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  • SQL SERVER – guest User and MSDB Database – Enable guest User on MSDB Database

    - by pinaldave
    I have written a few articles recently on the subject of guest account. Here’s a quick list of these articles: SQL SERVER – Disable Guest Account – Serious Security Issue SQL SERVER – Force Removing User from Database – Fix: Error: Could not drop login ‘test’ as the user is currently logged in. SQL SERVER – Detecting guest User Permissions – guest User Access Status One of the advices which I gave in all the three blog posts was: Disable the guest user in the user-created database. Additionally, I have mentioned that one should let the user account become enabled in MSDB database. I got many questions asking if there is any specific reason why this should be kept enabled, questions like, “What is the reason that MSDB database needs guest user?” Honestly, I did not know that the concept of the guest user will create so much interest in the readers. So now let’s turn this blog post into questions and answers format. Q: What will happen if the guest user is disabled in MSDB database? A:  Lots of bad things will happen. Error 916 - Logins can connect to this instance of SQL Server but they do not have specific permissions in a database to receive the permissions of the guest user. Q: How can I determine if the guest user is enabled or disabled for any specific database? A: There are many ways to do this. Make sure that you run each of these methods with the context of the database. For an example for msdb database, you can run the following code: USE msdb; SELECT name, permission_name, state_desc FROM sys.database_principals dp INNER JOIN sys.server_permissions sp ON dp.principal_id = sp.grantee_principal_id WHERE name = 'guest' AND permission_name = 'CONNECT' There are many other methods to detect the guest user status. Read them here: Detecting guest User Permissions – guest User Access Status Q: What is the default status of the guest user account in database? A: Enabled in master, TempDb, and MSDB. Disabled in model database. Q: Why is the default status of the guest user disabled in model database? A: It is not recommended to enable the guest in user database as it can introduce serious security threat. It can seriously damage the database if configured incorrectly. Read more here: Disable Guest Account – Serious Security Issue Q: How to disable guest user? A: REVOKE CONNECT FROM guest Q: How to enable guest user? A: GRANT CONNECT TO guest Did I miss any critical question in the list? Please leave your question as a comment and I will add it to this list. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Security, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Good fix vs Quick fix [duplicate]

    - by Andrea Girardi
    This question already has an answer here: Does craftsmanship pay off? [duplicate] 16 answers Good design: How much hackyness is acceptable? [duplicate] 9 answers How do you balance between “do it right” and “do it ASAP” in your daily work? 14 answers Let's start from this principle: quality is a feature that you can't add to a project in the middle of the development process. This is the scenario: two weeks to go live with my project and, one of the developers added a specific method used only for one web application to our framework (Our framework is a bounce of java classes used to extract content from MongoDB, Alfresco, mySql and it's used by web applications). I'm the team leader and I told him to generalize the method to keep the framework to keep reusable but he said "no, I prefer don't do that because there are a lot of bugs that need to be fixed". The manager is agree with him and of course I'm not. Is it better to made extra effort to keep a framework free from any specific implementation (probably used only by one web application) or just add the methods because it works? So, my question is: is it correct to write code that only works or is better to write code that works but it doesn't sucks (i.e. adding embedded value, specific methods, extra classes, add column to database, etc)? How is it possible to justify the extra time (to be honest, this kind of fix requires 10 minutes extra to write a good generic code) to the management? How is possible to argue it's the right way to write code to young developers and PM? in general, good fix or quick fix? Ah, 10 minutes after I get the email from PM, he asked me why on a url of application 2 there was the name of application 1 during the login? I like to quote Jeff Atwood: "Don't leave "broken windows" (bad designs, wrong decisions, or poor code) unrepaired. Fix each one as soon as it is discovered. " Excerpt From: Hyperink. "How-To-Stop-Sucking-And-Be-Awesome-Instead." iBooks.

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  • CodePlex Daily Summary for Sunday, June 13, 2010

    CodePlex Daily Summary for Sunday, June 13, 2010New ProjectsCurve Drawer: A Java project to explore the possibilities of drawing curves and knots.File Manager Redux: .NET version of the original File Manager.Hierachical Gantt Chart In SharePoint 2010: This solution makes it easier for shedule management. We will provide a wsp including a list definition and a custom gantt control. The list defi...Light Box Control for Asp.Net: Lightbox control for asp.net is used to display the thumbnail images. on clicking the thumbnail images the original images is displayed in the ligh...Linquify: Linquify is a Visual Studio 2008/2010 Addin and C# .NET business class / DTO generator for LINQ to SQL and the Entity Framework. It supports rapid ...Microsoft Dynamics CRM Query - T4 Template: A T4 Template that generates code that leverages LINQ to SQL and the Microsoft Dynamics CRM API to give a CRM data access solution. There is also ...Open Sound Control Library: A .NET Library for the Open Sound Control Protocol. This library makes it easy to use devices which communicate via OSC.Questionable Content Screensaver: A screensaver for the questionable content comic. It is written in C#, and uses the windows presentation foundation. See the comic at http://ww...Reflect: Reflect is an open source .NET reflection tool used for viewing metadata of .NET assemblies.runescape 602 client tools and server: runescape 602 client tools and serverSharpCrack: Hash cracker written in managed code.SilverCAT project: This is my Windows Azure study project. So far I did not find any value to share it to the public. If I find it out one day, I will add hereSilverStackAPI: My entry for the Stack Exchange API contest. A silverlight library and demo app.social bookmark control for asp.net: social bookmark control for asp.net, This control is used to bookmark the current asp.net page into popular social networking sites like facebook, ...SSIS Event Log Source: An SSIS 2005 Data Source component for loading Windows 2003/XP event logs (*.evt) into SQL Server 2005 for analysisUnOfficial ActiveWorlds Wrapper.Net: UnOfficial ActiveWorlds Wrapper .Net makes it easier for programmers to make active worlds bots. You'll no longer have to make it by yourself. It'...Using Named Pipe and self-elevation feature of Vista in a console application.: NPipeWithElevatedProc, make it easier for console application users, running programs with administrator privileges. The processing messages are al...Virtual Keyboard control for asp.net: Virtual Keyboard control for asp.net, This control is used to get the secured inputs through virtual keyboards.Visual Studio 2010 PowerShell Code Generator: Brings rich PowerShell functionalities into VS Templating. You can access the file system, the registry, and many other PowerShell features. You ca...WatchersNET.UrlShorty: This Module allows users to shorten a long URL and share it, this is a similiar service to web services like bit.ly, tinyurl.com and others. It als...New ReleasesBD File Hash: BD File Hash 1.0.5: The first public release of BD File Hash.Cassandraemon: Cassandraemon 0.6.0: Cassandraemon is LINQ Provider for Apache Cassandra. This is first release of Cassandraemon. Features You can Query by LINQ Support Regist, Del...Community Forums NNTP bridge: Community Forums NNTP Bridge V36: 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 ad...Curve Drawer: Alpha 1: Basic functionality is available to draw curves and clear them.CycleMania Starter Kit EAP - ASP.NET 4 Problem - Design - Solution: Cyclemania 09.32: see Source Code tab for recent change historyDEWD: DEWD for Umbraco v1.0 (beta-2): Beta release of the package. Functional feature set and fairly stable. Since the last release: Default values (support for dynamic values such as t...Fiddler TreeView Panel Extension: FiddlerTreeViewPanel 0.71: Added support for double-click to expand/collapse all child nodes. Keep selected node when losing focus from the TreeView. Please refer to http://...HKGolden Express: HKGoldenExpress (Build 201006130200): New features: User can reply to message with quoting others' message. Bug fix: Incorrect format of dynamically generated Sitemap XML. Improveme...Liekhus ADO.NET Entity Data Model XAF Extensions: Version 1.1.2: Latest patches and changes.Light Box Control for Asp.Net: Light Box Control for asp.net: Lightbox control for asp.net is used to display the thumbnail images. on clicking the thumbnail images the original images is displayed in the ligh...Lightweight Fluent Workflow: Objectflow 1.1.0.0: This release has support for multi-threaded operations. As this required significant changes to the fluent interface I have introduced breaking ch...Linquify: Linquify 1.6: Linquify 1.6 Includes: - Support for Entity Framework foreign keys - TransactionsLiteFx: LiteFx Alpha: Versão alpha do LiteFx.Microsoft Dynamics CRM Query - T4 Template: MS CRM Query T4 Template Version 0.5 Beta: Initial ReleaseNHibernate Membership Provider: NHibernate Membership Provider 0.9c: This is an updated source package with updated unit tests and some minor refactoring.NLog - Advanced .NET Logging: Nightly Build 2010.06.12.001: Changes since the last build:2010-06-12 10:42:41 Jarek Kowalski Added Width, Height, AutoScroll and MaxLines parameters to RichTextBoxTarget. 2010...Radical: Radical 1.0.1 (Vacuum): First drop with support for Windows Phone 7SharpCrack: SharpCrack v0.8: First release of SharpCrack. It does not support brute-force mode.social bookmark control for asp.net: social bookmark control for asp.net: social bookmark control for asp.net, This control is used to bookmark the current asp.net page into popular social networking sites like facebook, ...StardustExtensions: Simple hello: This is a very simple hello world script. Is just a basic script, is not packaged and works on IronPythonTiledLib: TiledLib 1.5: This release introduces breaking changes from 1.2. If you upgrade to this version from 1.2, you may have compiler errors and/or runtime differences...UDC indexes parser: UDC Parser RC1: Обновлена библиотека токенов, добавлены xml-doc комментарии, обновлен и исправлен код, обновлена логика лексера, обновлена грамматика парсера. Доба...UnOfficial ActiveWorlds Wrapper.Net: UnOfficial ActiveWorlds Wrapper.Net V0.5.85.1: NewLogin Structure. LaserBeam. ChangedOld Functions Changes Function Names Old New WorldInstanceSet SetWorldInstance WorldInstanceGet GetWo...UrzaGatherer: UrzaGatherer v2.0.2a: Inegration of VS Installer.VCC: Latest build, v2.1.30612.0: Automatic drop of latest buildVirtual Keyboard control for asp.net: virtual keyboard control: Virtual Keyboard control for asp.net, This control is used to get the secured inputs through virtual keyboards.Visual Studio 2010 PowerShell Code Generator: PSCodeGenerator: How to install PowerShell Code GeneratorDownload the zip Unzip Run .\Install-PSCodeGenerator.ps1 at the PowerShell console prompt Copies the te...VsTortoise - a TortoiseSVN add-in for Microsoft Visual Studio: VsTortoise Build 25 Beta: Build 25 (beta) New: Added support for Filter items (virtual folders) in Solution Explorer. New: Added "Get Lock..." to Solution Explorer context...WatchersNET.UrlShorty: WatchersNET.UrlShorty 01.00.00: First BETA Release Please Read the Readme or the Online Documentation for Install Instructions.Yet Another GPS: Release Beta 2.1: Release Beta 2.1: - Fix KML Template with Google Map Mobile Version - Add Signal Strength indecator - Add Time indecator - Fix Sound Language Prob...Most Popular ProjectsWBFS ManagerRawrAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)patterns & practices – Enterprise LibraryPHPExcelMicrosoft SQL Server Community & SamplesASP.NETMost Active Projectspatterns & practices – Enterprise LibraryjQuery Library for SharePoint Web ServicesNB_Store - Free DotNetNuke Ecommerce Catalog ModuleRhyduino - Arduino and Managed CodeBlogEngine.NETCommunity Forums NNTP bridgeCassandraemonMediaCoder.NETAndrew's XNA HelpersMicrosoft Silverlight Media Framework

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  • WCF client hell (2 replies)

    I've a remote service available via tcp://. When I add a service reference on my client project, VS doesn't create all proxy objects! I miss every xxxClient class, and I have only types used as parameters in my methods. I tried to start a new empty project, add the same service reference, and in this project I can see al proxy objects! It's an hell, what can I do? thanks

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  • windows 7 start menu's search "see more results" broken

    - by fluxtendu
    After searching in my start menu and clicking to "see more results", I got an error dialog: It "seems" that it should be search-ms:query=document an not search:query=document but where can I fix this? Additional info: New user account don't have the problem. Windows 7 Ultimate - RTM Disabling/Enabling again "Windows Search" (in Start Control Panel Programs Turn Windows Features on or off) doesn't fix it. (There's a HKEY_CLASSES_ROOT\Search in my registry that's not there normally.) - outdated see comments... Update: It could help me to diagnose, if someone send me any (hidden) files in %userprofile%\searches and some others pieces of registry: HKEY_CLASSES_ROOT\.search-ms HKEY_CLASSES_ROOT\.searchConnector-ms HKEY_CLASSES_ROOT\SearchFolder HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\SEARCH HKEY_CURRENT_USER\Software\Microsoft\Windows Search Any other related key that I don't have seen... Final Update: Resolved by the rastamanx answer (I can't accept the answer, because I have offer a bounty without accepted answer, vote for him please)

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  • SnagIt Live Writer Plug-in Updated

    - by Rick Strahl
    Ah, I love SnagIt from TechSmith and I use the heck out of it almost every day. So no surprise that I've decided some time ago to integrate SnagIt into a few applications that require screen shots extensively. It's been a while since I've posted an update to my small SnagIt Windows Live Writer plug-in. There have been a few nagging issues that have crept up with recent changes in the way SnagIt handles captures in recent versions and they have been addressed in this update of SnagIt. Personally I love SnagIt and use it extensively mostly for blogging, but also for writing documentation and articles etc. While there are many other (and also free) tools out there to do basic screen captures, SnagIt continues to be the most convenient tool for me with its nice built in capture and effects editor that makes creating professional looking captures childishly simple. And maybe even more importantly: SnagIt has a COM interface that can be automated and  makes it super easy to embed into other applications. I've built plugins for SnagIt as well as for one of my company's own tools, Html Help Builder. If you use the Windows Live Writer offline WebLog Editor to write blog posts and have a copy of SnagIt it's probably worth your while to check this out if you haven't already. In case you haven't, this plugin integrates SnagIt with Live Writer so you can easily capture and edit content and embed it into a post. Captures are shown in the SnagIt Preview editor where you can edit the image and apply image markup or effects, before selecting Finish (or Cancel). The final image can then be pasted directly into your Live Writer post. When installed the SnagIt plug-in shows up on the PlugIn list or in the Plug-Ins toolbar shortcut: Once you select the Plug in you get the capture window that allows you to customize the capture process which includes most of the useful SnagIt capture options: Once you're done capturing the image shows up in the SnagIt Image Editor and you can crop, mark up and apply effects. When done you click the Finish button and the image is embedded right into your blog post. Easy - how do you think the images in this blog entry got in here? The beauty of SnagIt is that it's all easily integrated - Capturing, editing and embedding, it only takes a few seconds to do it all especially if you save image effect presets in SnagIt. What's updated The main issue addressed in this update has to do with the plug-in updates the Live Writer window. When a capture starts Live Writer gets minimized to get out of the way to let you pick your capture source. When the capture is complete and the image has been embedded Live Writer is activated once again. Recent versions of SnagIt however had changed the Window positioning of SnagIt so that Live Writer ended up popping up back behind the SnagIt window which was pretty annoying. This update pushes Live Writer back to the top of the window stack using some delaying tactics in the code. There have also been a few small changes to the way the code interacts with the COM object which is more reliable if a capture fails or SnagIt blows up or is locked because it's already in a capture outside of the automation interface. Source Code SnagIt Automation is something I actually use a lot. As mentioned I've integrated this automation into Live Writer as well as my documentation tool Html Help Builder, which I use just about daily. The SnagIt integration has a similar interface in that application and provides similar functionality. It's quite useful to integrate SnagIt into other applications. Because it's quite useful to embed SnagIt into other apps there's source code that you can download and embed into your own applications. The code includes both the dialog class that is automated from Live Writer, as well as the basic capture component that captures images to a disk file. Resources Download the SnagIt Capture Plug-in Installer An MSI installer that you can run that will install the plug-in into Live Writer's PlugIns directory. Source Code to the SnagIt Capture Plug-in Contains the plug-in assembly, as well as the source code to the plug-in and the setup project.© Rick Strahl, West Wind Technologies, 2005-2011Posted in Live Writer  WebLog   Tweet (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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  • 10 CSS Grid Layout Generators

    - by Jyoti
    There are a lot of online generators which are of no use to any designers, however some can help designers to an extent. Some example of online generators are favicon generators, background generators, button generators, and badge generators. Some of the useful kinds are the ones that solve one purpose with quick and easy steps, especially useful for new designers, following is a list of some useful CSS grid layout generators. Grid Layout Generator By PageColumn: Blueprint Grid CSS Generator: Grid Generator By NetProtozo: Grid Generator By DegisnByGrid: Grid System Generator: YUI CSS Grid Builder: Variable Grid System: Firdamatic: CSS Sourced Ordered Variable Border Columed Page Maker: Grid Designer:

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  • SEO - Articles Are the Way Forward

    Writing articles for websites is different from other forms of writing because it uses SEO keywords, designed to improve your site and achieve higher rankings within the search engine. This type of writing is often referred to as copy writing or writing content. Writing articles for websites is one of the most effective marketing methods for a website and they are often used to promote the use of keywords and diverting traffic to a website.

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  • Is Code Complete still Code Complete? [closed]

    - by Peter Turner
    It's been quite a few years since Code Complete was published. I really love the book, I keep it in the bathroom at the office and read a little out of it once or twice a day. But I don't think it's possible to call Code Complete, "Code Complete" when it doesn't have language features that even Delphi has, like anonymous methods and generics. What key sections are missing from this book, and what should be deprecated?

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  • Can’t use Sub Reports and Shared Datasets in BIDS - Data Retrieval failed for the subreport '###', located at ### Please check the log files

    - by simonsabin
    SQL Server 2008 R2 brings us a great new feature of shared data sets. This allows datasets used by parameters and multiple reports to be defined in one place and used in multiple reports. I’ve been developing a report for SQLBits that required use of sub reports. They all use a shared data set for the agenda items. Initially I was developing in report builder but have now gone back to BIDS. In doing this however all the reports bust reporting the following error Data Retrieval failed for the subreport...(read more)

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  • NET Math Libraries

    - by JoshReuben
    NET Mathematical Libraries   .NET Builder for Matlab The MathWorks Inc. - http://www.mathworks.com/products/netbuilder/ MATLAB Builder NE generates MATLAB based .NET and COM components royalty-free deployment creates the components by encrypting MATLAB functions and generating either a .NET or COM wrapper around them. .NET/Link for Mathematica www.wolfram.com a product that 2-way integrates Mathematica and Microsoft's .NET platform call .NET from Mathematica - use arbitrary .NET types directly from the Mathematica language. use and control the Mathematica kernel from a .NET program. turns Mathematica into a scripting shell to leverage the computational services of Mathematica. write custom front ends for Mathematica or use Mathematica as a computational engine for another program comes with full source code. Leverages MathLink - a Wolfram Research's protocol for sending data and commands back and forth between Mathematica and other programs. .NET/Link abstracts the low-level details of the MathLink C API. Extreme Optimization http://www.extremeoptimization.com/ a collection of general-purpose mathematical and statistical classes built for the.NET framework. It combines a math library, a vector and matrix library, and a statistics library in one package. download the trial of version 4.0 to try it out. Multi-core ready - Full support for Task Parallel Library features including cancellation. Broad base of algorithms covering a wide range of numerical techniques, including: linear algebra (BLAS and LAPACK routines), numerical analysis (integration and differentiation), equation solvers. Mathematics leverages parallelism using .NET 4.0's Task Parallel Library. Basic math: Complex numbers, 'special functions' like Gamma and Bessel functions, numerical differentiation. Solving equations: Solve equations in one variable, or solve systems of linear or nonlinear equations. Curve fitting: Linear and nonlinear curve fitting, cubic splines, polynomials, orthogonal polynomials. Optimization: find the minimum or maximum of a function in one or more variables, linear programming and mixed integer programming. Numerical integration: Compute integrals over finite or infinite intervals, over 2D and higher dimensional regions. Integrate systems of ordinary differential equations (ODE's). Fast Fourier Transforms: 1D and 2D FFT's using managed or fast native code (32 and 64 bit) BigInteger, BigRational, and BigFloat: Perform operations with arbitrary precision. Vector and Matrix Library Real and complex vectors and matrices. Single and double precision for elements. Structured matrix types: including triangular, symmetrical and band matrices. Sparse matrices. Matrix factorizations: LU decomposition, QR decomposition, singular value decomposition, Cholesky decomposition, eigenvalue decomposition. Portability and performance: Calculations can be done in 100% managed code, or in hand-optimized processor-specific native code (32 and 64 bit). Statistics Data manipulation: Sort and filter data, process missing values, remove outliers, etc. Supports .NET data binding. Statistical Models: Simple, multiple, nonlinear, logistic, Poisson regression. Generalized Linear Models. One and two-way ANOVA. Hypothesis Tests: 12 14 hypothesis tests, including the z-test, t-test, F-test, runs test, and more advanced tests, such as the Anderson-Darling test for normality, one and two-sample Kolmogorov-Smirnov test, and Levene's test for homogeneity of variances. Multivariate Statistics: K-means cluster analysis, hierarchical cluster analysis, principal component analysis (PCA), multivariate probability distributions. Statistical Distributions: 25 29 continuous and discrete statistical distributions, including uniform, Poisson, normal, lognormal, Weibull and Gumbel (extreme value) distributions. Random numbers: Random variates from any distribution, 4 high-quality random number generators, low discrepancy sequences, shufflers. New in version 4.0 (November, 2010) Support for .NET Framework Version 4.0 and Visual Studio 2010 TPL Parallellized – multicore ready sparse linear program solver - can solve problems with more than 1 million variables. Mixed integer linear programming using a branch and bound algorithm. special functions: hypergeometric, Riemann zeta, elliptic integrals, Frensel functions, Dawson's integral. Full set of window functions for FFT's. Product  Price Update subscription Single Developer License $999  $399  Team License (3 developers) $1999  $799  Department License (8 developers) $3999  $1599  Site License (Unlimited developers in one physical location) $7999  $3199    NMath http://www.centerspace.net .NET math and statistics libraries matrix and vector classes random number generators Fast Fourier Transforms (FFTs) numerical integration linear programming linear regression curve and surface fitting optimization hypothesis tests analysis of variance (ANOVA) probability distributions principal component analysis cluster analysis built on the Intel Math Kernel Library (MKL), which contains highly-optimized, extensively-threaded versions of BLAS (Basic Linear Algebra Subroutines) and LAPACK (Linear Algebra PACKage). Product  Price Update subscription Single Developer License $1295 $388 Team License (5 developers) $5180 $1554   DotNumerics http://www.dotnumerics.com/NumericalLibraries/Default.aspx free DotNumerics is a website dedicated to numerical computing for .NET that includes a C# Numerical Library for .NET containing algorithms for Linear Algebra, Differential Equations and Optimization problems. The Linear Algebra library includes CSLapack, CSBlas and CSEispack, ports from Fortran to C# of LAPACK, BLAS and EISPACK, respectively. Linear Algebra (CSLapack, CSBlas and CSEispack). Systems of linear equations, eigenvalue problems, least-squares solutions of linear systems and singular value problems. Differential Equations. Initial-value problem for nonstiff and stiff ordinary differential equations ODEs (explicit Runge-Kutta, implicit Runge-Kutta, Gear's BDF and Adams-Moulton). Optimization. Unconstrained and bounded constrained optimization of multivariate functions (L-BFGS-B, Truncated Newton and Simplex methods).   Math.NET Numerics http://numerics.mathdotnet.com/ free an open source numerical library - includes special functions, linear algebra, probability models, random numbers, interpolation, integral transforms. A merger of dnAnalytics with Math.NET Iridium in addition to a purely managed implementation will also support native hardware optimization. constants & special functions complex type support real and complex, dense and sparse linear algebra (with LU, QR, eigenvalues, ... decompositions) non-uniform probability distributions, multivariate distributions, sample generation alternative uniform random number generators descriptive statistics, including order statistics various interpolation methods, including barycentric approaches and splines numerical function integration (quadrature) routines integral transforms, like fourier transform (FFT) with arbitrary lengths support, and hartley spectral-space aware sequence manipulation (signal processing) combinatorics, polynomials, quaternions, basic number theory. parallelized where appropriate, to leverage multi-core and multi-processor systems fully managed or (if available) using native libraries (Intel MKL, ACMS, CUDA, FFTW) provides a native facade for F# developers

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  • MVC's Html.DropDownList and "There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key '...'

    - by pjohnson
    ASP.NET MVC's HtmlHelper extension methods take out a lot of the HTML-by-hand drudgery to which MVC re-introduced us former WebForms programmers. Another thing to which MVC re-introduced us is poor documentation, after the excellent documentation for most of the rest of ASP.NET and the .NET Framework which I now realize I'd taken for granted. I'd come to regard using HtmlHelper methods instead of writing HTML by hand as a best practice. When I upgraded a project from MVC 3 to MVC 4, several hidden fields with boolean values broke, because MVC 3 called ToString() on those values implicitly, and MVC 4 threw an exception until you called ToString() explicitly. Fields that used HtmlHelper weren't affected. I then went through dozens of views and manually replaced hidden inputs that had been coded by hand with Html.Hidden calls. So for a dropdown list I was rendering on the initial page as empty, then populating via JavaScript after an AJAX call, I tried to use a HtmlHelper method: @Html.DropDownList("myDropdown") which threw an exception: System.InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'myDropdown'. That's funny--I made no indication I wanted to use ViewData. Why was it looking there? Just render an empty select list for me. When I populated the list with items, it worked, but I didn't want to do that: @Html.DropDownList("myDropdown", new List<SelectListItem>() { new SelectListItem() { Text = "", Value = "" } }) I removed this dummy item in JavaScript after the AJAX call, so this worked fine, but I shouldn't have to give it a list with a dummy item when what I really want is an empty select. A bit of research with JetBrains dotPeek (helpfully recommended by Scott Hanselman) revealed the problem. Html.DropDownList requires some sort of data to render or it throws an error. The documentation hints at this but doesn't make it very clear. Behind the scenes, it checks if you've provided the DropDownList method any data. If you haven't, it looks in ViewData. If it's not there, you get the exception above. In my case, the helper wasn't doing much for me anyway, so I reverted to writing the HTML by hand (I ain't scared), and amended my best practice: When an HTML control has an associated HtmlHelper method and you're populating that control with data on the initial view, use the HtmlHelper method instead of writing by hand.

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  • does ping command to a dns name uses DNS PTR type messages?

    - by TiagoM
    Okay I cant understand this, when I try to ping to a machine on my network using the name associated I get a response from that machine, thats normal.. But there are messages that the sender sends to the top machine (SOA) that I dont understand.. First he sends a type A and gets a response with the IP associated to the name used on the ping command, but after that.. the sender only sends (before each ping) messages of type PTR to the (SOA) Saying this: Standar query 0xf66c PTR 12.45.168.192.in-addr.arpa and SOA respond with: Standard query response 0xf66c No such name And before each ping they do this, I dont know why... I notice this using wireshark, thanks alot again for accept me here, being able to get some answer :)

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  • The last MVVM you'll ever need?

    - by Nuri Halperin
    As my MVC projects mature and grow, the need to have some omnipresent, ambient model properties quickly emerge. The application no longer has only one dynamic pieced of data on the page: A sidebar with a shopping cart, some news flash on the side – pretty common stuff. The rub is that a controller is invoked in context of a single intended request. The rest of the data, even though it could be just as dynamic, is expected to appear on it's own. There are many solutions to this scenario. MVVM prescribes creating elaborate objects which expose your new data as a property on some uber-object with more properties exposing the "side show" ambient data. The reason I don't love this approach is because it forces fairly acute awareness of the view, and soon enough you have many MVVM objects laying around, and views have to start doing null-checks in order to ensure you really supplied all the values before binding to them. Ick. Just as unattractive is the ViewData dictionary. It's not strongly typed, and in both this and the MVVM approach someone has to populate these properties – n'est pas? Where does that live? With MVC2, we get the formerly-futures  feature Html.RenderAction(). The feature allows you plant a line in a view, of the format: <% Html.RenderAction("SessionInterest", "Session"); %> While this syntax looks very clean, I can't help being bothered by it. MVC was touting a very strong separation of concerns, the Model taking on the role of the business logic, the controller handling route and performing minimal view-choosing operations and the views strictly focused on rendering out angled-bracket tags. The RenderAction() syntax has the view calling some controller and invoking it inline with it's runtime rendering. This – to my taste – embeds too much  knowledge of controllers into the view's code – which was allegedly forbidden.  The one way flow "Controller Receive Data –> Controller invoke Model –> Controller select view –> Controller Hand data to view" now gets a "View calls controller and gets it's own data" which is not so one-way anymore. Ick. I toyed with some other solutions a bit, including some base controllers, special view classes etc. My current favorite though is making use of the ExpandoObject and dynamic features with C# 4.0. If you follow Phil Haack or read a bit from David Heyden you can see the general picture emerging. The game changer is that using the new dynamic syntax, one can sprout properties on an object and make use of them in the view. Well that beats having a bunch of uni-purpose MVVM's any day! Rather than statically exposed properties, we'll just use the capability of adding members at runtime. Armed with new ideas and syntax, I went to work: First, I created a factory method to enrich the focuse object: public static class ModelExtension { public static dynamic Decorate(this Controller controller, object mainValue) { dynamic result = new ExpandoObject(); result.Value = mainValue; result.SessionInterest = CodeCampBL.SessoinInterest(); result.TagUsage = CodeCampBL.TagUsage(); return result; } } This gives me a nice fluent way to have the controller add the rest of the ambient "side show" items (SessionInterest, TagUsage in this demo) and expose them all as the Model: public ActionResult Index() { var data = SyndicationBL.Refresh(TWEET_SOURCE_URL); dynamic result = this.Decorate(data); return View(result); } So now what remains is that my view knows to expect a dynamic object (rather than statically typed) so that the ASP.NET page compiler won't barf: <%@ Page Language="C#" Title="Ambient Demo" MasterPageFile="~/Views/Shared/Ambient.Master" Inherits="System.Web.Mvc.ViewPage<dynamic>" %> Notice the generic ViewPage<dynamic>. It doesn't work otherwise. In the page itself, Model.Value property contains the main data returned from the controller. The nice thing about this, is that the master page (Ambient.Master) also inherits from the generic ViewMasterPage<dynamic>. So rather than the page worrying about all this ambient stuff, the side bars and panels for ambient data all reside in a master page, and can be rendered using the RenderPartial() syntax: <% Html.RenderPartial("TagCloud", Model.SessionInterest as Dictionary<string, int>); %> Note here that a cast is necessary. This is because although dynamic is magic, it can't figure out what type this property is, and wants you to give it a type so its binder can figure out the right property to bind to at runtime. I use as, you can cast if you like. So there we go – no violation of MVC, no explosion of MVVM models and voila – right? Well, I could not let this go without a tweak or two more. The first thing to improve, is that some views may not need all the properties. In that case, it would be a waste of resources to populate every property. The solution to this is simple: rather than exposing properties, I change d the factory method to expose lambdas - Func<T> really. So only if and when a view accesses a member of the dynamic object does it load the data. public static class ModelExtension { // take two.. lazy loading! public static dynamic LazyDecorate(this Controller c, object mainValue) { dynamic result = new ExpandoObject(); result.Value = mainValue; result.SessionInterest = new Func<Dictionary<string, int>>(() => CodeCampBL.SessoinInterest()); result.TagUsage = new Func<Dictionary<string, int>>(() => CodeCampBL.TagUsage()); return result; } } Now that lazy loading is in place, there's really no reason not to hook up all and any possible ambient property. Go nuts! Add them all in – they won't get invoked unless used. This now requires changing the signature of usage on the ambient properties methods –adding some parenthesis to the master view: <% Html.RenderPartial("TagCloud", Model.SessionInterest() as Dictionary<string, int>); %> And, of course, the controller needs to call LazyDecorate() rather than the old Decorate(). The final touch is to introduce a convenience method to the my Controller class , so that the tedium of calling Decorate() everywhere goes away. This is done quite simply by adding a bunch of methods, matching View(object), View(string,object) signatures of the Controller class: public ActionResult Index() { var data = SyndicationBL.Refresh(TWEET_SOURCE_URL); return AmbientView(data); } //these methods can reside in a base controller for the solution: public ViewResult AmbientView(dynamic data) { dynamic result = ModelExtension.LazyDecorate(this, data); return View(result); } public ViewResult AmbientView(string viewName, dynamic data) { dynamic result = ModelExtension.LazyDecorate(this, data); return View(viewName, result); } The call to AmbientView now replaces any call the View() that requires the ambient data. DRY sattisfied, lazy loading and no need to replace core pieces of the MVC pipeline. I call this a good MVC day. Enjoy!

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  • Deferred vs Immediate execution in Linq

    - by Jalpesh P. Vadgama
    In this post, We are going to learn about Deferred vs Immediate execution in Linq.  There an interesting variations how Linq operators executes and in this post we are going to learn both Deferred execution and immediate execution. What is Deferred Execution? In the Deferred execution query will be executed and evaluated at the time of query variables usage. Let’s take an example to understand Deferred Execution better. Example: Following is a code for that. using System; using System.Collections.Generic; using System.Linq; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { var customers = new List<Customer>( new[] { new Customer{FirstName = "Jalpesh",LastName = "Vadgama"}, new Customer{FirstName = "Vishal",LastName = "Vadgama"}, new Customer{FirstName = "Tushar",LastName = "Maru"} } ); var newCustomers = customers.Where(c => c.LastName == "Vadgama"); customers.Add(new Customer {FirstName = "Teerth", LastName = "Vadgama"}); foreach (var c in newCustomers) { Console.WriteLine(c.FirstName); } } public class Customer { public string FirstName { get; set; } public string LastName { get; set; } } } } More on my personal blog @www.dotnetjalps.com

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  • DIVIDE vs division operator in #dax

    - by Marco Russo (SQLBI)
    Alberto Ferrari wrote an interesting article about DIVIDE performance in DAX. This new function has been introduced in SQL Server Analysis Services 2012 SP1, so it is available also in Excel 2013 (which still doesn’t have other features/fixes introduced by following Cumulative Updates…). The idea that instead of writing: IF ( Sales[Quantity] <> 0, Sales[Amount] / Sales[Quantity], BLANK () ) you can write: DIVIDE ( Sales[Amount], Sales[Quantity] ) There is a third optional argument in DIVIDE that defines the result in case the denominator (second argument) is zero, and by default its value is BLANK, so I omitted the third argument in my example. Using DIVIDE is very important, especially when you use a measure in MDX (for example in an Excel PivotTable) because it raise the chance that the non empty evaluation for the result is evaluated in bulk mode instead of cell-by-cell. However, from a DAX point of view, you might find it’s better to use the standard division operator removing the IF statement. I suggest you to read Alberto’s article, because you will find that an expression applying a filter using FILTER is faster than using CALCULATE, which is against any rule of thumb you might have read until now! Again, this is not always true, and depends on many conditions – trying to simplify, we might say that for a simple calculation, the query plan generated by FILTER could be more efficient – but, as usual, it depends, and 90% of the times using FILTER instead of CALCULATE produces slower performance. Do not take anything for granted, and always check the query plan when performance are your first issue!

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  • Oracle WebLogic Server 12c Launch Event - Dec 1, 2011, 10am PT

    - by arungupta
    Calling all IT managers, architects, and developers, to find out how the new release of Oracle WebLogic Server 12c is: Designed to help you seamlessly move into the public or private cloud with an open, standards-based platform Built to drive higher value for your current infrastructure and significantly reduce development time and cost Optimized to run your solutions for Java Platform, Enterprise Edition (Java EE); Oracle Fusion Middleware; and Oracle Fusion Enhanced with transformational platforms and technologies such as Java EE 6, Oracle’s Active GridLink for RAC, Oracle Traffic Director, and Oracle Virtual Assembly Builder When ? Dec 1, 2011, 10am - 12pm PT Where ? Register online! Here are some other links for you to follow: blogs.oracle.com/weblogicserver @OracleWebLogic youtube.com/OracleWebLogic facebook.com/OracleWebLogic Steve Button's Blog Jeff West's Blog WebLogic Forums WebLogic @ OTN Almost ready to unwrap the ribbons, pop open the cork, at the start line ... or whatever fits your analogy :-) And in case you are wondering ... here is a snapshot of WebLogic 12c administration console snapshot:

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  • SharePoint 2010 Search Error 0x800703fa

    - by Ben
    We have migrated from SharePoint 2007 to 2010. Everything appears to be working correctly except for an intermitent error with search. Occastionally search results will crash for all of our sites and when we look up the coorliation id we get the following error: Exception when fetching results: System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Illegal operation attempted on a registry key that has been marked for deletion. (Exception from HRESULT: 0x800703FA) (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is: System.Runtime.InteropServices.COMException: Illegal operation attempted on a registry key that has been marked for deletion. (Exception from HRESULT: 0x800703FA) at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) at Microsoft.Office.Server.Search.Query.KeywordQueryInternal.Execute() at Microsoft.Office.Server.Search.Query.QueryInternal.Execute(QueryProperties properties) at Microsoft.Office.Server.Search.Administration.SearchServiceApplication.Execute(QueryProperties properties) at SyncInvokeExecute(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc) We reset IIS and the problem resolves itself for a while. Has anyone come across a perminant fix for this?

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  • Oracle AIM, Oracle ABF, and Siebel Results Roadmap Officially Retired as of January 31, 2011

    - by tom.spitz
    Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} It seems somehow appropriate that the first entry of the Oracle® Unified Method (OUM) blog is about the retirement of several of our legacy methods, most notably AIM Foundation.If you're reading this, you're probably aware that Oracle has been developing OUM to support the entire Enterprise IT lifecycle, including support for the successful implementation of every Oracle product. As Oracle has continued to acquire new companies and technologies, it has become essential that we also create a single, unified language and approach for implementation - across the Oracle ecosystem.With the release of OUM 5.1 in 2009, OUM provided full support for all enterprise application implementation projects including Oracle E-Business Suite R12, Siebel CRM, PeopleSoft Enterprise, and JD Edwards EnterpriseOne projects. In 2010, we released OUM training that supports the use of OUM on these types of projects.That support represented a major milestone in the evolution of OUM and enabled implementers to transition to OUM. Consequently, we announced a staggered retirement schedule for Oracle's legacy methods. On January 31, 2011 we announced the retirement of:Oracle Application Implementation Method (AIM)Oracle AIM for Business Flows (ABF)Siebel Results RoadmapLater this year, we will announce the retirement of Compass - the legacy PeopleSoft method - and Data Warehouse Method Fast Track.OUM is available free of charge to Oracle Gold, Platinum, and Diamond partners through the Oracle Partner Network (OPN) [OUM on OPN]. The OUM Customer Program allows customers to obtain copies of the method for their internal use by contracting with Oracle for an engagement of two weeks or longer meeting some additional minimum criteria.There be more retirement announcements in the coming months. For now it's "Adios AIM." Thanks for the memories...

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  • Reminder: True WCF Asynchronous Operation

    - by Sean Feldman
    A true asynchronous service operation is not the one that returns void, but the one that is marked as IsOneWay=true. Without this, client will always wait for valid response from server, blocking execution. Possible work-around is to generate asynchronous methods and subscribe to Completed event, but then it’s a pseudo asynchronous. Real fire-and-forget is with one way operations.

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  • Some date math fun

    - by drsql
    Note: This concept presented is pretty simple and I am not claiming that I am the first to do this… so if you were the one who came up with this, let me know and I will give you linkage Today I was needing to get the data for the current month for a query, and it hit me that I really didn’t have a good way to do this.  There were two common methods that people use: WHERE YEAR(MonthColumn) = YEAR(Getdate()) AND MONTH(MonthColumn) = MONTH(Getdate()) But this particular method is pretty horrible...(read more)

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  • Some date math fun

    - by drsql
    Note: This concept presented is pretty simple and I am not claiming that I am the first to do this… so if you were the one who came up with this, let me know and I will give you linkage Today I was needing to get the data for the current month for a query, and it hit me that I really didn’t have a good way to do this.  There were two common methods that people use: WHERE YEAR(MonthColumn) = YEAR(Getdate()) AND MONTH(MonthColumn) = MONTH(Getdate()) But this particular method is pretty horrible...(read more)

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