethodBody(byte[] il, int count), where il is the array with the bytecode. I put all these tweaked methods in a new class and use the new class to replace the one that was originally going to be loaded. An alternative to replacing classes would be somehow getting notified whenever a method is invoked. Then I'd replace the call to that method with a call to my own tweaked method, which I would tweak only the first time is invoked and then I'd put it in a dictionary for future uses, to reduce overhead (for future calls I'll just look up the method and invoke it; I won't need to analyse the bytecode again). I'm currently investigating ways to do this and LinFu looks pretty interesting, but if there was something like a ClassFileTransformer it would be much simpler: I just rewrite the class, replace it, and let the code run without monitoring anything. An additional note: the classes may be sealed. I want to be able to replace any kind of class, I cannot impose restrictions on their attributes. EDIT #2. Why I need to do this at runtime. I need to monitor everything that is going on so that I can detect every access to data. This applies to the code of library classes as well. However, I cannot know in advance which classes are going to be used, and even if I knew every possible class that may get loaded it would be a huge performance hit to tweak all of them instead of waiting to see whether they actually get invoked or not. POSSIBLE (BUT PRETTY HARDCORE) SOLUTION. In case anyone is interested (and I see the question has been faved, so I guess someone is), this is what I'm looking at right now. Basically I'd have to implement the profiling API and I'll register for the events that I'm interested in, in my case whenever a JIT compilation starts. An extract of the blogpost: In your ICorProfilerCallback2::ModuleLoadFinished callback, you call ICorProfilerInfo2::GetModuleMetadata to get a pointer to a metadata interface on that module. QI for the metadata interface you want. Search MSDN for "IMetaDataImport", and grope through the table of contents to find topics on the metadata interfaces. Once you're in metadata-land, you have access to all the types in the module, including their fields and function prototypes. You may need to parse metadata signatures and this signature parser may be of use to you. In your ICorProfilerCallback2::JITCompilationStarted callback, you may use ICorProfilerInfo2::GetILFunctionBody to inspect the original IL, and ICorProfilerInfo2::GetILFunctionBodyAllocator and then ICorProfilerInfo2::SetILFunctionBody to replace that IL with your own. The great news: I get notified when a JIT compilation starts and I can replace the bytecode right there, without having to worry about replacing the class, etc. The not-so-great news: you cannot invoke managed code from the API's callback methods, which makes sense but means I'm on my own parsing the IL code, etc, as opposed to be able to use Cecil, which would've been a breeze. I don't think there's a simpler way to do this without using AOP frameworks (such as PostSharp). If anyone has any other idea please let me know. I'm not marking the question as answered yet.

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• Using WeakReference to resolve issue with .NET unregistered event handlers causing memory leaks.

  - by Eric

  The problem: Registered event handlers create a reference from the event to the event handler's instance. If that instance fails to unregister the event handler (via Dispose, presumably), then the instance memory will not be freed by the garbage collector. Example: class Foo { public event Action AnEvent; public void DoEvent() { if (AnEvent != null) AnEvent(); } } class Bar { public Bar(Foo l) { l.AnEvent += l_AnEvent; } void l_AnEvent() { } } If I instantiate a Foo, and pass this to a new Bar constructor, then let go of the Bar object, it will not be freed by the garbage collector because of the AnEvent registration. I consider this a memory leak, and seems just like my old C++ days. I can, of course, make Bar IDisposable, unregister the event in the Dispose() method, and make sure to call Dispose() on instances of it, but why should I have to do this? I first question why events are implemented with strong references? Why not use weak references? An event is used to abstractly notify an object of changes in another object. It seems to me that if the event handler's instance is no longer in use (i.e., there are no non-event references to the object), then any events that it is registered with should automatically be unregistered. What am I missing? I have looked at WeakEventManager. Wow, what a pain. Not only is it very difficult to use, but its documentation is inadequate (see http://msdn.microsoft.com/en-us/library/system.windows.weakeventmanager.aspx -- noticing the "Notes to Inheritors" section that has 6 vaguely described bullets). I have seen other discussions in various places, but nothing I felt I could use. I propose a simpler solution based on WeakReference, as described here. My question is: Does this not meet the requirements with significantly less complexity? To use the solution, the above code is modified as follows: class Foo { public WeakReferenceEvent AnEvent = new WeakReferenceEvent(); internal void DoEvent() { AnEvent.Invoke(); } } class Bar { public Bar(Foo l) { l.AnEvent += l_AnEvent; } void l_AnEvent() { } } Notice two things: 1. The Foo class is modified in two ways: The event is replaced with an instance of WeakReferenceEvent, shown below; and the invocation of the event is changed. 2. The Bar class is UNCHANGED. No need to subclass WeakEventManager, implement IWeakEventListener, etc. OK, so on to the implementation of WeakReferenceEvent. This is shown here. Note that it uses the generic WeakReference that I borrowed from here: http://damieng.com/blog/2006/08/01/implementingweakreferencet I had to add Equals() and GetHashCode() to his class, which I include below for reference. class WeakReferenceEvent { public static WeakReferenceEvent operator +(WeakReferenceEvent wre, Action handler) { wre._delegates.Add(new WeakReference<Action>(handler)); return wre; } public static WeakReferenceEvent operator -(WeakReferenceEvent wre, Action handler) { foreach (var del in wre._delegates) if (del.Target == handler) { wre._delegates.Remove(del); return wre; } return wre; } HashSet<WeakReference<Action>> _delegates = new HashSet<WeakReference<Action>>(); internal void Invoke() { HashSet<WeakReference<Action>> toRemove = null; foreach (var del in _delegates) { if (del.IsAlive) del.Target(); else { if (toRemove == null) toRemove = new HashSet<WeakReference<Action>>(); toRemove.Add(del); } } if (toRemove != null) foreach (var del in toRemove) _delegates.Remove(del); } } public class WeakReference<T> : IDisposable { private GCHandle handle; private bool trackResurrection; public WeakReference(T target) : this(target, false) { } public WeakReference(T target, bool trackResurrection) { this.trackResurrection = trackResurrection; this.Target = target; } ~WeakReference() { Dispose(); } public void Dispose() { handle.Free(); GC.SuppressFinalize(this); } public virtual bool IsAlive { get { return (handle.Target != null); } } public virtual bool TrackResurrection { get { return this.trackResurrection; } } public virtual T Target { get { object o = handle.Target; if ((o == null) || (!(o is T))) return default(T); else return (T)o; } set { handle = GCHandle.Alloc(value, this.trackResurrection ? GCHandleType.WeakTrackResurrection : GCHandleType.Weak); } } public override bool Equals(object obj) { var other = obj as WeakReference<T>; return other != null && Target.Equals(other.Target); } public override int GetHashCode() { return Target.GetHashCode(); } } It's functionality is trivial. I override operator + and - to get the += and -= syntactic sugar matching events. These create WeakReferences to the Action delegate. This allows the garbage collector to free the event target object (Bar in this example) when nobody else is holding on to it. In the Invoke() method, simply run through the weak references and call their Target Action. If any dead (i.e., garbage collected) references are found, remove them from the list. Of course, this only works with delegates of type Action. I tried making this generic, but ran into the missing where T : delegate in C#! As an alternative, simply modify class WeakReferenceEvent to be a WeakReferenceEvent, and replace the Action with Action. Fix the compiler errors and you have a class that can be used like so: class Foo { public WeakReferenceEvent<int> AnEvent = new WeakReferenceEvent<int>(); internal void DoEvent() { AnEvent.Invoke(5); } } Hopefully this will help someone else when they run into the mystery .NET event memory leak!

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• Problem with Variable Scoping in Rebol's Object

  - by Rebol Tutorial

  I have modified the rebodex app so that it can be called from rebol's console any time by typing rebodex. To show the title of the app, I need to store it in app-title: system/script/header/title so tha it could be used later in view/new/title dex reform [self/app-title version] That works but as you can see I have named the var name "app-title", but if I use "title" instead, the window caption would show weird stuff (vid code). Why ? REBOL [ Title: "Rebodex" Date: 23-May-2010 Version: 2.1.1 File: %rebodex.r Author: "Carl Sassenrath" Modification: "Rebtut" Purpose: "A simple but useful address book contact database." Email: %carl--rebol--com library: [ level: 'intermediate platform: none type: 'tool domain: [file-handling DB GUI] tested-under: none support: none license: none see-also: none ] ] rebodex.context: context [ app-title: system/script/header/title version: system/script/header/version set 'rebodex func[][ names-path: %names.r ;data file name-list: none fields: [name company title work cell home car fax web email smail notes updat] names: either exists? names-path [load names-path][ [[name "Carl Sassenrath" title "Founder" company "REBOL Technologies" email "%carl--rebol--com" web "http://www.rebol.com"]] ] brws: [ if not empty? web/text [ if not find web/text "http://" [insert web/text "http://"] error? try [browse web/text] ] ] dial: [request [rejoin ["Dial number for " name/text "? (Not implemented.)"] "Dial" "Cancel"]] dex-styles: stylize [ lab: label 60x20 right bold middle font-size 11 btn: button 64x20 font-size 11 edge [size: 1x1] fld: field 200x20 font-size 11 middle edge [size: 1x1] inf: info font-size 11 middle edge [size: 1x1] ari: field wrap font-size 11 edge [size: 1x1] with [flags: [field tabbed]] ] dex-pane1: layout/offset [ origin 0 space 2x0 across styles dex-styles lab "Name" name: fld bold return lab "Title" title: fld return lab "Company" company: fld return lab "Email" email: fld return lab "Web" brws web: fld return lab "Address" smail: ari 200x72 return lab "Updated" updat: inf 200x20 return ] 0x0 updat/flags: none dex-pane2: layout/offset [ origin 0 space 2x0 across styles dex-styles lab "Work #" dial work: fld 140 return lab "Home #" dial home: fld 140 return lab "Cell #" dial cell: fld 140 return lab "Alt #" dial car: fld 140 return lab "Fax #" fax: fld 140 return lab "Notes" notes: ari 140x72 return pad 136x1 btn "Close" #"^q" [store-entry save-file unview] ] 0x0 dex: layout [ origin 8x8 space 0x1 styles dex-styles srch: fld 196x20 bold across rslt: list 180x150 [ nt: txt 178x15 middle font-size 11 [ store-entry curr: cnt find-name nt/text update-entry unfocus show dex ] ] supply [ cnt: count + scroll-off face/text: "" face/color: snow if not n: pick name-list cnt [exit] face/text: select n 'name face/font/color: black if curr = cnt [face/color: system/view/vid/vid-colors/field-select] ] sl: slider 16x150 [scroll-list] return return btn "New" #"^n" [new-name] btn "Del" #"^d" [delete-name unfocus update-entry search-all show dex] btn "Sort" [sort names sort name-list show rslt] return at srch/offset + (srch/size * 1x0) bx1: box dex-pane1/size bx2: box dex-pane2/size return ] bx1/pane: dex-pane1/pane bx2/pane: dex-pane2/pane rslt/data: [] this-name: first names name-list: copy names curr: none search-text: "" scroll-off: 0 srch/feel: make srch/feel [ redraw: func [face act pos][ face/color: pick face/colors face system/view/focal-face if all [face = system/view/focal-face face/text search-text] [ search-text: copy face/text search-all if 1 = length? name-list [this-name: first name-list update-entry show dex] ] ] ] update-file: func [data] [ set [path file] split-path names-path if not exists? path [make-dir/deep path] write names-path data ] save-file: has [buf] [ buf: reform [{REBOL [Title: "Name Database" Date:} now "]^/[^/"] foreach n names [repend buf [mold n newline]] update-file append buf "]" ] delete-name: does [ remove find/only names this-name if empty? names [append-empty] save-file new-name ] clean-names: function [][n][ forall names [ if any [empty? first names none? n: select first names 'name empty? n][ remove names ] ] names: head names ] search-all: function [] [ent flds] [ clean-names clear name-list flds: [name] either empty? search-text [insert name-list names][ foreach nam names [ foreach word flds [ if all [ent: select nam word find ent search-text][ append/only name-list nam break ] ] ] ] scroll-off: 0 sl/data: 0 resize-drag scroll-list curr: none show [rslt sl] ] new-name: does [ store-entry clear-entry search-all append-empty focus name ; update-entry ] append-empty: does [append/only names this-name: copy []] find-name: function [str][] [ foreach nam names [ if str = select nam 'name [ this-name: nam break ] ] ] store-entry: has [val ent flag] [ flag: 0 if not empty? trim name/text [ foreach word fields [ val: trim get in get word 'text either ent: select this-name word [ if ent val [insert clear ent val flag: flag + 1] ][ if not empty? val [repend this-name [word copy val] flag: flag + 1] ] if flag = 1 [flag: 2 updat/text: form now] ] if not zero? flag [save-file] ] ] update-entry: does [ foreach word fields [ insert clear get in get word 'text any [select this-name word ""] ] show rslt ] clear-entry: does [ clear-fields bx1 clear-fields bx2 updat/text: form now unfocus show dex ] show-names: does [ clear rslt/data foreach n name-list [ if n/name [append rslt/data n/name] ] show rslt ] scroll-list: does [ scroll-off: max 0 to-integer 1 + (length? name-list) - (100 / 16) * sl/data show rslt ] do resize-drag: does [sl/redrag 100 / max 1 (16 * length? name-list)] center-face dex new-name focus srch show-names view/new/title dex reform [app-title version] insert-event-func [ either all [event/type = 'close event/face = dex][ store-entry unview ][event] ] do-events ] ]

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• Detecting HTML5/CSS3 Features using Modernizr

  - by dwahlin

  HTML5, CSS3, and related technologies such as canvas and web sockets bring a lot of useful new features to the table that can take Web applications to the next level. These new technologies allow applications to be built using only HTML, CSS, and JavaScript allowing them to be viewed on a variety of form factors including tablets and phones. Although HTML5 features offer a lot of promise, it’s not realistic to develop applications using the latest technologies without worrying about supporting older browsers in the process. If history has taught us anything it’s that old browsers stick around for years and years which means developers have to deal with backward compatibility issues. This is especially true when deploying applications to the Internet that target the general public. This begs the question, “How do you move forward with HTML5 and CSS3 technologies while gracefully handling unsupported features in older browsers?” Although you can write code by hand to detect different HTML5 and CSS3 features, it’s not always straightforward. For example, to check for canvas support you need to write code similar to the following:   <script> window.onload = function () { if (canvasSupported()) { alert('canvas supported'); } }; function canvasSupported() { var canvas = document.createElement('canvas'); return (canvas.getContext && canvas.getContext('2d')); } </script> If you want to check for local storage support the following check can be made. It’s more involved than it should be due to a bug in older versions of Firefox. <script> window.onload = function () { if (localStorageSupported()) { alert('local storage supported'); } }; function localStorageSupported() { try { return ('localStorage' in window && window['localStorage'] != null); } catch(e) {} return false; } </script> Looking through the previous examples you can see that there’s more than meets the eye when it comes to checking browsers for HTML5 and CSS3 features. It takes a lot of work to test every possible scenario and every version of a given browser. Fortunately, you don’t have to resort to writing custom code to test what HTML5/CSS3 features a given browser supports. By using a script library called Modernizr you can add checks for different HTML5/CSS3 features into your pages with a minimal amount of code on your part. Let’s take a look at some of the key features Modernizr offers.   Getting Started with Modernizr The first time I heard the name “Modernizr” I thought it “modernized” older browsers by added missing functionality. In reality, Modernizr doesn’t actually handle adding missing features or “modernizing” older browsers. The Modernizr website states, “The name Modernizr actually stems from the goal of modernizing our development practices (and ourselves)”. Because it relies on feature detection rather than browser sniffing (a common technique used in the past – that never worked that great), Modernizr definitely provides a more modern way to test features that a browser supports and can even handle loading additional scripts called shims or polyfills that fill in holes that older browsers may have. It’s a great tool to have in your arsenal if you’re a web developer. Modernizr is available at http://modernizr.com. Two different types of scripts are available including a development script and custom production script. To generate a production script, the site provides a custom script generation tool rather than providing a single script that has everything under the sun for HTML5/CSS3 feature detection. Using the script generation tool you can pick the specific test functionality that you need and ignore everything that you don’t need. That way the script is kept as small as possible. An example of the custom script download screen is shown next. Notice that specific CSS3, HTML5, and related feature tests can be selected. Once you’ve downloaded your custom script you can add it into your web page using the standard <script> element and you’re ready to start using Modernizr. <script src="Scripts/Modernizr.js" type="text/javascript"></script>   Modernizr and the HTML Element Once you’ve add a script reference to Modernizr in a page it’ll go to work for you immediately. In fact, by adding the script several different CSS classes will be added to the page’s <html> element at runtime. These classes define what features the browser supports and what features it doesn’t support. Features that aren’t supported get a class name of “no-FeatureName”, for example “no-flexbox”. Features that are supported get a CSS class name based on the feature such as “canvas” or “websockets”. An example of classes added when running a page in Chrome is shown next:   <html class=" js flexbox canvas canvastext webgl no-touch geolocation postmessage websqldatabase indexeddb hashchange history draganddrop websockets rgba hsla multiplebgs backgroundsize borderimage borderradius boxshadow textshadow opacity cssanimations csscolumns cssgradients cssreflections csstransforms csstransforms3d csstransitions fontface generatedcontent video audio localstorage sessionstorage webworkers applicationcache svg inlinesvg smil svgclippaths"> Here’s an example of what the <html> element looks like at runtime with Internet Explorer 9:   <html class=" js no-flexbox canvas canvastext no-webgl no-touch geolocation postmessage no-websqldatabase no-indexeddb hashchange no-history draganddrop no-websockets rgba hsla multiplebgs backgroundsize no-borderimage borderradius boxshadow no-textshadow opacity no-cssanimations no-csscolumns no-cssgradients no-cssreflections csstransforms no-csstransforms3d no-csstransitions fontface generatedcontent video audio localstorage sessionstorage no-webworkers no-applicationcache svg inlinesvg smil svgclippaths">   When using Modernizr it’s a common practice to define an <html> element in your page with a no-js class added as shown next:   <html class="no-js">   You’ll see starter projects such as HTML5 Boilerplate (http://html5boilerplate.com) or Initializr (http://initializr.com) follow this approach (see my previous post for more information on HTML5 Boilerplate). By adding the no-js class it’s easy to tell if a browser has JavaScript enabled or not. If JavaScript is disabled then no-js will stay on the <html> element. If JavaScript is enabled, no-js will be removed by Modernizr and a js class will be added along with other classes that define supported/unsupported features. Working with HTML5 and CSS3 Features You can use the CSS classes added to the <html> element directly in your CSS files to determine what style properties to use based upon the features supported by a given browser. For example, the following CSS can be used to render a box shadow for browsers that support that feature and a simple border for browsers that don’t support the feature: .boxshadow #MyContainer { border: none; -webkit-box-shadow: #666 1px 1px 1px; -moz-box-shadow: #666 1px 1px 1px; } .no-boxshadow #MyContainer { border: 2px solid black; }   If a browser supports box-shadows the boxshadow CSS class will be added to the <html> element by Modernizr. It can then be associated with a given element. This example associates the boxshadow class with a div with an id of MyContainer. If the browser doesn’t support box shadows then the no-boxshadow class will be added to the <html> element and it can be used to render a standard border around the div. This provides a great way to leverage new CSS3 features in supported browsers while providing a graceful fallback for older browsers. In addition to using the CSS classes that Modernizr provides on the <html> element, you also use a global Modernizr object that’s created. This object exposes different properties that can be used to detect the availability of specific HTML5 or CSS3 features. For example, the following code can be used to detect canvas and local storage support. You can see that the code is much simpler than the code shown at the beginning of this post. It also has the added benefit of being tested by a large community of web developers around the world running a variety of browsers.   $(document).ready(function () { if (Modernizr.canvas) { //Add canvas code } if (Modernizr.localstorage) { //Add local storage code } }); The global Modernizr object can also be used to test for the presence of CSS3 features. The following code shows how to test support for border-radius and CSS transforms:   $(document).ready(function () { if (Modernizr.borderradius) { $('#MyDiv').addClass('borderRadiusStyle'); } if (Modernizr.csstransforms) { $('#MyDiv').addClass('transformsStyle'); } });   Several other CSS3 feature tests can be performed such as support for opacity, rgba, text-shadow, CSS animations, CSS transitions, multiple backgrounds, and more. A complete list of supported HTML5 and CSS3 tests that Modernizr supports can be found at http://www.modernizr.com/docs.   Loading Scripts using Modernizr In cases where a browser doesn’t support a specific feature you can either provide a graceful fallback or load a shim/polyfill script to fill in missing functionality where appropriate (more information about shims/polyfills can be found at https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-Browser-Polyfills). Modernizr has a built-in script loader that can be used to test for a feature and then load a script if the feature isn’t available. The script loader is built-into Modernizr and is also available as a standalone yepnope script (http://yepnopejs.com). It’s extremely easy to get started using the script loader and it can really simplify the process of loading scripts based on the availability of a particular browser feature. To load scripts dynamically you can use Modernizr’s load() function which accepts properties defining the feature to test (test property), the script to load if the test succeeds (yep property), the script to load if the test fails (nope property), and a script to load regardless of if the test succeeds or fails (both property). An example of using load() with these properties is show next: Modernizr.load({ test: Modernizr.canvas, yep: 'html5CanvasAvailable.js’, nope: 'excanvas.js’, both: 'myCustomScript.js' }); In this example Modernizr is used to not only load scripts but also to test for the presence of the canvas feature. If the target browser supports the HTML5 canvas then the html5CanvasAvailable.js script will be loaded along with the myCustomScript.js script (use of the yep property in this example is a bit contrived – it was added simply to demonstrate how the property can be used in the load() function). Otherwise, a polyfill script named excanvas.js will be loaded to add missing canvas functionality for Internet Explorer versions prior to 9. Once excanvas.js is loaded the myCustomScript.js script will be loaded. Because Modernizr handles loading scripts, you can also use it in creative ways. For example, you can use it to load local scripts when a 3rd party Content Delivery Network (CDN) such as one provided by Google or Microsoft is unavailable for whatever reason. The Modernizr documentation provides the following example that demonstrates the process for providing a local fallback for jQuery when a CDN is down:   Modernizr.load([ { load: '//ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.js', complete: function () { if (!window.jQuery) { Modernizr.load('js/libs/jquery-1.6.4.min.js'); } } }, { // This will wait for the fallback to load and // execute if it needs to. load: 'needs-jQuery.js' } ]); This code attempts to load jQuery from the Google CDN first. Once the script is downloaded (or if it fails) the function associated with complete will be called. The function checks to make sure that the jQuery object is available and if it’s not Modernizr is used to load a local jQuery script. After all of that occurs a script named needs-jQuery.js will be loaded. Conclusion If you’re building applications that use some of the latest and greatest features available in HTML5 and CSS3 then Modernizr is an essential tool. By using it you can reduce the amount of custom code required to test for browser features and provide graceful fallbacks or even load shim/polyfill scripts for older browsers to help fill in missing functionality. 

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• CodePlex Daily Summary for Tuesday, November 08, 2011

  CodePlex Daily Summary for Tuesday, November 08, 2011Popular ReleasesFacebook C# SDK: v5.3.2: This is a RTW release which adds new features and bug fixes to v5.2.1. Query/QueryAsync methods uses graph api instead of legacy rest api. removed dependency from Code Contracts enabled Task Parallel Support in .NET 4.0+ (experimental) added support for early preview for .NET 4.5 (binaries not distributed in codeplex nor nuget.org, will need to manually build from Facebook-Net45.sln) added additional method overloads for .NET 4.5 to support IProgress<T> for upload progress added ne...Delete Inactive TS Ports: List and delete the Inactive TS Ports: List and delete the Inactive TS Ports - The InactiveTSPortList.EXE accepts command line arguments The InactiveTSPortList.Standalone.WithoutPrompt.exe runs as a standalone exe without the need for any command line arguments.ClosedXML - The easy way to OpenXML: ClosedXML 0.60.0: Added almost full support for auto filters (missing custom date filters). See examples Filter Values, Custom Filters Fixed issues 7016, 7391, 7388, 7389, 7198, 7196, 7194, 7186, 7067, 7115, 7144Microsoft Research Boogie: Nightly builds: This download category contains automatically released nightly builds, reflecting the current state of Boogie's development. We try to make sure each nightly build passes the test suite. If you suspect that was not the case, please try the previous nightly build to see if that really is the problem. Also, please see the installation instructions.DotSpatial: Release 821: Updated releaseGoogleMap Control: GoogleMap Control 6.0: Major design changes to the control in order to achieve better scalability and extensibility for the new features comming with GoogleMaps API. GoogleMap control switched to GoogleMaps API v3 and .NET 4.0. GoogleMap control is 100% ScriptControl now, it requires ScriptManager to be registered on the pages where and before it is used. Markers, polylines, polygons and directions were implemented as ExtenderControl, instead of being inner properties of GoogleMap control. Better perfomance. Better...WDTVHubGen - Adds Metadata, thumbnails and subtitles to WDTV Live Hubs: V2.1: Version 2.1 (click on the right) this uses V4.0 of .net Version 2.1 adds the following features: (apologize if I forget some, added a lot of little things) Manual Lookup with TV or Movie (finally huh!), you can look up a movie or TV episode directly, you can right click on anythign, and choose manual lookup, then will allow you to type anything you want to look up and it will assign it to the file you right clicked. No Rename: a very popular request, this is an option you can set so that t...SubExtractor: Release 1020: Feature: added "baseline double quotes" character to selector box Feature: added option to save SRT files as ANSI (instead of previous UTF-8 only) Feature: made "Save Sup files to Source directory" apply to both Sup and Idx source files. Fix: removed SDH text (...) or [...] that is split over 2 lines Fix: better decision-making in when to prefix a line with a '-' because SDH was removedAcDown????? - Anime&Comic Downloader: AcDown????? v3.6.1: ?? ● AcDown??????????、??????，??????????????????????，???????Acfun、Bilibili、???、???、???、Tucao.cc、SF???、?????80????，???????????、?????????。 ● AcDown???????????????????????????，???，???????????????????。 ● AcDown???????C#??，????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7 ????????????? ??：????????Windows XP???,?????????.NET Framework 2.0???(x86)?.NET Framework 2.0???(x64)，?????"?????????"??? ??????????????，??????????： ??"AcDown?????"????????? ?? v3.6.1?? ??.hlv...Track Folder Changes: Track Folder Changes 1.1: Fixed exception when right-clicking the root nodeMapWindow 4: MapWindow GIS v4.8.6 - Final release - 32Bit: This is the final release of MapWindow v4.8. It has 4.8.6 as version number. This version has been thoroughly tested. If you do get an exception send the exception to us. Don't forget to include your e-mail address. Use the forums at http://www.mapwindow.org/phorum/ for questions. Please consider donating a small portion of the money you have saved by having free GIS tools: http://www.mapwindow.org/pages/donate.php What’s New in 4.8.6 (Final release) · A few minor issues have been fixed Wha...Kinect Paint: Kinect Paint 1.1: Updated for Kinect for Windows SDK v1.0 Beta 2!Kinect Mouse Cursor: Kinect Mouse Cursor 1.1: Updated for Kinect for Windows SDK v1.0 Beta 2!Coding4Fun Kinect Toolkit: Coding4Fun Kinect Toolkit 1.1: Updated for Kinect for Windows SDK v1.0 Beta 2!Async Executor: 1.0: Source code of the AsyncExecutorMedia Companion: MC 3.421b Weekly: Ensure .NET 4.0 Full Framework is installed. (Available from http://www.microsoft.com/download/en/details.aspx?id=17718) Ensure the NFO ID fix is applied when transitioning from versions prior to 3.416b. (Details here) TV Show Resolutions... Fix to show the season-specials.tbn when selecting an episode from season 00. Before, MC would try & load season00.tbn Fix for issue #197 - new show added by 'Manually Add Path' not being picked up. Also made non-visible the same thing in Root Folders...?????????? - ????????: All-In-One Code Framework ??? 2011-11-02: http://download.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=1codechs&DownloadId=216140 ??????，11??，?????20????Microsoft OneCode Sample，????6?Program Language Sample，2?Windows Base Sample，2?GDI+ Sample，4?Internet Explorer Sample?6?ASP.NET Sample。?????????????。 ????，?????。http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=1code&DownloadId=128165 Program Language CSImageFullScreenSlideShow VBImageFullScreenSlideShow CSDynamicallyBuildLambdaExpressionWithFie...Python Tools for Visual Studio: 1.1 Alpha: We’re pleased to announce the release of Python Tools for Visual Studio 1.1 Alpha. Python Tools for Visual Studio (PTVS) is an open-source plug-in for Visual Studio which supports programming with the Python programming language. This release includes new core IDE features, a couple of new sample libraries for interacting with Kinect and Excel, and many bug fixes for issues reported since the release of 1.0. For the core IDE features we’ve added many new features which improve the basic edit...BExplorer (Better Explorer): Better Explorer 2.0.0.631 Alpha: Changelog: Added: Some new functions in ribbon Added: Possibility to choose displayed columns Added: Basic Search Fixed: Some bugs after navigation Fixed: Attempt to fix slow navigation and slow start Known issues: - BreadcrumbBar fails on some situations - Basic search does not work well in some situations Please if anyone finds bugs be kind and report them at the Issue Tracker! Thanks!DotNetNuke® Community Edition: 05.06.04: Major Highlights Fixed issue with upgrades on systems that had upgraded the Telerik library to 6.0.0 Fixed issue with Razor Host upgrade to 5.6.3 The logic for module administration checks contains incorrect logic in 1 place, opening the possibility of a user with edit permissions gaining access to functionality they should not have through a particularly crafted url Security FixesBrowsers support the ability to remember common strings such as usernames/addresses etc. Code was adde...New ProjectsAddThis for DotNetNuke: A simple AddThis module (plugin) for DotNetNukeAgnisExchange: <AGNIS>as A Growable Network Infor;ation System is developped in <C#>Blogger auto poster: Do you want to have a links blog? Share your favorites links in Google+ and then allow BAP(Blogger auto poster) to read its JSON feed and post its daily summary at your Blogger weblog automatically. CarbonEmissions: CarbonEmissionsCredivale: CredivaleCRM 2011 TreeView for Lookup: CRM 2011 WebResource Utility for showing Self-Joined Lookup data in TreeView form.Dafuscator: Dafuscator is a database data obfuscation system that allows you to tactically obfuscate or delete data out of your production database while leaving most of the data intact.DigDesDevSchoolHomeSaleSystem: This is study project. Done by Russian students. Use ASP.NET MVC.Dynamic Data Extensions: Dynamic Data Extensions add new features to the current ASP.Net 4 Dynamic Data versionEchosoft NoCrash From Scratch: Nocrash From scratch, a operating system designed (but not promised to be) almost invincible from viruses and %20 Windows-like using DoubleTime emulation to make it act like Windows 2000EdiProj: Just a PHP and Asp.Net project.experteer: decision theory class projectFlan Project: Fast-paced Action-RPG (2D Scrolling)GameXNA_Master: XNA MASETR GD 2011 Gyrf: SecretJogo Da Velha em CSharp: Jogo da velha feito para o curso de c#.Jogo das cores: Projeto da aula de extensão de C#Kookaburra: Kookaburra is a framework based on Windows PowerShell 2.0 that can be used for automating SharePoint 2010 administration. It contains a menu, several functions and a well defined structure for adding PowerShell scriptlets.LaunchWithParams: LaunchWithParams is a Windows Explorer add-on that allows you to launch an application executable with specific command-line parameters without having to open a command prompt.MerchantTribe - Shopping Cart and Ecommerce Platform in C# MVC ASP.NET: MerchantTribe is a free, open-source ASP.NET MVC ecommerce platform in C#. For more than a decade, we've been building and selling commercial .NET shopping cart software. Now, we're releasing an open-source project based on our award winning BV Commerce software. Thousands of companies use our shopping cart include Pebble Beach Resorts, DataPipe, TastyKake, MathBlaster and Chesapeake Energy. We need as many people as possible using MerchantTribe for it to thrive. We need Merchants, De...NaiveAlgorithms: Naive C# implementation of basic, general purpose algorithms, with an emphasis on readability, maintainability and correctness. While asymptotic complexity of algorithms is preserved, there is no premature optimisation performed to improve performance. NeonMikaWebserver: NeonMikaWebserver is easy to set up on your .Net MF device, as long as it has an ethernet port. It's espacially created for the Netduino, but I think it's no big work to port it to other plattforms. It provides the following functionalities: -XML Responses ... Just create an Instance of XMLResponse, give it an URI to listen for and fill a Hashtable with your response keys and values... Voila ;) -File Response ... No XML Response fitting your URL? Probably you want to watch a file sa...Next Action: The Next Action web application is a GTD task manager implemented with using MVC3, jQuery, Entity Framework. Orchard Comments Refactoring: Refactoring Orchard's comments moduleoutsource: outsourceScutex: Scutex, pronounced (sec-u-techs), is a 100% managed .Net Framework licensing platform for your applications. Scutex is a flexible licensing system allowing multiple licensing schemes allowing you the most control over how you licensing your products. Unlike any other licensing system on the market, Scutex provides 4 distinct licensing schemes, allowing you to protect your products at different levels using completely different licensing schemes, key types and protection systems. Using Scut...sigem2: Proyecto sigem2SSDL: An easy way to call and manage stored procedures in .NET.Trabalho C# - Datilografia: Software de datilografia produzido para o curso de extensão em C# da UFSCar Sorocaba.triliporra: Triliporra Euro 2012User Interface Toolkit: Ever dreamed about having one framework to write UI independently of your targetted client ? Now your dream has come true !vimrc: my vimrc fileVisuospatial Web Browsing using Kinect: The Kinect Web Browser project explores how users might use the Kinect sensor as a natural interface to browse the visual web. It's developed in C#.VNManager: VNManager or Version Number Manager is a simple Windows command line application which will update your Microsoft Visual Studio AssemblyInfo.cs files AssemblyVersion and AssemblyFileVersion attributes based on rules defined as comments on the same lines.WeddingAssistant: My site will be a ‘gift wish’ site for couples getting married. It will also be a place where people can come and look at ideas for hen and stag nights. Users log in and create a list of items they wish to receive for their wedding or look for ideas for hen and stag nights. The site will allow users to compile a list of items they have found on the internet from specific listed shops and order them in preference. The compiled list is then sent out to friends and relatives who can create a...WMS.NET: thewms is warehouse manager system! For the logistics industry! The team learning project! Built on the mvc3.0 and wcf ! Using jquery js framework as front endWorkflowRobot: Workflow based automation software.

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• XmlSerializer throws exception when serializing dynamically loaded type

  - by Dr. Sbaitso

  Hi I'm trying to use the System.Xml.Serialization.XmlSerializer to serialize a dynamically loaded (and compiled class). If I build the class in question into the main assembly, everything works as expected. But if I compile and load the class from an dynamically loaded assembly, the XmlSerializer throws an exception. What am I doing wrong? I've created the following .NET 3.5 C# application to reproduce the issue: using System; using System.Collections.Generic; using System.Xml.Serialization; using System.Text; using System.Reflection; using System.CodeDom.Compiler; using Microsoft.CSharp; public class StaticallyBuiltClass { public class Item { public string Name { get; set; } public int Value { get; set; } } private List<Item> values = new List<Item>(); public List<Item> Values { get { return values; } set { values = value; } } } static class Program { static void Main() { RunStaticTest(); RunDynamicTest(); } static void RunStaticTest() { Console.WriteLine("-------------------------------------"); Console.WriteLine(" Serializing StaticallyBuiltClass..."); Console.WriteLine("-------------------------------------"); var stat = new StaticallyBuiltClass(); Serialize(stat.GetType(), stat); Console.WriteLine(); } static void RunDynamicTest() { Console.WriteLine("-------------------------------------"); Console.WriteLine(" Serializing DynamicallyBuiltClass..."); Console.WriteLine("-------------------------------------"); CSharpCodeProvider csProvider = new CSharpCodeProvider(new Dictionary<string, string> { { "CompilerVersion", "v3.5" } }); CompilerParameters csParams = new System.CodeDom.Compiler.CompilerParameters(); csParams.GenerateInMemory = true; csParams.GenerateExecutable = false; csParams.ReferencedAssemblies.Add("System.dll"); csParams.CompilerOptions = "/target:library"; StringBuilder classDef = new StringBuilder(); classDef.AppendLine("using System;"); classDef.AppendLine("using System.Collections.Generic;"); classDef.AppendLine(""); classDef.AppendLine("public class DynamicallyBuiltClass"); classDef.AppendLine("{"); classDef.AppendLine(" public class Item"); classDef.AppendLine(" {"); classDef.AppendLine(" public string Name { get; set; }"); classDef.AppendLine(" public int Value { get; set; }"); classDef.AppendLine(" }"); classDef.AppendLine(" private List<Item> values = new List<Item>();"); classDef.AppendLine(" public List<Item> Values { get { return values; } set { values = value; } }"); classDef.AppendLine("}"); CompilerResults res = csProvider.CompileAssemblyFromSource(csParams, new string[] { classDef.ToString() }); foreach (var line in res.Output) { Console.WriteLine(line); } Assembly asm = res.CompiledAssembly; if (asm != null) { Type t = asm.GetType("DynamicallyBuiltClass"); object o = t.InvokeMember("", BindingFlags.CreateInstance, null, null, null); Serialize(t, o); } Console.WriteLine(); } static void Serialize(Type type, object o) { var serializer = new XmlSerializer(type); try { serializer.Serialize(Console.Out, o); } catch(Exception ex) { Console.WriteLine("Exception caught while serializing " + type.ToString()); Exception e = ex; while (e != null) { Console.WriteLine(e.Message); e = e.InnerException; Console.Write("Inner: "); } Console.WriteLine("null"); Console.WriteLine(); Console.WriteLine("Stack trace:"); Console.WriteLine(ex.StackTrace); } } } which generates the following output: ------------------------------------- Serializing StaticallyBuiltClass... ------------------------------------- <?xml version="1.0" encoding="IBM437"?> <StaticallyBuiltClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Values /> </StaticallyBuiltClass> ------------------------------------- Serializing DynamicallyBuiltClass... ------------------------------------- Exception caught while serializing DynamicallyBuiltClass There was an error generating the XML document. Inner: The type initializer for 'Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterDynamicallyBuiltClass' threw an exception. Inner: Object reference not set to an instance of an object. Inner: null Stack trace: at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id) at System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o, XmlSerializerNamespaces namespaces) at System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o) at Program.Serialize(Type type, Object o) in c:\dev\SerTest\SerTest\Program.cs:line 100 Edit: Removed some extraneous referenced assemblies

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• C# UDP decoding datagrams fails randomly

  - by Tom Frey

  Hi, I'm experiencing an issue in a multi threaded application and have been debugging it for the last 3 days but for the life of it can not figure it out. I'm writing this, hoping that I either have a DUH moment when typing this or somebody sees something obvious in the code snippets I provide. Here's what's going on: I've been working on a new UDP networking library and have a data producer that multicasts UDP datagrams to several receiver applications. The sender sends on two different sockets that are bound to separate UDP multicast addresses and separate ports. The receiver application also creates two sockets and binds each one to one of the sender's multicast address/port. When the receiver receives the datagram, it copies it from the the buffer in a MemoryStream which is then put onto a thread safe queue, where another thread reads from it and decodes the data out of the MemoryStream. Both sockets have their own queues. What happens now is really weird, it happens randomly, non-reproducible and when I run multiple receiver applications, it only happens randomly on one of them every now and then. Basically, the thread that reads the MemoryStream out of the queue, reads it via a BinaryReader like ReadInt32(), etc. and thereby decodes the data. Every now and then however when it reads the data, the data it reads from it is incorrect, e.g. a negative integer number which the sender never would encode. However, as mentioned before, the decoding only fails in one of the receiver applications, in the other ones the datagram decodes fine. Now you might be saying, well, probably the UDP datagram has a byte corruption or something but I've logged every single datagram that's coming in and compared them on all receivers and the datagrams every application receives are absolutely identical. Now it gets even weirder, when I dump the datagram that failed to decode to disk and write a unit test that reads it and runs it through the decoder, it decodes just fine. Also when I wrap a try/catch around the decoder, reset the MemoryStream position in the catch and run it through the decoder again, it decodes just fine. To make it even weirder, this also only happens when I bind both sockets to read data from the sender, if I only bind one, it doesn't happen or at least I wasn't able to reproduce it. Here are is some corresponding code to what's going on: This is the receive callback for the socket: private void ReceiveCompleted(object sender, SocketAsyncEventArgs args) { if (args.SocketError != SocketError.Success) { InternalShutdown(args.SocketError); return; } if (args.BytesTransferred > SequencedUnitHeader.UNIT_HEADER_SIZE) { DataChunk chunk = new DataChunk(args.BytesTransferred); Buffer.BlockCopy(args.Buffer, 0, chunk.Buffer, 0, args.BytesTransferred); chunk.MemoryStream = new MemoryStream(chunk.Buffer); chunk.BinaryReader = new BinaryReader(chunk.MemoryStream); chunk.SequencedUnitHeader.SequenceID = chunk.BinaryReader.ReadUInt32(); chunk.SequencedUnitHeader.Count = chunk.BinaryReader.ReadByte(); if (prevSequenceID + 1 != chunk.SequencedUnitHeader.SequenceID) { log.Error("UdpDatagramGap\tName:{0}\tExpected:{1}\tReceived:{2}", unitName, prevSequenceID + 1, chunk.SequencedUnitHeader.SequenceID); } else if (chunk.SequencedUnitHeader.SequenceID < prevSequenceID) { log.Error("UdpOutOfSequence\tName:{0}\tExpected:{1}\tReceived:{2}", unitName, prevSequenceID + 1, chunk.SequencedUnitHeader.SequenceID); } prevSequenceID = chunk.SequencedUnitHeader.SequenceID; messagePump.Produce(chunk); } else UdpStatistics.FramesRxDiscarded++; Socket.InvokeAsyncMethod(Socket.ReceiveAsync, ReceiveCompleted, asyncReceiveArgs); } Here's some stub code that decodes the data: public static void OnDataChunk(DataChunk dataChunk) { try { for (int i = 0; i < dataChunk.SequencedUnitHeader.Count; i++) { int val = dataChunk.BinaryReader.ReadInt32(); if(val < 0) throw new Exception("EncodingException"); // do something with that value } } catch (Exception ex) { writer.WriteLine("ID:" + dataChunk.SequencedUnitHeader.SequenceID + " Count:" + dataChunk.SequencedUnitHeader.Count + " " + BitConverter.ToString(dataChunk.Buffer, 0, dataChunk.Size)); writer.Flush(); log.ErrorException("OnDataChunk", ex); log.Info("RETRY FRAME:{0} Data:{1}", dataChunk.SequencedUnitHeader.SequenceID, BitConverter.ToString(dataChunk.Buffer, 0, dataChunk.Size)); dataChunk.MemoryStream.Position = 0; dataChunk.SequencedUnitHeader.SequenceID = dataChunk.BinaryReader.ReadUInt32(); dataChunk.SequencedUnitHeader.Count = dataChunk.BinaryReader.ReadByte(); OnDataChunk(dataChunk); } } You see in the catch{} part I simply reset the MemoryStream.Position to 0 and call the same method again and it works just fine that next time? I'm really out of ideas at this point and unfortunately had no DUH moment writing this. Anybody have any kind of idea what might be going on or what else I could do to troubleshoot this? Thanks, Tom

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• Architecture choice about representation of collections in Business Objects

  - by Rajarshi

  I have made certain choices in my architecture which I request the community to review and comment. I am breaking up the post in smaller sections to make it easier to understand the context and then suggest/comment. I am sorry that the post is long, but is required to explain the context. What am I building A typical business application where there are application users, security roles, business operation/action rights based on roles and several business modules like Stock Receive, Stock Transfer, Sale Order, Sale Invoice, Sale Return, Stock Audit etc. and several reports. The application is a WinForm application since it has a lot of rich and responsive UI requirements and has to operate in disconnected mode (with a local SQL Server), most of the time. What have I done I have built a framework - nothing to boast about, but just a set of libraries that serves the repetative requirements of my application, e.g. authentication, role based authorization, data access, validation, exception handling, logging, change status tracking, presentation model compliance and reasonable loose coupling between components. No, I have not written everything from scratch, you can say I have consolidated many things together like some concepts from CSLA, Martin Fowler for Presentation Model, blocks from Enterprise Library, Unity etc. to build a set of libraries that will help my developers be productive quickly without having to look up Google for many of the technical requirements. I have tried to keep the framework generic so that it can be used in typical business applications and also tried to follow some best practices that will support the same Business Objects to be used in an ASP.NET MVC environment also. My present architecture serves my objectives well, and have built several modules (on WinForm) without much trouble. The architecture also lent itself well to build some usable prototype on ASP.NET MVC with the same set of business objects, without changing a single line of code. My Dilemma I have used Custom Business Objects since that gives me a clearer OOP representation of the problem scope in my solution scope, and helps me visualize my entire solution as collection of objects with data and behavior rather than having a set of relational data (DataSet) and implement behaviours (business logic, validation) etc. separately. With rich databinding support in .NET 2.0 binding Custom Business Objects to UI was a breeze. Now while building my business objects, I am still in a dilemma about representation of collections in business objects. Currently I am using DataSets to represent collections while I have seen many suggestions to implement custom collections. For example, in my vision, a typical Sale Invoice Object will contain 'Sales Invoice Items' as a collection. Now theoritically, I can accept that the each 'Sales Invoice Item' should have its own behavior along with their data (ItemCode, Name, Qty, Price etc.) but typically managing of Sale Invoice Items in a Sale Invoice is handled by the Sale Invoice Object itself, e.g. adding/removing Items from collection. Additionally, we can also put business logic/rules for the Sales Invoice Items like "Qty should not be greater than the ordered qty", "Price should be max 10% above the price in Sale Order" etc. in the Sale Invoice object itself. With that kind of a vision, I felt that most business object child collections can be managed by the parent itself, including add/remove from collection as well and implementing business logic for the collection items, hence the collection items hold nothing but data. Additionally, typical collections are represented in UI in Grids, where ability to support DataBinding becomes very important for any collection. Implementing a custom collection, in that case would also mean, I have to implement robust DataBinding support as well, for the collection, which is of course time consuming. Now, considering child collection behaviors are implemented in the parent and the need for DataBinding of child collections, I chose DataSet to represent any child collection in my business objects. In the above example of Sale Invoice I will have 'Invoice Number', 'Date', 'Customer' etc. as attributes of the 'Sale Invoice' but 'InvoiceItems' as a DataSet. Of course, when I say DataSet, it is not a vanilla dataset but an extended DataSet that supports business rule validation and the same role based security model of my framework to allow/deny any business operation to rows/columns of the DataSet, automatically. This approach has allowed easier collection management and databinding in my business objects and my developers are able to deliver modules rapidly. Questions Do you feel that the approach is reasonable? Do you see any shortcomings of this approach? I am recently thinking of using 'Typed DataSets' as child collections, for easier representation in code, that will allow me to write 'currentInvoice.InvoiceItems' (for the DataTable) and 'invoiceItem.ProductCode' or 'invoiceItem.Qty', instead of 'drow["ProductCode"].ToString()' or '(int)drow["Qty"]' etc. Does this choice have any demerits? Thank you if you have read so far and a salute if you still have the Energy to answer.

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• Render To Texture Using OpenGL is not working but normal rendering works just fine

  - by Franky Rivera

  things I initialize at the beginning of the program I realize not all of these pertain to my issue I just copy and pasted what I had //overall initialized //things openGL related I initialize earlier on in the project glClearColor( 0.0f, 0.0f, 0.0f, 1.0f ); glClearDepth( 1.0f ); glEnable(GL_ALPHA_TEST); glEnable( GL_STENCIL_TEST ); glEnable(GL_DEPTH_TEST); glDepthFunc( GL_LEQUAL ); glEnable(GL_CULL_FACE); glFrontFace( GL_CCW ); glEnable(GL_COLOR_MATERIAL); glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ); //we also initialize our shader programs //(i added some shader program functions for definitions) //this enum list is else where in code //i figured it would help show you guys more about my //shader compile creation function right under this enum list VVVVVV /*enum eSHADER_ATTRIB_LOCATION { VERTEX_ATTRIB = 0, NORMAL_ATTRIB = 2, COLOR_ATTRIB, COLOR2_ATTRIB, FOG_COORD, TEXTURE_COORD_ATTRIB0 = 8, TEXTURE_COORD_ATTRIB1, TEXTURE_COORD_ATTRIB2, TEXTURE_COORD_ATTRIB3, TEXTURE_COORD_ATTRIB4, TEXTURE_COORD_ATTRIB5, TEXTURE_COORD_ATTRIB6, TEXTURE_COORD_ATTRIB7 }; */ //if we fail making our shader leave if( !testShader.CreateShader( "SimpleShader.vp", "SimpleShader.fp", 3, VERTEX_ATTRIB, "vVertexPos", NORMAL_ATTRIB, "vNormal", TEXTURE_COORD_ATTRIB0, "vTexCoord" ) ) return false; if( !testScreenShader.CreateShader( "ScreenShader.vp", "ScreenShader.fp", 3, VERTEX_ATTRIB, "vVertexPos", NORMAL_ATTRIB, "vNormal", TEXTURE_COORD_ATTRIB0, "vTexCoord" ) ) return false; SHADER PROGRAM FUNCTIONS bool CShaderProgram::CreateShader( const char* szVertexShaderName, const char* szFragmentShaderName, ... ) { //here are our handles for the openGL shaders int iGLVertexShaderHandle = -1, iGLFragmentShaderHandle = -1; //get our shader data char *vData = 0, *fData = 0; int vLength = 0, fLength = 0; LoadShaderFile( szVertexShaderName, &vData, &vLength ); LoadShaderFile( szFragmentShaderName, &fData, &fLength ); //data if( !vData ) return false; //data if( !fData ) { delete[] vData; return false; } //create both our shader objects iGLVertexShaderHandle = glCreateShader( GL_VERTEX_SHADER ); iGLFragmentShaderHandle = glCreateShader( GL_FRAGMENT_SHADER ); //well we got this far so we have dynamic data to clean up //load vertex shader glShaderSource( iGLVertexShaderHandle, 1, (const char**)(&vData), &vLength ); //load fragment shader glShaderSource( iGLFragmentShaderHandle, 1, (const char**)(&fData), &fLength ); //we are done with our data delete it delete[] vData; delete[] fData; //compile them both glCompileShader( iGLVertexShaderHandle ); //get shader status int iShaderOk; glGetShaderiv( iGLVertexShaderHandle, GL_COMPILE_STATUS, &iShaderOk ); if( iShaderOk == GL_FALSE ) { char* buffer; //get what happend with our shader glGetShaderiv( iGLVertexShaderHandle, GL_INFO_LOG_LENGTH, &iShaderOk ); buffer = new char[iShaderOk]; glGetShaderInfoLog( iGLVertexShaderHandle, iShaderOk, NULL, buffer ); //sprintf_s( buffer, "Failure Our Object For %s was not created", szFileName ); MessageBoxA( NULL, buffer, szVertexShaderName, MB_OK ); //delete our dynamic data free( buffer ); glDeleteShader(iGLVertexShaderHandle); return false; } glCompileShader( iGLFragmentShaderHandle ); //get shader status glGetShaderiv( iGLFragmentShaderHandle, GL_COMPILE_STATUS, &iShaderOk ); if( iShaderOk == GL_FALSE ) { char* buffer; //get what happend with our shader glGetShaderiv( iGLFragmentShaderHandle, GL_INFO_LOG_LENGTH, &iShaderOk ); buffer = new char[iShaderOk]; glGetShaderInfoLog( iGLFragmentShaderHandle, iShaderOk, NULL, buffer ); //sprintf_s( buffer, "Failure Our Object For %s was not created", szFileName ); MessageBoxA( NULL, buffer, szFragmentShaderName, MB_OK ); //delete our dynamic data free( buffer ); glDeleteShader(iGLFragmentShaderHandle); return false; } //lets check to see if the fragment shader compiled int iCompiled = 0; glGetShaderiv( iGLVertexShaderHandle, GL_COMPILE_STATUS, &iCompiled ); if( !iCompiled ) { //this shader did not compile leave return false; } //lets check to see if the fragment shader compiled glGetShaderiv( iGLFragmentShaderHandle, GL_COMPILE_STATUS, &iCompiled ); if( !iCompiled ) { char* buffer; //get what happend with our shader glGetShaderiv( iGLFragmentShaderHandle, GL_INFO_LOG_LENGTH, &iShaderOk ); buffer = new char[iShaderOk]; glGetShaderInfoLog( iGLFragmentShaderHandle, iShaderOk, NULL, buffer ); //sprintf_s( buffer, "Failure Our Object For %s was not created", szFileName ); MessageBoxA( NULL, buffer, szFragmentShaderName, MB_OK ); //delete our dynamic data free( buffer ); glDeleteShader(iGLFragmentShaderHandle); return false; } //make our new shader program m_iShaderProgramHandle = glCreateProgram(); glAttachShader( m_iShaderProgramHandle, iGLVertexShaderHandle ); glAttachShader( m_iShaderProgramHandle, iGLFragmentShaderHandle ); glLinkProgram( m_iShaderProgramHandle ); int iLinked = 0; glGetProgramiv( m_iShaderProgramHandle, GL_LINK_STATUS, &iLinked ); if( !iLinked ) { //we didn't link return false; } //NOW LETS CREATE ALL OUR HANDLES TO OUR PROPER LIKING //start from this parameter va_list parseList; va_start( parseList, szFragmentShaderName ); //read in number of variables if any unsigned uiNum = 0; uiNum = va_arg( parseList, unsigned ); //for loop through our attribute pairs int enumType = 0; for( unsigned x = 0; x < uiNum; ++x ) { //specify our attribute locations enumType = va_arg( parseList, int ); char* name = va_arg( parseList, char* ); glBindAttribLocation( m_iShaderProgramHandle, enumType, name ); } //end our list parsing va_end( parseList ); //relink specify //we have custom specified our attribute locations glLinkProgram( m_iShaderProgramHandle ); //fill our handles InitializeHandles( ); //everything went great return true; } void CShaderProgram::InitializeHandles( void ) { m_uihMVP = glGetUniformLocation( m_iShaderProgramHandle, "mMVP" ); m_uihWorld = glGetUniformLocation( m_iShaderProgramHandle, "mWorld" ); m_uihView = glGetUniformLocation( m_iShaderProgramHandle, "mView" ); m_uihProjection = glGetUniformLocation( m_iShaderProgramHandle, "mProjection" ); ///////////////////////////////////////////////////////////////////////////////// //texture handles m_uihDiffuseMap = glGetUniformLocation( m_iShaderProgramHandle, "diffuseMap" ); if( m_uihDiffuseMap != -1 ) { //store what texture index this handle will be in the shader glUniform1i( m_uihDiffuseMap, RM_DIFFUSE+GL_TEXTURE0 ); (0)+ } m_uihNormalMap = glGetUniformLocation( m_iShaderProgramHandle, "normalMap" ); if( m_uihNormalMap != -1 ) { //store what texture index this handle will be in the shader glUniform1i( m_uihNormalMap, RM_NORMAL+GL_TEXTURE0 ); (1)+ } } void CShaderProgram::SetDiffuseMap( const unsigned& uihDiffuseMap ) { (0)+ glActiveTexture( RM_DIFFUSE+GL_TEXTURE0 ); glBindTexture( GL_TEXTURE_2D, uihDiffuseMap ); } void CShaderProgram::SetNormalMap( const unsigned& uihNormalMap ) { (1)+ glActiveTexture( RM_NORMAL+GL_TEXTURE0 ); glBindTexture( GL_TEXTURE_2D, uihNormalMap ); } //MY 2 TEST SHADERS also my math order is correct it pertains to my matrix ordering in my math library once again i've tested the basic rendering. rendering to the screen works fine ----------------------------------------SIMPLE SHADER------------------------------------- //vertex shader looks like this #version 330 in vec3 vVertexPos; in vec3 vNormal; in vec2 vTexCoord; uniform mat4 mWorld; // Model Matrix uniform mat4 mView; // Camera View Matrix uniform mat4 mProjection;// Camera Projection Matrix out vec2 vTexCoordVary; // Texture coord to the fragment program out vec3 vNormalColor; void main( void ) { //pass the texture coordinate vTexCoordVary = vTexCoord; vNormalColor = vNormal; //calculate our model view projection matrix mat4 mMVP = (( mWorld * mView ) * mProjection ); //result our position gl_Position = vec4( vVertexPos, 1 ) * mMVP; } //fragment shader looks like this #version 330 in vec2 vTexCoordVary; in vec3 vNormalColor; uniform sampler2D diffuseMap; uniform sampler2D normalMap; out vec4 fragColor[2]; void main( void ) { //CORRECT fragColor[0] = texture( normalMap, vTexCoordVary ); fragColor[1] = vec4( vNormalColor, 1.0 ); }; ----------------------------------------SCREEN SHADER------------------------------------- //vertext shader looks like this #version 330 in vec3 vVertexPos; // This is the position of the vertex coming in in vec2 vTexCoord; // This is the texture coordinate.... out vec2 vTexCoordVary; // Texture coord to the fragment program void main( void ) { vTexCoordVary = vTexCoord; //set our position gl_Position = vec4( vVertexPos.xyz, 1.0f ); } //fragment shader looks like this #version 330 in vec2 vTexCoordVary; // Incoming "varying" texture coordinate uniform sampler2D diffuseMap;//the tile detail texture uniform sampler2D normalMap; //the normal map from earlier out vec4 vTheColorOfThePixel; void main( void ) { //CORRECT vTheColorOfThePixel = texture( normalMap, vTexCoordVary ); }; .Class RenderTarget Main Functions //here is my render targets create function bool CRenderTarget::Create( const unsigned uiNumTextures, unsigned uiWidth, unsigned uiHeight, int iInternalFormat, bool bDepthWanted ) { if( uiNumTextures <= 0 ) return false; //generate our variables glGenFramebuffers(1, &m_uifboHandle); // Initialize FBO glBindFramebuffer(GL_FRAMEBUFFER, m_uifboHandle); m_uiNumTextures = uiNumTextures; if( bDepthWanted ) m_uiNumTextures += 1; m_uiTextureHandle = new unsigned int[uiNumTextures]; glGenTextures( uiNumTextures, m_uiTextureHandle ); for( unsigned x = 0; x < uiNumTextures-1; ++x ) { glBindTexture( GL_TEXTURE_2D, m_uiTextureHandle[x]); // Reserve space for our 2D render target glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexImage2D(GL_TEXTURE_2D, 0, iInternalFormat, uiWidth, uiHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL); glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + x, GL_TEXTURE_2D, m_uiTextureHandle[x], 0); } //if we need one for depth testing if( bDepthWanted ) { glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, m_uiTextureHandle[uiNumTextures-1], 0); glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_uiTextureHandle[uiNumTextures-1], 0);*/ // Must attach texture to framebuffer. Has Stencil and depth glBindRenderbuffer(GL_RENDERBUFFER, m_uiTextureHandle[uiNumTextures-1]); glRenderbufferStorage(GL_RENDERBUFFER, /*GL_DEPTH_STENCIL*/GL_DEPTH24_STENCIL8, TEXTURE_WIDTH, TEXTURE_HEIGHT ); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_uiTextureHandle[uiNumTextures-1]); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, m_uiTextureHandle[uiNumTextures-1]); } glBindFramebuffer(GL_FRAMEBUFFER, 0); //everything went fine return true; } void CRenderTarget::Bind( const int& iTargetAttachmentLoc, const unsigned& uiWhichTexture, const bool bBindFrameBuffer ) { if( bBindFrameBuffer ) glBindFramebuffer( GL_FRAMEBUFFER, m_uifboHandle ); if( uiWhichTexture < m_uiNumTextures ) glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + iTargetAttachmentLoc, m_uiTextureHandle[uiWhichTexture], 0); } void CRenderTarget::UnBind( void ) { //default our binding glBindFramebuffer( GL_FRAMEBUFFER, 0 ); } //this is all in a test project so here's my straight forward rendering function for testing this render function does basic rendering steps keep in mind i have already tested my textures i have already tested my box thats being rendered all basic rendering works fine its just when i try to render to a texture then display it in a render surface that it does not work. Also I have tested my render surface it is bound exactly to the screen coordinate space void TestRenderSteps( void ) { //Clear the color and the depth glClearColor( 0.0f, 0.0f, 0.0f, 1.0f ); glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); //bind the shader program glUseProgram( testShader.m_iShaderProgramHandle ); //1) grab the vertex buffer related to our rendering glBindBuffer( GL_ARRAY_BUFFER, CVertexBufferManager::GetInstance()->GetPositionNormalTexBuffer().GetBufferHandle() ); //2) how our stream will be split here ( 4 bytes position, ..ext ) CVertexBufferManager::GetInstance()->GetPositionNormalTexBuffer().MapVertexStride(); //3) set the index buffer if needed glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, CIndexBuffer::GetInstance()->GetBufferHandle() ); //send the needed information into the shader testShader.SetWorldMatrix( boxPosition ); testShader.SetViewMatrix( Static_Camera.GetView( ) ); testShader.SetProjectionMatrix( Static_Camera.GetProjection( ) ); testShader.SetDiffuseMap( iTextureID ); testShader.SetNormalMap( iTextureID2 ); GLenum buffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 }; glDrawBuffers(2, buffers); //bind to our render target //RM_DIFFUSE, RM_NORMAL are enums (0 && 1) renderTarget.Bind( RM_DIFFUSE, 1, true ); renderTarget.Bind( RM_NORMAL, 1, false); //false because buffer is already bound //i clear here just to clear the texture to make it a default value of white //by doing this i can see if what im rendering to my screen is just drawing to the screen //or if its my render target defaulted glClearColor( 1.0f, 1.0f, 1.0f, 1.0f ); glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); //i have this box object which i draw testBox.Draw(); //the draw call looks like this //my normal rendering works just fine so i know this draw is fine // glDrawElementsBaseVertex( m_sides[x].GetPrimitiveType(), // m_sides[x].GetPrimitiveCount() * 3, // GL_UNSIGNED_INT, // BUFFER_OFFSET(sizeof(unsigned int) * m_sides[x].GetStartIndex()), // m_sides[x].GetStartVertex( ) ); //we unbind the target back to default renderTarget.UnBind(); //i stop mapping my vertex format CVertexBufferManager::GetInstance()->GetPositionNormalTexBuffer().UnMapVertexStride(); //i go back to default in using no shader program glUseProgram( 0 ); //now that everything is drawn to the textures //lets draw our screen surface and pass it our 2 filled out textures //NOW RENDER THE TEXTURES WE COLLECTED TO THE SCREEN QUAD //bind the shader program glUseProgram( testScreenShader.m_iShaderProgramHandle ); //1) grab the vertex buffer related to our rendering glBindBuffer( GL_ARRAY_BUFFER, CVertexBufferManager::GetInstance()->GetPositionTexBuffer().GetBufferHandle() ); //2) how our stream will be split here CVertexBufferManager::GetInstance()->GetPositionTexBuffer().MapVertexStride(); //3) set the index buffer if needed glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, CIndexBuffer::GetInstance()->GetBufferHandle() ); //pass our 2 filled out textures (in the shader im just using the diffuse //i wanted to see if i was rendering anything before i started getting into other techniques testScreenShader.SetDiffuseMap( renderTarget.GetTextureHandle(0) ); //SetDiffuseMap definitions in shader program class testScreenShader.SetNormalMap( renderTarget.GetTextureHandle(1) ); //SetNormalMap definitions in shader program class //DO the draw call drawing our screen rectangle glDrawElementsBaseVertex( m_ScreenRect.GetPrimitiveType(), m_ScreenRect.GetPrimitiveCount() * 3, GL_UNSIGNED_INT, BUFFER_OFFSET(sizeof(unsigned int) * m_ScreenRect.GetStartIndex()), m_ScreenRect.GetStartVertex( ) );*/ //unbind our vertex mapping CVertexBufferManager::GetInstance()->GetPositionTexBuffer().UnMapVertexStride(); //default to no shader program glUseProgram( 0 ); } Last words: 1) I can render my box just fine 2) i can render my screen rect just fine 3) I cannot render my box into a texture then display it into my screen rect 4) This entire project is just a test project I made to test different rendering practices. So excuse any "ugly-ish" unclean code. This was made just on a fly run through when I was trying new test cases.

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• Working with Tile Notifications in Windows 8 Store Apps – Part I

  - by dwahlin

  One of the features that really makes Windows 8 apps stand out from others is the tile functionality on the start screen. While icons allow a user to start an application, tiles provide a more engaging way to engage the user and draw them into an application. Examples of “live” tiles on part of my current start screen are shown next: I’ll admit that if you get enough of these tiles going the start screen can actually be a bit distracting. Fortunately, a user can easily disable a live tile by right-clicking on it or pressing and holding a tile on a touch device and then selecting Turn live tile off from the AppBar: The can also make a wide tile smaller (into a square tile) or make a square tile bigger assuming the application supports both squares and rectangles. In this post I’ll walk through how to add tile notification functionality into an application. Both XAML/C# and HTML/JavaScript apps support live tiles and I’ll show the code for both options.   Understanding Tile Templates The first thing you need to know if you want to add custom tile functionality (live tiles) into your application is that there is a collection of tile templates available out-of-the-box. Each tile template has XML associated with it that you need to load, update with your custom data, and then feed into a tile update manager. By doing that you can control what shows in your app’s tile on the Windows 8 start screen. So how do you learn more about the different tile templates and their respective XML? Fortunately, Microsoft has a nice documentation page in the Windows 8 Store SDK. Visit http://msdn.microsoft.com/en-us/library/windows/apps/hh761491.aspx to see a complete list of square and wide/rectangular tile templates that you can use. Looking through the templates you’ll It has the following XML template associated with it:  <tile> <visual> <binding template="TileSquareBlock"> <text id="1">Text Field 1</text> <text id="2">Text Field 2</text> </binding> </visual> </tile> An example of a wide/rectangular tile template is shown next:    <tile> <visual> <binding template="TileWideImageAndText01"> <image id="1" src="image1.png" alt="alt text"/> <text id="1">Text Field 1</text> </binding> </visual> </tile>   To use these tile templates (or others you find interesting), update their content, and get them to show for your app’s tile on the Windows 8 start screen you’ll need to perform the following steps: Define the tile template to use in your app Load the tile template’s XML into memory Modify the children of the <binding> tag Feed the modified tile XML into a new TileNotification instance Feed the TileNotification instance into the Update() method of the TileUpdateManager In the remainder of the post I’ll walk through each of the steps listed above to provide wide and square tile notifications for an application. The wide tile that’s shown will show an image and text while the square tile will only show text. If you’re going to provide custom tile notifications it’s recommended that you provide wide and square tiles since users can switch between the two of them directly on the start screen. Note: When working with tile notifications it’s possible to manipulate and update a tile’s XML template without having to know XML parsing techniques. This can be accomplished using some C# notification extension classes that are available. In this post I’m going to focus on working with tile notifications using an XML parser so that the focus is on the steps required to add notifications to the Windows 8 start screen rather than on external extension classes. You can access the extension classes in the Windows 8 samples gallery if you’re interested.   Steps to Create Custom App Tile Notifications   Step 1: Define the tile template to use in your app Although you can cut-and-paste a tile template’s XML directly into your C# or HTML/JavaScript Windows store app and then parse it using an XML parser, it’s easier to use the built-in TileTemplateType enumeration from the Windows.UI.Notifications namespace. It provides direct access to the XML for the various templates so once you locate a template you like in the documentation (mentioned above), simplify reference it:HTML/JavaScript var notifications = Windows.UI.Notifications; var template = notifications.TileTemplateType.tileWideImageAndText01; .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   XAML/C# var template = TileTemplateType.TileWideImageAndText01;   Step 2: Load the tile template’s XML into memory Once the target template’s XML is identified, load it into memory using the TileUpdateManager’s GetTemplateContent() method. This method parses the template XML and returns an XmlDocument object:   HTML/JavaScript   var tileXml = notifications.TileUpdateManager.getTemplateContent(template); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   XAML/C#  var tileXml = TileUpdateManager.GetTemplateContent(template);   Step 3: Modify the children of the <binding> tag Once the XML for a given template is loaded into memory you need to locate the appropriate <image> and/or <text> elements in the XML and update them with your app data. This can be done using standard XML DOM manipulation techniques. The example code below locates the image folder and loads the path to an image file located in the project into it’s inner text. The code also creates a square tile that consists of text, updates it’s <text> element, and then imports and appends it into the wide tile’s XML.   HTML/JavaScript var image = tileXml.selectSingleNode('//image[@id="1"]'); image.setAttribute('src', 'ms-appx:///images/' + imageFile); image.setAttribute('alt', 'Live Tile'); var squareTemplate = notifications.TileTemplateType.tileSquareText04; var squareTileXml = notifications.TileUpdateManager.getTemplateContent(squareTemplate); var squareTileTextAttributes = squareTileXml.selectSingleNode('//text[@id="1"]'); squareTileTextAttributes.appendChild(squareTileXml.createTextNode(content)); var node = tileXml.importNode(squareTileXml.selectSingleNode('//binding'), true); tileXml.selectSingleNode('//visual').appendChild(node); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   XAML/C#var tileXml = TileUpdateManager.GetTemplateContent(template); var text = tileXml.SelectSingleNode("//text[@id='1']"); text.AppendChild(tileXml.CreateTextNode(content)); var image = (XmlElement)tileXml.SelectSingleNode("//image[@id='1']"); image.SetAttribute("src", "ms-appx:///Assets/" + imageFile); image.SetAttribute("alt", "Live Tile"); Debug.WriteLine(image.GetXml()); var squareTemplate = TileTemplateType.TileSquareText04; var squareTileXml = TileUpdateManager.GetTemplateContent(squareTemplate); var squareTileTextAttributes = squareTileXml.SelectSingleNode("//text[@id='1']"); squareTileTextAttributes.AppendChild(squareTileXml.CreateTextNode(content)); var node = tileXml.ImportNode(squareTileXml.SelectSingleNode("//binding"), true); tileXml.SelectSingleNode("//visual").AppendChild(node);  Step 4: Feed the modified tile XML into a new TileNotification instance Now that the XML data has been updated with the desired text and images, it’s time to load the XmlDocument object into a new TileNotification instance:   HTML/JavaScript var tileNotification = new notifications.TileNotification(tileXml); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   XAML/C#var tileNotification = new TileNotification(tileXml);  Step 5: Feed the TileNotification instance into the Update() method of the TileUpdateManager Once the TileNotification instance has been created and the XmlDocument has been passed to its constructor, it needs to be passed to the Update() method of a TileUpdator in order to be shown on the Windows 8 start screen:   HTML/JavaScript notifications.TileUpdateManager.createTileUpdaterForApplication().update(tileNotification); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   XAML/C#TileUpdateManager.CreateTileUpdaterForApplication().Update(tileNotification);    Once the tile notification is updated it’ll show up on the start screen. An example of the wide and square tiles created with the included demo code are shown next:     Download the HTML/JavaScript and XAML/C# sample application here. In the next post in this series I’ll walk through how to queue multiple tiles and clear a queue.

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• Confusion testing fftw3 - poisson equation 2d test

  - by user3699736

  I am having trouble explaining/understanding the following phenomenon: To test fftw3 i am using the 2d poisson test case: laplacian(f(x,y)) = - g(x,y) with periodic boundary conditions. After applying the fourier transform to the equation we obtain : F(kx,ky) = G(kx,ky) /(kx² + ky²) (1) if i take g(x,y) = sin (x) + sin(y) , (x,y) \in [0,2 \pi] i have immediately f(x,y) = g(x,y) which is what i am trying to obtain with the fft : i compute G from g with a forward Fourier transform From this i can compute the Fourier transform of f with (1). Finally, i compute f with the backward Fourier transform (without forgetting to normalize by 1/(nx*ny)). In practice, the results are pretty bad? (For instance, the amplitude for N = 256 is twice the amplitude obtained with N = 512) Even worse, if i try g(x,y) = sin(x)*sin(y) , the curve has not even the same form of the solution. (note that i must change the equation; i divide by two the laplacian in this case : (1) becomes F(kx,ky) = 2*G(kx,ky)/(kx²+ky²) Here is the code: /* * fftw test -- double precision */ #include <iostream> #include <stdio.h> #include <stdlib.h> #include <math.h> #include <fftw3.h> using namespace std; int main() { int N = 128; int i, j ; double pi = 3.14159265359; double *X, *Y ; X = (double*) malloc(N*sizeof(double)); Y = (double*) malloc(N*sizeof(double)); fftw_complex *out1, *in2, *out2, *in1; fftw_plan p1, p2; double L = 2.*pi; double dx = L/((N - 1)*1.0); in1 = (fftw_complex*) fftw_malloc(sizeof(fftw_complex)*(N*N) ); out2 = (fftw_complex*) fftw_malloc(sizeof(fftw_complex)*(N*N) ); out1 = (fftw_complex*) fftw_malloc(sizeof(fftw_complex)*(N*N) ); in2 = (fftw_complex*) fftw_malloc(sizeof(fftw_complex)*(N*N) ); p1 = fftw_plan_dft_2d(N, N, in1, out1, FFTW_FORWARD,FFTW_MEASURE ); p2 = fftw_plan_dft_2d(N, N, in2, out2, FFTW_BACKWARD,FFTW_MEASURE); for(i = 0; i < N; i++){ X[i] = -pi + (i*1.0)*2.*pi/((N - 1)*1.0) ; for(j = 0; j < N; j++){ Y[j] = -pi + (j*1.0)*2.*pi/((N - 1)*1.0) ; in1[i*N + j][0] = sin(X[i]) + sin(Y[j]) ; // row major ordering //in1[i*N + j][0] = sin(X[i]) * sin(Y[j]) ; // 2nd test case in1[i*N + j][1] = 0 ; } } fftw_execute(p1); // FFT forward for ( i = 0; i < N; i++){ // f = g / ( kx² + ky² ) for( j = 0; j < N; j++){ in2[i*N + j][0] = out1[i*N + j][0]/ (i*i+j*j+1e-16); in2[i*N + j][1] = out1[i*N + j][1]/ (i*i+j*j+1e-16); //in2[i*N + j][0] = 2*out1[i*N + j][0]/ (i*i+j*j+1e-16); // 2nd test case //in2[i*N + j][1] = 2*out1[i*N + j][1]/ (i*i+j*j+1e-16); } } fftw_execute(p2); //FFT backward // checking the results computed double erl1 = 0.; for ( i = 0; i < N; i++) { for( j = 0; j < N; j++){ erl1 += fabs( in1[i*N + j][0] - out2[i*N + j][0]/N/N )*dx*dx; cout<< i <<" "<< j<<" "<< sin(X[i])+sin(Y[j])<<" "<< out2[i*N+j][0]/N/N <<" "<< endl; // > output } } cout<< erl1 << endl ; // L1 error fftw_destroy_plan(p1); fftw_destroy_plan(p2); fftw_free(out1); fftw_free(out2); fftw_free(in1); fftw_free(in2); return 0; } I can't find any (more) mistakes in my code (i installed the fftw3 library last week) and i don't see a problem with the maths either but i don't think it's the fft's fault. Hence my predicament. I am all out of ideas and all out of google as well. Any help solving this puzzle would be greatly appreciated. note : compiling : g++ test.cpp -lfftw3 -lm executing : ./a.out output and i use gnuplot in order to plot the curves : (in gnuplot ) splot "output" u 1:2:4 ( for the computed solution )

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• OSX launchd plist for node forever process

  - by lostintranslation

  I am trying to write a launchd.plist file for my node server. I am using forever to run my node server. I would like the server to start on boot. I would also like to wait for the mongodb launchd plist to run first. I installed mongobb using homebrew and it came with a launchd.plist already. I have executed the following: $ launchctl load ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist plist for mongodb is: <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Label</key> <string>homebrew.mxcl.mongodb</string> <key>ProgramArguments</key> <array> <string>/usr/local/opt/mongodb/mongod</string> <string>run</string> <string>--config</string> <string>/usr/local/etc/mongod.conf</string> </array> <key>RunAtLoad</key> <true/> <key>KeepAlive</key> <false/> <key>WorkingDirectory</key> <string>/usr/local</string> <key>StandardErrorPath</key> <string>/usr/local/var/log/mongodb/output.log</string> <key>StandardOutPath</key> <string>/usr/local/var/log/mongodb/output.log</string> <key>HardResourceLimits</key> <dict> <key>NumberOfFiles</key> <integer>1024</integer> </dict> <key>SoftResourceLimits</key> <dict> <key>NumberOfFiles</key> <integer>1024</integer> </dict> </dict> </plist> If I shutdown the computer and restart mongodb fires up as it should. However my node server is not starting. Any ideas? <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>KeepAlive</key> <dict> <key>SuccessfulExit</key> <false/> </dict> <key>Label</key> <string>com.test.app</string> <key>ProgramArguments</key> <array> <string>/usr/local/bin/forever</string> <string>-a</string> <string>-l</string> <string>/var/log/app/app.log</string> <string>-e</string> <string>/var/log/app/app_error.log</string> <string>/data/server/app.js</string> </array> <key>RunAtLoad</key> <true/> <key>StartInterval</key> <integer>3600</integer> </dict> </plist> EDIT: writing to log file and I see this: env: node: No such file or directory I think this means that the node binary cannot be found. I can echo $PATH and /usr/local/bin is in my path. I can start node from the terminal. Ideas?

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• Changing name attr of cloned input element in jQuery doesn't work in IE6/7

  - by BalusC

  This SSCCE says it all: <!doctype html> <html lang="en"> <head> <title>Test</title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function() { $('#add').click(function() { var ul = $('#ul'); var liclone = ul.find('li:last').clone(true); var input = liclone.find('input'); input.attr('name', input.attr('name').replace(/(foo\[)(\d+)(\])/, function(f, p1, p2, p3) { return p1 + (parseInt(p2) + 1) + p3; })); liclone.appendTo(ul); $('#showsource').text(ul.html()); }); }); </script> </head> <body> <ul id="ul"> <li><input type="text" name="foo[0]"></li> </ul> <button id="add">Add</button> <pre id="showsource"></pre> </body> </html> Copy'n'paste'n'run it, click the Add button several times. On every click you should see the HTML code of the <ul> to show up in the <pre id="showsource"> and the expected code should roughly be: <li><input name="foo[0]" type="text"></li> <li><input name="foo[1]" type="text"></li> <li><input name="foo[2]" type="text"></li> <li><input name="foo[3]" type="text"></li> This works as expected in FF, Chrome, Safari, Opera and IE8. However, IE6/7 fails in changing the name attribute and produces like: <li><input name="foo[0]" type="text"> <li><input name="foo[0]" type="text"> <li><input name="foo[0]" type="text"> <li><input name="foo[0]" type="text"></li> I googled a bit and found this very similar problem, he fixed it and posted a code snippet how it should have look like. Unfortunately this is exactly what I already have done, so I suspect that he was only testing in IE8, not in IE6/7. Other than that particular topic Google didn't reveal much. Any insights? Or do I really have to grab back to document.createElement? Note: I know that I can use just the same name for each input element and retrieve them as an array, but the above is just a basic example, in real I really need to have the name attribute changed, because it not only contains the index, but also other information such as parentindex, ordering, etc. It's been used to add/rearrange/remove (sub)menu items. Edit: this is related to this bug, The jQuery (I'm using 1.3.2) does thus not seem to create inputs that way? The following does just work: $('#add').click(function() { var ul = $('#ul'); var liclone = ul.find('li:last').clone(true); var oldinput = liclone.find('input'); var name = oldinput.attr('name').replace(/(foo\[)(\d+)(\])/, function(f, p1, p2, p3) { return p1 + (parseInt(p2) + 1) + p3; }); var newinput = $('<input name="' + name + '">'); oldinput.replaceWith(newinput); liclone.appendTo(ul); $('#showsource').text(ul.html()); }); But I can't imagine that I am the only one who encountered this problem with jQuery. Even a simple $('<input>').attr('name', 'foo') doesn't work in IE6/7. Isn't jQuery as being a crossbrowser library supposed to cover this particular issue under the hoods?

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• How to add correct cancellation when downloading a file with the example in the samples of the new P

  - by Mike

  Hello everybody, I have downloaded the last samples of the Parallel Programming team, and I don't succeed in adding correctly the possibility to cancel the download of a file. Here is the code I ended to have: var wreq = (HttpWebRequest)WebRequest.Create(uri); // Fire start event DownloadStarted(this, new DownloadStartedEventArgs(remoteFilePath)); long totalBytes = 0; wreq.DownloadDataInFileAsync(tmpLocalFile, cancellationTokenSource.Token, allowResume, totalBytesAction => { totalBytes = totalBytesAction; }, readBytes => { Log.Debug("Progression : {0} / {1} => {2}%", readBytes, totalBytes, 100 * (double)readBytes / totalBytes); DownloadProgress(this, new DownloadProgressEventArgs(remoteFilePath, readBytes, totalBytes, (int)(100 * readBytes / totalBytes))); }) .ContinueWith( (antecedent ) => { if (antecedent.IsFaulted) Log.Debug(antecedent.Exception.Message); //Fire end event SetEndDownload(antecedent.IsCanceled, antecedent.Exception, tmpLocalFile, 0); }, cancellationTokenSource.Token); I want to fire an end event after the download is finished, hence the ContinueWith. I slightly changed the code of the samples to add the CancellationToken and the 2 delegates to get the size of the file to download, and the progression of the download: return webRequest.GetResponseAsync() .ContinueWith(response => { if (totalBytesAction != null) totalBytesAction(response.Result.ContentLength); response.Result.GetResponseStream().WriteAllBytesAsync(filePath, ct, resumeDownload, progressAction).Wait(ct); }, ct); I had to add the call to the Wait function, because if I don't, the method exits and the end event is fired too early. Here are the modified method extensions (lot of code, apologies :p) public static Task WriteAllBytesAsync(this Stream stream, string filePath, CancellationToken ct, bool resumeDownload = false, Action<long> progressAction = null) { if (stream == null) throw new ArgumentNullException("stream"); // Copy from the source stream to the memory stream and return the copied data return stream.CopyStreamToFileAsync(filePath, ct, resumeDownload, progressAction); } public static Task CopyStreamToFileAsync(this Stream source, string destinationPath, CancellationToken ct, bool resumeDownload = false, Action<long> progressAction = null) { if (source == null) throw new ArgumentNullException("source"); if (destinationPath == null) throw new ArgumentNullException("destinationPath"); // Open the output file for writing var destinationStream = FileAsync.OpenWrite(destinationPath); // Copy the source to the destination stream, then close the output file. return CopyStreamToStreamAsync(source, destinationStream, ct, progressAction).ContinueWith(t => { var e = t.Exception; destinationStream.Close(); if (e != null) throw e; }, ct, TaskContinuationOptions.ExecuteSynchronously, TaskScheduler.Current); } public static Task CopyStreamToStreamAsync(this Stream source, Stream destination, CancellationToken ct, Action<long> progressAction = null) { if (source == null) throw new ArgumentNullException("source"); if (destination == null) throw new ArgumentNullException("destination"); return Task.Factory.Iterate(CopyStreamIterator(source, destination, ct, progressAction)); } private static IEnumerable<Task> CopyStreamIterator(Stream input, Stream output, CancellationToken ct, Action<long> progressAction = null) { // Create two buffers. One will be used for the current read operation and one for the current // write operation. We'll continually swap back and forth between them. byte[][] buffers = new byte[2][] { new byte[BUFFER_SIZE], new byte[BUFFER_SIZE] }; int filledBufferNum = 0; Task writeTask = null; int readBytes = 0; // Until there's no more data to be read or cancellation while (true) { ct.ThrowIfCancellationRequested(); // Read from the input asynchronously var readTask = input.ReadAsync(buffers[filledBufferNum], 0, buffers[filledBufferNum].Length); // If we have no pending write operations, just yield until the read operation has // completed. If we have both a pending read and a pending write, yield until both the read // and the write have completed. yield return writeTask == null ? readTask : Task.Factory.ContinueWhenAll(new[] { readTask, writeTask }, tasks => tasks.PropagateExceptions()); // If no data was read, nothing more to do. if (readTask.Result <= 0) break; readBytes += readTask.Result; if (progressAction != null) progressAction(readBytes); // Otherwise, write the written data out to the file writeTask = output.WriteAsync(buffers[filledBufferNum], 0, readTask.Result); // Swap buffers filledBufferNum ^= 1; } } So basically, at the end of the chain of called methods, I let the CancellationToken throw an OperationCanceledException if a Cancel has been requested. What I hoped was to get IsFaulted == true in the appealing code and to fire the end event with the canceled flags and the correct exception. But what I get is an unhandled exception on the line response.Result.GetResponseStream().WriteAllBytesAsync(filePath, ct, resumeDownload, progressAction).Wait(ct); telling me that I don't catch an AggregateException. I've tried various things, but I don't succeed to make the whole thing work properly. Does anyone of you have played enough with that library and may help me? Thanks in advance Mike

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• Fast multi-window rendering with C#

  - by seb

  I've been searching and testing different kind of rendering libraries for C# days for many weeks now. So far I haven't found a single library that works well on multi-windowed rendering setups. The requirement is to be able to run the program on 12+ monitor setups (financial charting) without latencies on a fast computer. Each window needs to update multiple times every second. While doing this CPU needs to do lots of intensive and time critical tasks so some of the burden has to be shifted to GPUs. That's where hardware rendering steps in, in another words DirectX or OpenGL. I have tried GDI+ with windows forms and figured it's way too slow for my needs. I have tried OpenGL via OpenTK (on windows forms control) which seemed decently quick (I still have some tests to run on it) but painfully difficult to get working properly (hard to find/program good text rendering libraries). Recently I tried DirectX9, DirectX10 and Direct2D with Windows forms via SharpDX. I tried a separate device for each window and a single device/multiple swap chains approaches. All of these resulted in very poor performance on multiple windows. For example if I set target FPS to 20 and open 4 full screen windows on different monitors the whole operating system starts lagging very badly. Rendering is simply clearing the screen to black, no primitives rendered. CPU usage on this test was about 0% and GPU usage about 10%, I don't understand what is the bottleneck here? My development computer is very fast, i7 2700k, AMD HD7900, 16GB ram so the tests should definitely run on this one. In comparison I did some DirectX9 tests on C++/Win32 API one device/multiple swap chains and I could open 100 windows spread all over the 4-monitor workspace (with 3d teapot rotating on them) and still had perfectly responsible operating system (fps was dropping of course on the rendering windows quite badly to around 5 which is what I would expect running 100 simultaneous renderings). Does anyone know any good ways to do multi-windowed rendering on C# or am I forced to re-write my program in C++ to get that performance (major pain)? I guess I'm giving OpenGL another shot before I go the C++ route... I'll report any findings here. Test methods for reference: For C# DirectX one-device multiple swapchain test I used the method from this excellent answer: Display Different images per monitor directX 10 Direct3D10 version: I created the d3d10device and DXGIFactory like this: D3DDev = new SharpDX.Direct3D10.Device(SharpDX.Direct3D10.DriverType.Hardware, SharpDX.Direct3D10.DeviceCreationFlags.None); DXGIFac = new SharpDX.DXGI.Factory(); Then initialized the rendering windows like this: var scd = new SwapChainDescription(); scd.BufferCount = 1; scd.ModeDescription = new ModeDescription(control.Width, control.Height, new Rational(60, 1), Format.R8G8B8A8_UNorm); scd.IsWindowed = true; scd.OutputHandle = control.Handle; scd.SampleDescription = new SampleDescription(1, 0); scd.SwapEffect = SwapEffect.Discard; scd.Usage = Usage.RenderTargetOutput; SC = new SwapChain(Parent.DXGIFac, Parent.D3DDev, scd); var backBuffer = Texture2D.FromSwapChain<Texture2D>(SC, 0); _rt = new RenderTargetView(Parent.D3DDev, backBuffer); Drawing command executed on each rendering iteration is simply: Parent.D3DDev.ClearRenderTargetView(_rt, new Color4(0, 0, 0, 0)); SC.Present(0, SharpDX.DXGI.PresentFlags.None); DirectX9 version is very similar: Device initialization: PresentParameters par = new PresentParameters(); par.PresentationInterval = PresentInterval.Immediate; par.Windowed = true; par.SwapEffect = SharpDX.Direct3D9.SwapEffect.Discard; par.PresentationInterval = PresentInterval.Immediate; par.AutoDepthStencilFormat = SharpDX.Direct3D9.Format.D16; par.EnableAutoDepthStencil = true; par.BackBufferFormat = SharpDX.Direct3D9.Format.X8R8G8B8; // firsthandle is the handle of first rendering window D3DDev = new SharpDX.Direct3D9.Device(new Direct3D(), 0, DeviceType.Hardware, firsthandle, CreateFlags.SoftwareVertexProcessing, par); Rendering window initialization: if (parent.D3DDev.SwapChainCount == 0) { SC = parent.D3DDev.GetSwapChain(0); } else { PresentParameters pp = new PresentParameters(); pp.Windowed = true; pp.SwapEffect = SharpDX.Direct3D9.SwapEffect.Discard; pp.BackBufferFormat = SharpDX.Direct3D9.Format.X8R8G8B8; pp.EnableAutoDepthStencil = true; pp.AutoDepthStencilFormat = SharpDX.Direct3D9.Format.D16; pp.PresentationInterval = PresentInterval.Immediate; SC = new SharpDX.Direct3D9.SwapChain(parent.D3DDev, pp); } Code for drawing loop: SharpDX.Direct3D9.Surface bb = SC.GetBackBuffer(0); Parent.D3DDev.SetRenderTarget(0, bb); Parent.D3DDev.Clear(ClearFlags.Target, Color.Black, 1f, 0); SC.Present(Present.None, new SharpDX.Rectangle(), new SharpDX.Rectangle(), HWND); bb.Dispose(); C++ DirectX9/Win32 API test with multiple swapchains and one device code is here: http://pastebin.com/tjnRvATJ It's a modified version from Kevin Harris's nice example code.

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• Creating Item Templates as Visual Studio 2010 Extensions

  - by maziar

  Technorati Tags: Visual Studio 2010 Extension,T4 Template,VSIX,Item Template Wizard This blog post briefly introduces creation of an item template as a Visual studio 2010 extension. Problem specification Assume you are writing a Framework for data-oriented applications and you decide to include all your application messages in a SQL server database table. After creating the table, your create a class in your framework for getting messages with a string key specified.   var message = FrameworkMessages.Get("ChangesSavedSuccess");   Everyone would say this code is so error prone, because message keys are not strong-typed, and might create errors in application that are not caught in tests. So we think of a way to make it strong-typed, i.e. create a class to use it like this:   var message = Messages.ChangesSavedSuccess; in Messages class the code looks like this: public string ChangesSavedSuccess {     get { return FrameworkMessages.Get("ChangesSavedSuccess"); } }   And clearly, we are not going to create the Messages class manually; we need a class generator for it.   Again assume that the application(s) that intend to use our framework, contain multiple sub-systems. So each sub-system need to have it’s own strong-typed message class that call FrameworkMessages.Get method. So we would like to make our code generator an Item Template so that each developer would easily add the item to his project and no other works would be necessary.   Solution We create a T4 Text Template to generate our strong typed class from database. Then create a Visual Studio Item Template with this generator and publish it.   What Are T4 Templates You might be already familiar with T4 templates. If it’s so, you can skip this section. T4 Text Template is a fine Visual Studio file type (.tt) that generates output text. This file is a mixture of text blocks and code logic (in C# or VB). For example, you can generate HTML files, C# classes, Resource files and etc with use of a T4 template.   Syntax highlighting In Visual Studio 2010 a T4 Template by default will no be syntax highlighted and no auto-complete is supported for it. But there is a fine visual studio extension named ‘Visual T4’ which can be downloaded free from VisualStudioGallery. This tool offers IntelliSense, syntax coloring, validation, transformation preview and more for T4 templates.     How Item Templates work in Visual Studio Visual studio extensions allow us to add some functionalities to visual studio. In our case we need to create a .vsix file that adds a template to visual studio item templates. Item templates are zip files containing the template file and a meta-data file with .vstemplate extension. This .vstemplate file is an XML file that provides some information about the template. A .vsix file also is a zip file (renamed to .vsix) that are open with visual studio extension installer. (Re-installing a vsix file requires that old one to be uninstalled from VS: Tools > Extension Manager.) Installing a vsix will need Visual Studio to be closed and re-opened to take effect. Visual studio extension installer will easily find the item template’s zip file and copy it to visual studio’s template items folder. You can find other visual studio templates in [<VS Install Path>\Common7\IDE\ItemTemplates] and you can edit them; but be very careful with VS default templates.   How Can I Create a VSIX file 1. Visual Studio SDK depending on your Visual Studio’s version, you need to download Microsoft Visual Studio SDK. Note that if you have VS 2010 SP1, you will need to download and install VS 2010 SP1 SDK; VS 2010 SDK will not be installed (unless you change registry value that indicated your service pack number). Here is the link for VS 2010 SP1 SDK. After downloading, Run it and follow the wizard to complete the installation.   2. Create the file you want to make it an Item Template Create a project (or use an existing one) and add you file, edit it to make it work fine.   Back to our own problem, we need to create a T4 (.tt) template. VS-Prok: Add > New Item > General > Text Template Type a file name, ex. Message.tt, and press Add. Create the T4 template file (in this blog I do not intend to include T4 syntaxes so I just write down the code which is clear enough for you to understand)   <#@ template debug="false" hostspecific="true" language="C#" #> <#@ output extension=".cs" #> <#@ Assembly Name="System.Data" #> <#@ Import Namespace="System.Data.SqlClient" #> <#@ Import Namespace="System.Text" #> <#@ Import Namespace="System.IO" #> <#     var connectionString = "server=Maziar-PC; Database=MyDatabase; Integrated Security=True";     var systemName = "Sys1";     var builder = new StringBuilder();     using (var connection = new SqlConnection(connectionString))     {         connection.Open();         var command = connection.CreateCommand();         command.CommandText = string.Format("SELECT [Key] FROM [Message] WHERE System = '{0}'", systemName);         var reader = command.ExecuteReader();         while (reader.Read())         {             builder.AppendFormat("        public static string {0} {{ get {{ return FrameworkMessages.Get(\"{0}\"); }} }}\r\n", reader[0]);         }     } #> namespace <#= System.Runtime.Remoting.Messaging.CallContext.LogicalGetData("NamespaceHint") #> {     public static class <#= Path.GetFileNameWithoutExtension(Host.TemplateFile) #>     { <#= builder.ToString() #>     } } As you can see the T4 template connects to a database, reads message keys and generates a class. Here is the output: namespace MyProject.MyFolder {     public static class Messages     {         public static string ChangesSavedSuccess { get { return FrameworkMessages.Get("ChangesSavedSuccess"); } }         public static string ErrorSavingChanges { get { return FrameworkMessages.Get("ErrorSavingChanges"); } }     } }   The output looks fine but there is one problem. The connectionString and systemName are hard coded. so how can I create an flexible item template? One of features of item templates in visual studio is that you can create a designer wizard for your item template, so I can get connection information and system name there. now lets go on creating the vsix file.   3. Create Template In visual studio click on File > Export Template a wizard will show up. if first step click on Item Template on in the combo box select the project that contains Messages.tt. click next. Select Messages.tt from list in second step. click next. In the third step, you should choose References. For this template, System and System.Data are needed so choose them. click next. write down template name, description, if you like add a .ico file as the icon file and also preview image. Uncheck automatically add the templare … . Copy the output location in clip board. click finish.     4. Create VSIX Project In VS, Click File > New > Project > Extensibility > VSIX Project Type a name, ex. FrameworkMessages, Location, etc. The project will include a .vsixmanifest file. Fill in fields like Author, Product Name, Description, etc.   In Content section, click on Add Content. choose content type as Item Template. choose source as file. remember you have the template file address in clipboard? now paste it in front of file. click OK.     5. Build VSIX Project That’s it, build the project and go to output directory. You see a .vsix file. you can run it now. After restarting VS, if you click on a project > Add > New Item, you will see your item in list and you can add it. When you add this item to a project, if it has not references to System and System.Data they will be added. but the problem mentioned in step 2 is seen now.     6. Create Design Wizard for your Item Template Create a project i.e. Windows Application named ‘Framework.Messages.Design’, but better change its output type to Class Library. Add References to Microsoft.VisualStudio.TemplateWizardInterface and envdte Add a class Named MessagesDesigner in your project and Implement IWizard interface in it. This is what you should write: using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.VisualStudio.TemplateWizard; using EnvDTE; namespace Framework.Messages.Design {     class MessageDesigner : IWizard     {         private bool CanAddProjectItem;         public void RunStarted(object automationObject, Dictionary<string, string> replacementsDictionary, WizardRunKind runKind, object[] customParams)         {             // Prompt user for Connection String and System Name in a Windows form (ShowDialog) here             // (try to provide good interface)             // if user clicks on cancel of your windows form return;             string connectionString = "connection;string"; // Set value from the form             string systemName = "system;name"; // Set value from the form             CanAddProjectItem = true;             replacementsDictionary.Add("$connectionString$", connectionString);             replacementsDictionary.Add("$systemName$", systemName);         }         public bool ShouldAddProjectItem(string filePath)         {             return CanAddProjectItem;         }         public void BeforeOpeningFile(ProjectItem projectItem)         {         }         public void ProjectFinishedGenerating(Project project)         {         }         public void ProjectItemFinishedGenerating(ProjectItem projectItem)         {         }         public void RunFinished()         {         }     } }   before your code runs  replacementsDictionary contains list of default template parameters. After that, two other parameters are added. Now build this project and copy the output assembly to [<VS Install Path>\Common7\IDE] folder.   your designer is ready.     The template that you had created is now added to your VSIX project. In windows explorer open your template zip file (extract it somewhere). open the .vstemplate file. first of all remove <ProjectItem SubType="Code" TargetFileName="$fileinputname$.cs" ReplaceParameters="true">Messages.cs</ProjectItem> because the .cs file is not to be intended to be a part of template and it will be generated. change value of ReplaceParameters for your .tt file to true to enable parameter replacement in this file. now right after </TemplateContent> end element, write this: <WizardExtension>   <Assembly>Framework.Messages.Design</Assembly>   <FullClassName>Framework.Messages.Design.MessageDesigner</FullClassName> </WizardExtension>   one other thing that you should do is to edit your .tt file and remove your .cs file. Lines 8 and 9 of your .tt file should be:     var connectionString = "$connectionString$";     var systemName = "$systemName$"; this parameters will be replaced when the item is added to a project. Save the contents to a zip file with same file name and replace the original file.   now again build your VSIX project, uninstall your extension. close VS. now run .vsix file. open vs, add an item of type messages to your project, bingo, your wizard form will show up. fill the fields and click ok, values are replaced in .tt file added.     that’s it. tried so hard to make this post brief, hope it was not so long…   Cheers Maziar

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• Making swap faster, easier to use and exception-safe

  - by FredOverflow

  I could not sleep last night and started thinking about std::swap. Here is the familiar C++98 version: template <typename T> void swap(T& a, T& b) { T c(a); a = b; b = c; } If a user-defined class Foo uses external ressources, this is inefficient. The common idiom is to provide a method void Foo::swap(Foo& other) and a specialization of std::swap<Foo>. Note that this does not work with class templates since you cannot partially specialize a function template, and overloading names in the std namespace is illegal. The solution is to write a template function in one's own namespace and rely on argument dependent lookup to find it. This depends critically on the client to follow the "using std::swap idiom" instead of calling std::swap directly. Very brittle. In C++0x, if Foo has a user-defined move constructor and a move assignment operator, providing a custom swap method and a std::swap<Foo> specialization has little to no performance benefit, because the C++0x version of std::swap uses efficient moves instead of copies: #include <utility> template <typename T> void swap(T& a, T& b) { T c(std::move(a)); a = std::move(b); b = std::move(c); } Not having to fiddle with swap anymore already takes a lot of burden away from the programmer. Current compilers do not generate move constructors and move assignment operators automatically yet, but as far as I know, this will change. The only problem left then is exception-safety, because in general, move operations are allowed to throw, and this opens up a whole can of worms. The question "What exactly is the state of a moved-from object?" complicates things further. Then I was thinking, what exactly are the semantics of std::swap in C++0x if everything goes fine? What is the state of the objects before and after the swap? Typically, swapping via move operations does not touch external resources, only the "flat" object representations themselves. So why not simply write a swap template that does exactly that: swap the object representations? #include <cstring> template <typename T> void swap(T& a, T& b) { unsigned char c[sizeof(T)]; memcpy( c, &a, sizeof(T)); memcpy(&a, &b, sizeof(T)); memcpy(&b, c, sizeof(T)); } This is as efficient as it gets: it simply blasts through raw memory. It does not require any intervention from the user: no special swap methods or move operations have to be defined. This means that it even works in C++98 (which does not have rvalue references, mind you). But even more importantly, we can now forget about the exception-safety issues, because memcpy never throws. I can see two potential problems with this approach: First, not all objects are meant to be swapped. If a class designer hides the copy constructor or the copy assignment operator, trying to swap objects of the class should fail at compile-time. We can simply introduce some dead code that checks whether copying and assignment are legal on the type: template <typename T> void swap(T& a, T& b) { if (false) // dead code, never executed { T c(a); // copy-constructible? a = b; // assignable? } unsigned char c[sizeof(T)]; std::memcpy( c, &a, sizeof(T)); std::memcpy(&a, &b, sizeof(T)); std::memcpy(&b, c, sizeof(T)); } Any decent compiler can trivially get rid of the dead code. (There are probably better ways to check the "swap conformance", but that is not the point. What matters is that it's possible). Second, some types might perform "unusual" actions in the copy constructor and copy assignment operator. For example, they might notify observers of their change. I deem this a minor issue, because such kinds of objects probably should not have provided copy operations in the first place. Please let me know what you think of this approach to swapping. Would it work in practice? Would you use it? Can you identify library types where this would break? Do you see additional problems? Discuss!

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• Modelling boost::Lockable with semaphore rather than mutex (previously titled: Unlocking a mutex fr

  - by dan

  I'm using the C++ boost::thread library, which in my case means I'm using pthreads. Officially, a mutex must be unlocked from the same thread which locks it, and I want the effect of being able to lock in one thread and then unlock in another. There are many ways to accomplish this. One possibility would be to write a new mutex class which allows this behavior. For example: class inter_thread_mutex{ bool locked; boost::mutex mx; boost::condition_variable cv; public: void lock(){ boost::unique_lock<boost::mutex> lck(mx); while(locked) cv.wait(lck); locked=true; } void unlock(){ { boost::lock_guard<boost::mutex> lck(mx); if(!locked) error(); locked=false; } cv.notify_one(); } // bool try_lock(); void error(); etc. } I should point out that the above code doesn't guarantee FIFO access, since if one thread calls lock() while another calls unlock(), this first thread may acquire the lock ahead of other threads which are waiting. (Come to think of it, the boost::thread documentation doesn't appear to make any explicit scheduling guarantees for either mutexes or condition variables). But let's just ignore that (and any other bugs) for now. My question is, if I decide to go this route, would I be able to use such a mutex as a model for the boost Lockable concept. For example, would anything go wrong if I use a boost::unique_lock< inter_thread_mutex for RAII-style access, and then pass this lock to boost::condition_variable_any.wait(), etc. On one hand I don't see why not. On the other hand, "I don't see why not" is usually a very bad way of determining whether something will work. The reason I ask is that if it turns out that I have to write wrapper classes for RAII locks and condition variables and whatever else, then I'd rather just find some other way to achieve the same effect. EDIT: The kind of behavior I want is basically as follows. I have an object, and it needs to be locked whenever it is modified. I want to lock the object from one thread, and do some work on it. Then I want to keep the object locked while I tell another worker thread to complete the work. So the first thread can go on and do something else while the worker thread finishes up. When the worker thread gets done, it unlocks the mutex. And I want the transition to be seemless so nobody else can get the mutex lock in between when thread 1 starts the work and thread 2 completes it. Something like inter_thread_mutex seems like it would work, and it would also allow the program to interact with it as if it were an ordinary mutex. So it seems like a clean solution. If there's a better solution, I'd be happy to hear that also. EDIT AGAIN: The reason I need locks to begin with is that there are multiple master threads, and the locks are there to prevent them from accessing shared objects concurrently in invalid ways. So the code already uses loop-level lock-free sequencing of operations at the master thread level. Also, in the original implementation, there were no worker threads, and the mutexes were ordinary kosher mutexes. The inter_thread_thingy came up as an optimization, primarily to improve response time. In many cases, it was sufficient to guarantee that the "first part" of operation A, occurs before the "first part" of operation B. As a dumb example, say I punch object 1 and give it a black eye. Then I tell object 1 to change it's internal structure to reflect all the tissue damage. I don't want to wait around for the tissue damage before I move on to punch object 2. However, I do want the tissue damage to occur as part of the same operation; for example, in the interim, I don't want any other thread to reconfigure the object in such a way that would make tissue damage an invalid operation. (yes, this example is imperfect in many ways, and no I'm not working on a game) So we made the change to a model where ownership of an object can be passed to a worker thread to complete an operation, and it actually works quite nicely; each master thread is able to get a lot more operations done because it doesn't need to wait for them all to complete. And, since the event sequencing at the master thread level is still loop-based, it is easy to write high-level master-thread operations, as they can be based on the assumption that an operation is complete when the corresponding function call returns. Finally, I thought it would be nice to use inter_thread mutex/semaphore thingies using RAII with boost locks to encapsulate the necessary synchronization that is required to make the whole thing work.

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• Why should main() be short?

  - by Stargazer712

  I've been programming for over 9 years, and according to the advice of my first programming teacher, I always keep my main() function extremely short. At first I had no idea why. I just obeyed without understanding, much to the delight of my professors. After gaining experience, I realized that if I designed my code correctly, having a short main() function just sortof happened. Writing modularized code and following the single responsibility principle allowed my code to be designed in "bunches", and main() served as nothing more than a catalyst to get the program running. Fast forward to a few weeks ago, I was looking at Python's souce code, and I found the main() function: /* Minimal main program -- everything is loaded from the library */ ... int main(int argc, char **argv) { ... return Py_Main(argc, argv); } Yay python. Short main() function == Good code. Programming teachers were right. Wanting to look deeper, I took a look at Py_Main. In its entirety, it is defined as follows: /* Main program */ int Py_Main(int argc, char **argv) { int c; int sts; char *command = NULL; char *filename = NULL; char *module = NULL; FILE *fp = stdin; char *p; int unbuffered = 0; int skipfirstline = 0; int stdin_is_interactive = 0; int help = 0; int version = 0; int saw_unbuffered_flag = 0; PyCompilerFlags cf; cf.cf_flags = 0; orig_argc = argc; /* For Py_GetArgcArgv() */ orig_argv = argv; #ifdef RISCOS Py_RISCOSWimpFlag = 0; #endif PySys_ResetWarnOptions(); while ((c = _PyOS_GetOpt(argc, argv, PROGRAM_OPTS)) != EOF) { if (c == 'c') { /* -c is the last option; following arguments that look like options are left for the command to interpret. */ command = (char *)malloc(strlen(_PyOS_optarg) + 2); if (command == NULL) Py_FatalError( "not enough memory to copy -c argument"); strcpy(command, _PyOS_optarg); strcat(command, "\n"); break; } if (c == 'm') { /* -m is the last option; following arguments that look like options are left for the module to interpret. */ module = (char *)malloc(strlen(_PyOS_optarg) + 2); if (module == NULL) Py_FatalError( "not enough memory to copy -m argument"); strcpy(module, _PyOS_optarg); break; } switch (c) { case 'b': Py_BytesWarningFlag++; break; case 'd': Py_DebugFlag++; break; case '3': Py_Py3kWarningFlag++; if (!Py_DivisionWarningFlag) Py_DivisionWarningFlag = 1; break; case 'Q': if (strcmp(_PyOS_optarg, "old") == 0) { Py_DivisionWarningFlag = 0; break; } if (strcmp(_PyOS_optarg, "warn") == 0) { Py_DivisionWarningFlag = 1; break; } if (strcmp(_PyOS_optarg, "warnall") == 0) { Py_DivisionWarningFlag = 2; break; } if (strcmp(_PyOS_optarg, "new") == 0) { /* This only affects __main__ */ cf.cf_flags |= CO_FUTURE_DIVISION; /* And this tells the eval loop to treat BINARY_DIVIDE as BINARY_TRUE_DIVIDE */ _Py_QnewFlag = 1; break; } fprintf(stderr, "-Q option should be `-Qold', " "`-Qwarn', `-Qwarnall', or `-Qnew' only\n"); return usage(2, argv[0]); /* NOTREACHED */ case 'i': Py_InspectFlag++; Py_InteractiveFlag++; break; /* case 'J': reserved for Jython */ case 'O': Py_OptimizeFlag++; break; case 'B': Py_DontWriteBytecodeFlag++; break; case 's': Py_NoUserSiteDirectory++; break; case 'S': Py_NoSiteFlag++; break; case 'E': Py_IgnoreEnvironmentFlag++; break; case 't': Py_TabcheckFlag++; break; case 'u': unbuffered++; saw_unbuffered_flag = 1; break; case 'v': Py_VerboseFlag++; break; #ifdef RISCOS case 'w': Py_RISCOSWimpFlag = 1; break; #endif case 'x': skipfirstline = 1; break; /* case 'X': reserved for implementation-specific arguments */ case 'U': Py_UnicodeFlag++; break; case 'h': case '?': help++; break; case 'V': version++; break; case 'W': PySys_AddWarnOption(_PyOS_optarg); break; /* This space reserved for other options */ default: return usage(2, argv[0]); /*NOTREACHED*/ } } if (help) return usage(0, argv[0]); if (version) { fprintf(stderr, "Python %s\n", PY_VERSION); return 0; } if (Py_Py3kWarningFlag && !Py_TabcheckFlag) /* -3 implies -t (but not -tt) */ Py_TabcheckFlag = 1; if (!Py_InspectFlag && (p = Py_GETENV("PYTHONINSPECT")) && *p != '\0') Py_InspectFlag = 1; if (!saw_unbuffered_flag && (p = Py_GETENV("PYTHONUNBUFFERED")) && *p != '\0') unbuffered = 1; if (!Py_NoUserSiteDirectory && (p = Py_GETENV("PYTHONNOUSERSITE")) && *p != '\0') Py_NoUserSiteDirectory = 1; if ((p = Py_GETENV("PYTHONWARNINGS")) && *p != '\0') { char *buf, *warning; buf = (char *)malloc(strlen(p) + 1); if (buf == NULL) Py_FatalError( "not enough memory to copy PYTHONWARNINGS"); strcpy(buf, p); for (warning = strtok(buf, ","); warning != NULL; warning = strtok(NULL, ",")) PySys_AddWarnOption(warning); free(buf); } if (command == NULL && module == NULL && _PyOS_optind < argc && strcmp(argv[_PyOS_optind], "-") != 0) { #ifdef __VMS filename = decc$translate_vms(argv[_PyOS_optind]); if (filename == (char *)0 || filename == (char *)-1) filename = argv[_PyOS_optind]; #else filename = argv[_PyOS_optind]; #endif } stdin_is_interactive = Py_FdIsInteractive(stdin, (char *)0); if (unbuffered) { #if defined(MS_WINDOWS) || defined(__CYGWIN__) _setmode(fileno(stdin), O_BINARY); _setmode(fileno(stdout), O_BINARY); #endif #ifdef HAVE_SETVBUF setvbuf(stdin, (char *)NULL, _IONBF, BUFSIZ); setvbuf(stdout, (char *)NULL, _IONBF, BUFSIZ); setvbuf(stderr, (char *)NULL, _IONBF, BUFSIZ); #else /* !HAVE_SETVBUF */ setbuf(stdin, (char *)NULL); setbuf(stdout, (char *)NULL); setbuf(stderr, (char *)NULL); #endif /* !HAVE_SETVBUF */ } else if (Py_InteractiveFlag) { #ifdef MS_WINDOWS /* Doesn't have to have line-buffered -- use unbuffered */ /* Any set[v]buf(stdin, ...) screws up Tkinter :-( */ setvbuf(stdout, (char *)NULL, _IONBF, BUFSIZ); #else /* !MS_WINDOWS */ #ifdef HAVE_SETVBUF setvbuf(stdin, (char *)NULL, _IOLBF, BUFSIZ); setvbuf(stdout, (char *)NULL, _IOLBF, BUFSIZ); #endif /* HAVE_SETVBUF */ #endif /* !MS_WINDOWS */ /* Leave stderr alone - it should be unbuffered anyway. */ } #ifdef __VMS else { setvbuf (stdout, (char *)NULL, _IOLBF, BUFSIZ); } #endif /* __VMS */ #ifdef __APPLE__ /* On MacOS X, when the Python interpreter is embedded in an application bundle, it gets executed by a bootstrapping script that does os.execve() with an argv[0] that's different from the actual Python executable. This is needed to keep the Finder happy, or rather, to work around Apple's overly strict requirements of the process name. However, we still need a usable sys.executable, so the actual executable path is passed in an environment variable. See Lib/plat-mac/bundlebuiler.py for details about the bootstrap script. */ if ((p = Py_GETENV("PYTHONEXECUTABLE")) && *p != '\0') Py_SetProgramName(p); else Py_SetProgramName(argv[0]); #else Py_SetProgramName(argv[0]); #endif Py_Initialize(); if (Py_VerboseFlag || (command == NULL && filename == NULL && module == NULL && stdin_is_interactive)) { fprintf(stderr, "Python %s on %s\n", Py_GetVersion(), Py_GetPlatform()); if (!Py_NoSiteFlag) fprintf(stderr, "%s\n", COPYRIGHT); } if (command != NULL) { /* Backup _PyOS_optind and force sys.argv[0] = '-c' */ _PyOS_optind--; argv[_PyOS_optind] = "-c"; } if (module != NULL) { /* Backup _PyOS_optind and force sys.argv[0] = '-c' so that PySys_SetArgv correctly sets sys.path[0] to '' rather than looking for a file called "-m". See tracker issue #8202 for details. */ _PyOS_optind--; argv[_PyOS_optind] = "-c"; } PySys_SetArgv(argc-_PyOS_optind, argv+_PyOS_optind); if ((Py_InspectFlag || (command == NULL && filename == NULL && module == NULL)) && isatty(fileno(stdin))) { PyObject *v; v = PyImport_ImportModule("readline"); if (v == NULL) PyErr_Clear(); else Py_DECREF(v); } if (command) { sts = PyRun_SimpleStringFlags(command, &cf) != 0; free(command); } else if (module) { sts = RunModule(module, 1); free(module); } else { if (filename == NULL && stdin_is_interactive) { Py_InspectFlag = 0; /* do exit on SystemExit */ RunStartupFile(&cf); } /* XXX */ sts = -1; /* keep track of whether we've already run __main__ */ if (filename != NULL) { sts = RunMainFromImporter(filename); } if (sts==-1 && filename!=NULL) { if ((fp = fopen(filename, "r")) == NULL) { fprintf(stderr, "%s: can't open file '%s': [Errno %d] %s\n", argv[0], filename, errno, strerror(errno)); return 2; } else if (skipfirstline) { int ch; /* Push back first newline so line numbers remain the same */ while ((ch = getc(fp)) != EOF) { if (ch == '\n') { (void)ungetc(ch, fp); break; } } } { /* XXX: does this work on Win/Win64? (see posix_fstat) */ struct stat sb; if (fstat(fileno(fp), &sb) == 0 && S_ISDIR(sb.st_mode)) { fprintf(stderr, "%s: '%s' is a directory, cannot continue\n", argv[0], filename); fclose(fp); return 1; } } } if (sts==-1) { /* call pending calls like signal handlers (SIGINT) */ if (Py_MakePendingCalls() == -1) { PyErr_Print(); sts = 1; } else { sts = PyRun_AnyFileExFlags( fp, filename == NULL ? "<stdin>" : filename, filename != NULL, &cf) != 0; } } } /* Check this environment variable at the end, to give programs the * opportunity to set it from Python. */ if (!Py_InspectFlag && (p = Py_GETENV("PYTHONINSPECT")) && *p != '\0') { Py_InspectFlag = 1; } if (Py_InspectFlag && stdin_is_interactive && (filename != NULL || command != NULL || module != NULL)) { Py_InspectFlag = 0; /* XXX */ sts = PyRun_AnyFileFlags(stdin, "<stdin>", &cf) != 0; } Py_Finalize(); #ifdef RISCOS if (Py_RISCOSWimpFlag) fprintf(stderr, "\x0cq\x0c"); /* make frontend quit */ #endif #ifdef __INSURE__ /* Insure++ is a memory analysis tool that aids in discovering * memory leaks and other memory problems. On Python exit, the * interned string dictionary is flagged as being in use at exit * (which it is). Under normal circumstances, this is fine because * the memory will be automatically reclaimed by the system. Under * memory debugging, it's a huge source of useless noise, so we * trade off slower shutdown for less distraction in the memory * reports. -baw */ _Py_ReleaseInternedStrings(); #endif /* __INSURE__ */ return sts; } Good God Almighty...it is big enough to sink the Titanic. It seems as though Python did the "Intro to Programming 101" trick and just moved all of main()'s code to a different function called it something very similar to "main". Here's my question: Is this code terribly written, or are there other reasons to have a short main function? As it stands right now, I see absolutely no difference between doing this and just moving the code in Py_Main() back into main(). Am I wrong in thinking this?

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