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  • Web.Config is Cached

    - by SGWellens
    There was a question from a student over on the Asp.Net forums about improving site performance. The concern was that every time an app setting was read from the Web.Config file, the disk would be accessed. With many app settings and many users, it was believed performance would suffer. Their intent was to create a class to hold all the settings, instantiate it and fill it from the Web.Config file on startup. Then, all the settings would be in RAM. I knew this was not correct and didn't want to just say so without any corroboration, so I did some searching. Surprisingly, this is a common misconception. I found other code postings that cached the app settings from Web.Config. Many people even thanked the posters for the code. In a later post, the student said their text book recommended caching the Web.Config file. OK, here's the deal. The Web.Config file is already cached. You do not need to re-cache it. From this article http://msdn.microsoft.com/en-us/library/aa478432.aspx It is important to realize that the entire <appSettings> section is read, parsed, and cached the first time we retrieve a setting value. From that point forward, all requests for setting values come from an in-memory cache, so access is quite fast and doesn't incur any subsequent overhead for accessing the file or parsing the XML. The reason the misconception is prevalent may be because it's hard to search for Web.Config and cache without getting a lot of hits on how to setup caching in the Web.Config file. So here's a string for search engines to index on: "Is the Web.Config file Cached?" A follow up question was, are the connection strings cached? Yes. http://msdn.microsoft.com/en-us/library/ms178683.aspx At run time, ASP.NET uses the Web.Config files to hierarchically compute a unique collection of configuration settings for each incoming URL request. These settings are calculated only once and then cached on the server. And, as everyone should know, if you modify the Web.Config file, the web application will restart. I hope this helps people to NOT write code! Steve WellensCodeProject

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  • Web.Config is Cached

    - by SGWellens
    There was a question from a student over on the Asp.Net forums about improving site performance. The concern was that every time an app setting was read from the Web.Config file, the disk would be accessed. With many app settings and many users, it was believed performance would suffer. Their intent was to create a class to hold all the settings, instantiate it and fill it from the Web.Config file on startup. Then, all the settings would be in RAM. I knew this was not correct and didn't want to just say so without any corroboration, so I did some searching. Surprisingly, this is a common misconception. I found other code postings that cached the app settings from Web.Config. Many people even thanked the posters for the code. In a later post, the student said their text book recommended caching the Web.Config file. OK, here's the deal. The Web.Config file is already cached. You do not need to re-cache it. From this article http://msdn.microsoft.com/en-us/library/aa478432.aspx It is important to realize that the entire <appSettings> section is read, parsed, and cached the first time we retrieve a setting value. From that point forward, all requests for setting values come from an in-memory cache, so access is quite fast and doesn't incur any subsequent overhead for accessing the file or parsing the XML. The reason the misconception is prevalent may be because it's hard to search for Web.Config and cache without getting a lot of hits on how to setup caching in the Web.Config file. So here's a string for search engines to index on: "Is the Web.Config file Cached?" A follow up question was, are the connection strings cached? Yes. http://msdn.microsoft.com/en-us/library/ms178683.aspx At run time, ASP.NET uses the Web.Config files to hierarchically compute a unique collection of configuration settings for each incoming URL request. These settings are calculated only once and then cached on the server. And, as everyone should know, if you modify the Web.Config file, the web application will restart. I hope this helps people to NOT write code!   Steve WellensCodeProject

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  • The Winds of Change are a Blowin&rsquo;

    - by Ajarn Mark Caldwell
    For six years I have been an avid and outspoken fan and paying customer of SourceGear products…from Vault to Dragnet to Fortress and on to Vault Professional, but that is all changing now.  Not the fan part, but the paying customer part.  I’m still a huge fan.  I think that SourceGear does a great job with their product and support has been fantastic when needed (which is not very often).  I think that Eric Sink has done a fine job building a quality company and products, and I appreciate his contributions to the tech community through this blogging and books.  I still think their products are high quality and do a fantastic job of what they do.  But there’s the rub…what they do is no longer enough for me. As I have rebuilt our development team over the last couple of years, and we have begun to investigate Scrum and Kanban, I realize that I need more visibility into the progress of the team.  I need better project management tools, and this is where Vault Professional lags behind several other tools.  Granted, in the latest release (Vault 6.0) they added a nice time tracking feature, but I want more.  (Note, I did contact SourceGear about my quest for more, but apparently, the rest of their customer base has not been clamoring for this and so they have not built it.  Granted, I wasn’t clamoring for it either until just recently, but unfortunately for SourceGear, I want it now and don’t want to wait for them to build it into their system.) Ironically, it was SourceGear themselves who started to turn me on to the possibilities of other tools.  They built a limited integration with Axosoft OnTime which I read about several times on their support site (I used to regularly read and occasionally comment on their Support Forum).  I decided to check out OnTime and was very impressed with the tool for work item tracking and project management (not to mention their great Scrum Master in 10 Minutes video).  I fell in love with the capabilities of OnTime.  Unfortunately, the integration with Vault for source control management was, as I mentioned, limited.  I could have forfeited the integration between work items and source code, but there is too much benefit to linking check-ins to work items for me to give that up.  So then I did what was previously unthinkable for me, I considered switching not just the work tracking tool, but also the source code management tool.  This was really stepping outside my comfort zone because source code is Gold, and not to be trifled with.  When you find a good weapon to protect your gold, stick with it. I looked at Git and Tortoise SVN, but the integration methods for those was pretty rough compared to what I was used to.  The recommended tool from Axosoft’s point of view appeared to be RocketSVN, but I really wasn’t sure I wanted to go the “flavor of Subversion” route.  Then I started thinking about that other tool I liked back when I first chose to go with Vault, but couldn’t afford:  Team Foundation Server.  And what do you know…Microsoft has not only radically improved it over that version from back in 2006, but they also came to their senses about how it should be licensed, and it is much more affordable now.  So I started looking into the latest capabilities in the 2012 version, and I fell in love all over again. I really went deep on checking out the tools.  I watched numerous webcasts from Microsoft partners, went to a beta preview on Microsoft’s campus, and watched a lot of Channel 9 videos on the new ALM features (oooh…shiny).  Frankly, I was very impressed with the capabilities of the newest version, and figured this was probably our direction.  As an interesting twist of fate, one of my employees crossed paths with an ALM Consultant from Northwest Cadence, a local Microsoft Partner, and one of the companies that produced several of the webcasts that I had been watching.  So I gave Bryon a call and started grilling him to see if he really knew anything or was just another guy who couldn’t find a job so he called himself a consultant.  It turns out Bryon actually knows a lot, especially in an area that was becoming a frustration point for us: Branching strategies and automated builds (that’s probably a whole separate blog entry).  As we talked, Bryon suggested we look into doing a DTDPS (Developer Tools Deployment Planning Services) session with his company.  This is a service that can be paid for by Microsoft Enterprise Agreement planning services credits or SA training benefits, and, again, coincidentally, we had several that were just about to expire, so I put them to good use. The DTDPS sessions were great; and Bryon, Rick, and the rest of the folks at Northwest Cadence have been a pleasure to work with.  We have just purchased a new server for our TFS rollout and are planning the steps and options right now.  This is still a big project ahead of us to not only install and configure TFS, but also to load all of our source code (many different systems, not just one program) and transition to the new way of life with TFS, but I am convinced that it is the right move for my team at this point in time.  We need the new capabilities that are in alignment with Scrum and Kanban methodologies in order to more efficiently manage all the different projects that we have going on at one time. I would still wholeheartedly endorse SourceGear’s products and Axosoft’s OnTime for those whose needs are met by those tools, but for me and my team, I think that TFS is the right fit, and I am looking forward to the change.

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  • Async CTP (C# 5): How to make WCF work with Async CTP

    - by javarg
    If you have recently downloaded the new Async CTP you will notice that WCF uses Async Pattern and Event based Async Pattern in order to expose asynchronous operations. In order to make your service compatible with the new Async/Await Pattern try using an extension method similar to the following: WCF Async/Await Method public static class ServiceExtensions {     public static Task<DateTime> GetDateTimeTaskAsync(this Service1Client client)     {         return Task.Factory.FromAsync<DateTime>(             client.BeginGetDateTime(null, null),             ar => client.EndGetDateTime(ar));     } } The previous code snippet adds an extension method to the GetDateTime method of the Service1Client WCF proxy. Then used it like this (remember to add the extension method’s namespace into scope in order to use it): Code Snippet var client = new Service1Client(); var dt = await client.GetDateTimeTaskAsync(); Replace the proxy’s type and operation name for the one you want to await.

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  • When should JavaScript generate HTML?

    - by VirtuosiMedia
    I try to generate as little HTML from JavaScript as possible. Instead, I prefer to manipulate existing markup whenever I can and only generate HTML when I need to dynamically insert an element that isn't a good candidate for using Ajax. This, I believe, makes it far easier to maintain the code and quickly make changes to it because the markup is easier to read and trace. My rule of thumb is: HTML is for document structure, CSS is for presentation, JavaScript is for behavior. However, I've seen a lot of JS code that generates mounds of HTML, including entire forms and content-heavy modal dialogs. In general, which method is considered best practice? In what circumstances should JavaScript be used to generate HTML and when should it not?

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  • JPA - insert and retrieve clob and blob types

    - by pachunoori.vinay.kumar(at)oracle.com
    This article describes about the JPA feature for handling clob and blob data types.You will learn the following in this article. @Lob annotation Client code to insert and retrieve the clob/blob types End to End ADFaces application to retrieve the image from database table and display it in web page. Use Case Description Persisting and reading the image from database using JPA clob/blob type. @Lob annotation By default, TopLink JPA assumes that all persistent data can be represented as typical database data types. Use the @Lob annotation with a basic mapping to specify that a persistent property or field should be persisted as a large object to a database-supported large object type. A Lob may be either a binary or character type. TopLink JPA infers the Lob type from the type of the persistent field or property. For string and character-based types, the default is Clob. In all other cases, the default is Blob. Example Below code shows how to use this annotation to specify that persistent field picture should be persisted as a Blob. public class Person implements Serializable {    @Id    @Column(nullable = false, length = 20)    private String name;    @Column(nullable = false)    @Lob    private byte[] picture;    @Column(nullable = false, length = 20) } Client code to insert and retrieve the clob/blob types Reading a image file and inserting to Database table Below client code will read the image from a file and persist to Person table in database.                       Person p=new Person();                      p.setName("Tom");                      p.setSex("male");                      p.setPicture(writtingImage("Image location"));// - c:\images\test.jpg                       sessionEJB.persistPerson(p); //Retrieving the image from Database table and writing to a file                       List<Person> plist=sessionEJB.getPersonFindAll();//                      Person person=(Person)plist.get(0);//get a person object                      retrieveImage(person.getPicture());   //get picture retrieved from Table //Private method to create byte[] from image file  private static byte[] writtingImage(String fileLocation) {      System.out.println("file lication is"+fileLocation);     IOManager manager=new IOManager();        try {           return manager.getBytesFromFile(fileLocation);                    } catch (IOException e) {        }        return null;    } //Private method to read byte[] from database and write to a image file    private static void retrieveImage(byte[] b) {    IOManager manager=new IOManager();        try {            manager.putBytesInFile("c:\\webtest.jpg",b);        } catch (IOException e) {        }    } End to End ADFaces application to retrieve the image from database table and display it in web page. Please find the application in this link. Following are the j2ee components used in the sample application. ADFFaces(jspx page) HttpServlet Class - Will make a call to EJB and retrieve the person object from person table.Read the byte[] and write to response using Outputstream. SessionEJBBean - This is a session facade to make a local call to JPA entities JPA Entity(Person.java) - Person java class with setter and getter method annotated with @Lob representing the clob/blob types for picture field.

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  • Error in destroying object in Box2D/LibGDX

    - by Crypted
    I'm trying to delete an object when a collision happens. I have put the following code in the render method of the object so it would be outside of the physics calculations. public void render(SpriteBatch spriteBatch) { // some other code... body.setActive(false); body.getWorld().destroyBody(body); But I'm getting an run-time error which crashes the JVM and shows, AL lib: alc_cleanup: 1 device not closed Assertion failed! Program: C:\Program Files\Java\jre6\bin\javaw.exe File: /var/lib/hudson/jobs/libgdx-git/workspace/gdx/jni/Box2D/Dynamics/b2World.cpp, Line 133 Expression: m_bodyCount 0 Can anyone help me here?

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  • Silverlight Cream for March 10, 2010 -- #810

    - by Dave Campbell
    In this Issue: Andrea Boschin, Jeremy Likness(-2-), Andrew Veresov, Nokola, SilverLaw, Gill Cleeren, Jim Wightman and Jeremy Likness, Viktor Larsson(-2-), and Walter Ferrari. Shoutouts: Viktor Larsson has a post up about Silverlight Market Penetration ... hope to meet you at MIX10, Viktor! Gergely Orosz has posted the Slides and code for the presentation “An Introduction to Silverlight” It appears that if I miss a day, I can pretty much do an all-submittal post :) From SilverlightCream.com: Writing an AsyncLoader to enqueue long running operations Andrea Boschin has a tutorial on SilverlightShow where he's building up an asynch service to deal with a long-running app on the server. MVVM with MEF in Silverlight: Video Tutorial Jeremy Likness has a video tutorial up for helping beginners wire up MVVM and MEF to Silverlight. Source code for the app in the video is downloadable. MVVM with MEF in Silverlight Video Tutorial Part 2: Plugins and Metadata In part 2, Jeremy Likness redesigns the app using metadata to turn the shapes into objects, and then show how easy it is to add a new plugin... and the source for the app is downloadable. Binding a Converter Parameter Andrew Veresov has a nice code-filled solution up for those times that you need to bind a ConverterParameter value. EasyPainter: Lion Hair styling Nokola has not been idle with Easy Painter... now he's added "Lion Hair" to the list of stylings you can apply... guess if you want to change someone's 'mane' ... sorry! Twisting Navigation - Silverlight 3 SilverLaw has another control up - a "Twisting Navigation" control... very cool :) ... and since I'm behind the curve, he already has an update in the Expression Gallery as noted in his post, and a video tutorial on implementing it in an application... and if you understand German, turn up the sound :) Uploading and downloading images using a WCF service with Silverlight Gill Cleeren has a tutorial up at SilverlightShow on uploading and downloading images using WCF Services in Silverlight New Windows Phone 7 Community Developer Hub Jim Wightman and Jeremy Likness have a very cool Silverlight page up where you can paste the URL of your XAP in and have it display in a "Windows 7 Series Phone" ... and that's all I'm saying about that. XAML Transformation 101 Viktor Larsson is discussing Transforms in XAML and has a nice tutorial up that is easily the beginning of a carousel... you may also want to check out his other posts... I'm adding him to my list. Silverlight 4 Webcam Demo In this post, Viktor Larsson has a tutorial up for using the WebCam. This is from a beginner perspective, so if you haven't jumped in, now's a good time. How to extend Bing Maps Silverlight with an elevation profile graph - Part 1 Walter Ferrari has a post up at SilverlightShow discussing extensions to BingMaps such as creating routes using GeoCoding and Route Services plus drawing lines on the maps and getting coordinates of the points. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    MIX10

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  • Best of "The Moth" 2010

    - by Daniel Moth
    It is the time again (like in 2004, 2005, 2006, 2007, 2008, 2009) to look back at my blog for the past year and identify areas of interest that seem to be more prominent than others. After doing so, representative posts follow in my top 5 list (in random order). 1. This was the year where I had to move for the first time since 2004 my blog engine (blogger.com –> dasBlog), host provider (zen –> godaddy), web server technology and OS (apache on Linux –> IIS on Windows Server). My goal was not to break any permalinks or the look and feel of this website. A series of posts covered how I achieved that goal, culminating in a tool for others to use if they wanted to do the same: Tool to convert blogger.com content to dasBlog. Going forward I aim to be sharing more small code utilities like that one… 2. At work I am known for being fairly responsive on email, and more importantly never dropping email balls on the floor. This is due to my email processing system, which I shared here: Processing Email in Outlook. I will be sharing more tips with regards to making the best of the Office products. 3. There is no doubt in my mind that this is the year people will remember as the one where Microsoft finally fights back in the mobile space. Even though the new platform means my Windows Mobile book sales will dwindle :-), I am ecstatic about Windows Phone 7 both as a consumer and as a developer. On the release day, to get you started I shared the top 10 Windows Phone 7 developer resources. I will be sharing my tips from my experience in writing code for and consuming this new platform… 4. For my HPC developer friends using Visual Studio, I shared Slides and code for MPI Cluster Debugger and also gave you all the links you need for getting started with Dryad and DryadLINQ from MSR. Expect more from me on cluster development in the coming year… 5. Still in the HPC space, but actually also in the game and even mainstream development, the big disruption and opportunity comes in the form of GPGPU and, on the Microsoft platform, (currently) DirectCompute. Expect more from me on gpgpu development in the coming year… Subscribe via the link on the left to stay tuned for 2011… I wish you a very Happy New Year (with whatever definition of happiness works for you)! Comments about this post welcome at the original blog.

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  • Silverlight Cream for January 03, 2011 -- #1021

    - by Dave Campbell
    In this all-Submittal Issue: Gill Cleeren(-2-), Brian Noyes, Brian Genisio, René Schulte, and Andy Schwam(-2-). Above the Fold: Silverlight: "The INavigationContentLoader interface in Silverlight 4" Gill Cleeren WP7: "Sending Windows Phone Screenshots in an Email" René Schulte WCF RIA Services: "WCF RIA Services Part 10 - Exposing Domain Services To Other Clients" Brian Noyes Shoutouts: Want to know what it takes to be an MVP? Check out René Schulte's recap of 2010: Goodbye 2010 - Hello 2011 ... awesome, René! Rui Marinho sent me this post... it's WPF, but wow... WPF and Kinect! Kinect & WPF From SilverlightCream.com: The INavigationContentLoader interface in Silverlight 4 Gill Cleeren has a couple posts up... this first is a break-out of the INavigationContentLoader... what all can be done with it, in addition to the flow of the page load process broken out. Working with the RaiseCanExecuteChanged in MVVM Light (Silverlight) Gill Cleeren' latest post is a discussion of the Silverlight ICommand interface and Laurent Bugnion's RaiseCanExecuteChanged in MVVM Light, with example code. WCF RIA Services Part 10 - Exposing Domain Services To Other Clients Brian Noyes has Part 10 in his WCF RIA Services Tutorial series up at SilverlightShow ... with info on, for example, exposint an OData, SOAP, or REST/JSON endpoint, or how to consume them. Cross-Training in Silverlight & Flex–MVVM vs Presentation Model Brian Genisio finished the year off with this post in his on-going Silverlight/Flex seris comparing MVVM vs Presentation Model .. lots of good MVVM/ViewModel tips and code in this post. Sending Windows Phone Screenshots in an Email René Schulte is the perfect guy to be doing this... how about emailing a screenshot directly from inside an app, for instance Laurent's taking a screenshot from inside an app... too cool, Rene! Windows Phone 7 Application Development Tips Andy Schwam has a post up with tips he learned while creating his first WP7 app... lots of good tips, Gestures, Camera, ISO... check it out, could save you some time and tears :) WP7 Tip: Using the CameraCaptureTask for Windows Phone 7 Andy Schwam's most recent post is WP7 dev as well, and has a bunch of tips and code for using the camera, such as capturing an image, resizing, saving... good stuff. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • SQL Server DATA Tools CTP4 Released!

    - by hassanfadili
    SQL Server team has released the new SQL Server Data Tools CTP4. Congratulations and Thanks to Gert Drapers and his team with this great milestone. To lear more about this SSDT CTP4 Release, check: What’s new in SQL Server Data Tools CTP4?http://blogs.msdn.com/b/ssdt/archive/2011/11/21/what-s-new-in-sql-server-data-tools-ctp4.aspxSQL Server Data Tools CTP4 vs. VS2010 Database Projectshttp://blogs.msdn.com/b/ssdt/archive/2011/11/21/sql-server-data-tools-ctp4-vs-vs2010-database-projects.aspxTop VSDB->SSDT Project Conversion Issueshttp://blogs.msdn.com/b/ssdt/archive/2011/11/21/top-vsdb-gt-ssdt-project-conversion issues.aspxUninstalling SQL Server Developer Tools CTP3 (Code-named “Juneau”) http://blogs.msdn.com/b/ssdt/archive/2011/11/21/uninstalling-ssdt-ctp3-code-named-juneau.aspxThis actually points to a nifty PowerShell script to help you uninstall.Have Fun.v

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  • Visual Studio Talk Show #118 is now online - Command-Query Responsibility Separation (French)

    http://www.visualstudiotalkshow.com Erik Renaud: La sparation des responsabilits entre les commandes et les requtes Nous discutons avec Erik Renaud de la sparation des responsabilits entre les commandes et les requtes (Command-Query Responsibility Separation - CQRS). La plupart des applications lisent les donnes beaucoup plus frquemment qu'ils font des critures. Sur la base de cette dclaration, une bonne ide consiste sparer le code qui est responsable de lcriture des donnes du code qui est...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Programming languages, positional languages and natural languages

    - by Vitalij Zadneprovskij
    Some programming languages are modeled on machine code, like assembly languages. Other languages are modeled on a natural language, the English language. Others are not modeled on either machine code or natural language. Languages such as PROLOG, for example, don't follow either model. I came across this Perl module Lingua::Romana::Perligata, that allows to write programs using a syntax that is very similar to Latin. Are there programming languages that have less positional syntax? Are there other languages or modules that allow you to write in syntaxes inspired by other natural languages, like French, Hebrew or Farsi? There is a very long list on Wikipedia, but most of those projects are dead. There is a related question on StackOverflow. The answer that was accepted is "Use Google".

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  • MVC 2 Presentation &ndash; Final Demo

    - by Steve Michelotti
    In my presentation this past weekend at NoVa Code Camp, a member of the audience caught my final demo on video. In this demo, I combine multiple new features from MVC 2 to show how to build apps quickly with MVC 2. These features include: Template Helpers / Editor Templates Server-side/Client-side Validation Model Metadata for View Model HTML Encoding Syntax Dependency Injection Abstract Controllers Custom T4 Templates Custom MVC Visual Studio 2010 Code Snippets The projector screen is a little difficult to see during parts of the video – a video of the direct screencast can be seen here: MVC 2 in 2 Minutes.   Direct link to YouTube video here.

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  • Silverlight Cream for March 27, 2010 -- #822

    - by Dave Campbell
    In this Issue: MSDN, Bill Reiss, Charlie Kindel(-2-), SilverLaw, Scott Marlowe, Kenny Young, Andrea Boschin, Mike Taulty, Damon Payne, and Jeff Handley(-2-). Shoutouts: Scott Morrison has his material up for his talk at MIX 10: Silverlight 4 Business Applications Matthias Shapiro posted his MIX10 “Information Visualization in Silverlight” Slides and Code for MIX10 Information Visualization Talk Demos Dan Wahlin has his MIX10 material all posted as well: Syncing Audio, Video and Animations in Silverlight Timmy Kokke has an interesting MEF post up: Building extensions for Expression Blend 4 using MEF From SilverlightCream.com: How to: Add an Application Bar to Your Application In case you missed this MSDN post on adding an Application Bar to your WP7 app Simulating accelerometer data in the Windows Phone 7 emulator Got a Wii? How about a Wii remote? Bill Reiss shows how to use the Wii remote to simulate accelerometer data on the WP7 emulator ... really! Windows Phone 7 Series Icon Pack Charlie Kindel announced the release of a WP7 Icon pack ... great external MSDN link on using them as well. Windows Phone Developer Documentation Charlie Kindel also posted WP7 Documentation, and a quick overview of what you'll find ... samples, references, all good stuff to check out and download. GlossyTextblock Custom Control - Silverlight 3 SilverLaw has his GlossyTextblock rebuilt as a Custom Control and in the Expresseion Gallery. Check the blog for a screenshot. A Windows Phone 7 Silverlight TagList Scott Marlowe has a great post up for WP7 accessing his blog tag list via WCF and displaying the data on the emulator... wow! Dynamic Layout and Transitions in Expression Blend 4 Kenny Young has a great companion blog post to a demo app on Expression Gallery. There's also a link on the page to Kenny's MIX10 session Using XmlDefinition and XmlPrefix to better organize namespaces Andrea Boschin comes to our rescue about the maze of namespaces in XAML by using a solution from the RC: XmlDefinition and XmlPrefix Silverlight 4 RC – Socket Security Changes Mike Taulty is discussing changes in the RC with regard to sockets that have come about since he did his series of posts. Lots of good code. Cascading ItemsSource Bindings in Silverlight Damon Payne addresses an issue he came acros with multiple DataGrids on the same screen. He demonstrates the problem, and then demonstrates his solution. ContosoSales Application for RIA Services RC Jeff Handley posted about the refresh to the ContosoSales application shown in the PDC keynote, and details the changes. Lots of good code and links. DomainDataSource Filters and Parameters Jeff Handley has another post up about RIA Services and the fact that ControlParameter is gone... and he shows how to use ElementName binding instead. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Inserting and Deleting Sub Rows in GridView

    - by Vincent Maverick Durano
    A user in the forums (http://forums.asp.net) is asking how to insert  sub rows in GridView and also add delete functionality for the inserted sub rows. In this post I'm going to demonstrate how to this in ASP.NET WebForms.  The basic idea to achieve this is we just need to insert row data in the DataSource that is being used in GridView since the GridView rows will be generated based on the DataSource data. To make it more clear then let's build up a sample application. To start fire up Visual Studio and create a WebSite or Web Application project and then add a new WebForm. In the WebForm ASPX page add this GridView markup below:   1: <asp:gridview ID="GridView1" runat="server" AutoGenerateColumns="false" onrowdatabound="GridView1_RowDataBound"> 2: <Columns> 3: <asp:BoundField DataField="RowNumber" HeaderText="Row Number" /> 4: <asp:TemplateField HeaderText="Header 1"> 5: <ItemTemplate> 6: <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 7: </ItemTemplate> 8: </asp:TemplateField> 9: <asp:TemplateField HeaderText="Header 2"> 10: <ItemTemplate> 11: <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> 12: </ItemTemplate> 13: </asp:TemplateField> 14: <asp:TemplateField HeaderText="Header 3"> 15: <ItemTemplate> 16: <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox> 17: </ItemTemplate> 18: </asp:TemplateField> 19: <asp:TemplateField HeaderText="Action"> 20: <ItemTemplate> 21: <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click" Text="Insert"></asp:LinkButton> 22: </ItemTemplate> 23: </asp:TemplateField> 24: </Columns> 25: </asp:gridview>   Then at the code behind source of ASPX page you can add this codes below:   1: private DataTable FillData() { 2:   3: DataTable dt = new DataTable(); 4: DataRow dr = null; 5:   6: //Create DataTable columns 7: dt.Columns.Add(new DataColumn("RowNumber", typeof(string))); 8:   9: //Create Row for each columns 10: dr = dt.NewRow(); 11: dr["RowNumber"] = 1; 12: dt.Rows.Add(dr); 13:   14: dr = dt.NewRow(); 15: dr["RowNumber"] = 2; 16: dt.Rows.Add(dr); 17:   18: dr = dt.NewRow(); 19: dr["RowNumber"] = 3; 20: dt.Rows.Add(dr); 21:   22: dr = dt.NewRow(); 23: dr["RowNumber"] = 4; 24: dt.Rows.Add(dr); 25:   26: dr = dt.NewRow(); 27: dr["RowNumber"] = 5; 28: dt.Rows.Add(dr); 29:   30: //Store the DataTable in ViewState for future reference 31: ViewState["CurrentTable"] = dt; 32:   33: return dt; 34:   35: } 36:   37: private void BindGridView(DataTable dtSource) { 38: GridView1.DataSource = dtSource; 39: GridView1.DataBind(); 40: } 41:   42: private DataRow InsertRow(DataTable dtSource, string value) { 43: DataRow dr = dtSource.NewRow(); 44: dr["RowNumber"] = value; 45: return dr; 46: } 47: //private DataRow DeleteRow(DataTable dtSource, 48:   49: protected void Page_Load(object sender, EventArgs e) { 50: if (!IsPostBack) { 51: BindGridView(FillData()); 52: } 53: } 54:   55: protected void LinkButton1_Click(object sender, EventArgs e) { 56: LinkButton lb = (LinkButton)sender; 57: GridViewRow row = (GridViewRow)lb.NamingContainer; 58: DataTable dtCurrentData = (DataTable)ViewState["CurrentTable"]; 59: if (lb.Text == "Insert") { 60: //Insert new row below the selected row 61: dtCurrentData.Rows.InsertAt(InsertRow(dtCurrentData, row.Cells[0].Text + "-sub"), row.RowIndex + 1); 62:   63: } 64: else { 65: //Delete selected sub row 66: dtCurrentData.Rows.RemoveAt(row.RowIndex); 67: } 68:   69: BindGridView(dtCurrentData); 70: ViewState["CurrentTable"] = dtCurrentData; 71: } 72:   73: protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { 74: if (e.Row.RowType == DataControlRowType.DataRow) { 75: if (e.Row.Cells[0].Text.Contains("-sub")) { 76: ((LinkButton)e.Row.FindControl("LinkButton1")).Text = "Delete"; 77: } 78: } 79: }   As you can see the code above is pretty straight forward and self explainatory but just to give you a short explaination the code above is composed of three (3) private methods which are the FillData(), BindGridView and InsertRow(). The FillData() method is a method that returns a DataTable and basically creates a dummy data in the DataTable to be used as the GridView DataSource. You can replace the code in that method if you want to use actual data from database but for the purpose of this example I just fill the DataTable with a dummy data on it. The BindGridVew is a method that handles the actual binding of GridVew. The InsertRow() is a method that returns a DataRow. This method handles the insertion of the sub row. Now in the LinkButton OnClick event, we casted the sender to a LinkButton to determine the specific object that fires up the event and get the row values. We then reference the Data from ViewState to get the current data that is being used in the GridView. If the LinkButton text is "Insert" then we will insert new row to the DataSource ( in this case the DataTable) based on the rowIndex if not then Delete the sub row that was added. Here are some screen shots of the output below: On initial load:   After inserting a sub row:   That's it! I hope someone find this post useful!   Technorati Tags: ASP.NET,C#,GridView

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  • Frequent Disconnects ubuntu desktop 12.10 x64 intel 82579V e1000e

    - by user112055
    I'm having frequent disconnects with my new install of Ubuntu 12.10. I tried updating the kernel driver to the latest intel release to no avail. My expertise is spent. It happens anywhere between 1 min and 10 min. Any ideas? syslog: Dec 1 13:51:39 andromeda kernel: [ 972.188809] audit_printk_skb: 6 callbacks suppressed Dec 1 13:51:39 andromeda kernel: [ 972.188813] type=1701 audit(1354398699.418:199): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=6039 comm="chrome" reason="seccomp" sig=0 syscall=4 compat=0 ip=0x7f26777d9205 code=0x50000 Dec 1 13:51:39 andromeda kernel: [ 972.188817] type=1701 audit(1354398699.418:200): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=6039 comm="chrome" reason="seccomp" sig=0 syscall=4 compat=0 ip=0x7f26777d9205 code=0x50000 Dec 1 13:51:39 andromeda kernel: [ 972.188820] type=1701 audit(1354398699.418:201): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=6039 comm="chrome" reason="seccomp" sig=0 syscall=4 compat=0 ip=0x7f26777d9205 code=0x50000 Dec 1 13:51:39 andromeda kernel: [ 972.188823] type=1701 audit(1354398699.418:202): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=6039 comm="chrome" reason="seccomp" sig=0 syscall=4 compat=0 ip=0x7f26777d9205 code=0x50000 Dec 1 13:51:39 andromeda kernel: [ 972.188825] type=1701 audit(1354398699.418:203): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=6039 comm="chrome" reason="seccomp" sig=0 syscall=4 compat=0 ip=0x7f26777d9205 code=0x50000 Dec 1 13:51:39 andromeda kernel: [ 972.331419] type=1701 audit(1354398699.558:204): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=6039 comm="chrome" reason="seccomp" sig=0 syscall=2 compat=0 ip=0x7f26777d96b0 code=0x50000 Dec 1 13:53:12 andromeda NetworkManager[1115]: <info> (eth0): carrier now OFF (device state 100, deferring action for 4 seconds) Dec 1 13:53:12 andromeda kernel: [ 1064.894387] e1000e: e1000e: eth0 NIC Link is Down Dec 1 13:53:16 andromeda NetworkManager[1115]: <info> (eth0): device state change: activated -> unavailable (reason 'carrier-changed') [100 20 40] Dec 1 13:53:16 andromeda NetworkManager[1115]: <info> (eth0): deactivating device (reason 'carrier-changed') [40] Dec 1 13:53:16 andromeda NetworkManager[1115]: <info> (eth0): canceled DHCP transaction, DHCP client pid 5946 Dec 1 13:53:16 andromeda avahi-daemon[890]: Withdrawing address record for fe80::ea40:f2ff:fee2:4d86 on eth0. Dec 1 13:53:16 andromeda avahi-daemon[890]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::ea40:f2ff:fee2:4d86. Dec 1 13:53:16 andromeda avahi-daemon[890]: Interface eth0.IPv6 no longer relevant for mDNS. Dec 1 13:53:16 andromeda kernel: [ 1069.025288] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready Dec 1 13:53:16 andromeda avahi-daemon[890]: Withdrawing address record for 192.168.11.17 on eth0. Dec 1 13:53:16 andromeda avahi-daemon[890]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.11.17. Dec 1 13:53:16 andromeda avahi-daemon[890]: Interface eth0.IPv4 no longer relevant for mDNS. Dec 1 13:53:16 andromeda NetworkManager[1115]: <warn> DNS: plugin dnsmasq update failed Dec 1 13:53:16 andromeda NetworkManager[1115]: <info> ((null)): removing resolv.conf from /sbin/resolvconf Dec 1 13:53:16 andromeda dnsmasq[1907]: setting upstream servers from DBus Dec 1 13:53:16 andromeda dbus[800]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Dec 1 13:53:16 andromeda dbus[800]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> (eth0): carrier now ON (device state 20) Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> (eth0): device state change: unavailable -> disconnected (reason 'carrier-changed') [20 30 40] Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Auto-activating connection '82579V'. Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) starting connection '82579V' Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled... Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started... Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled... Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete. Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting... Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0] Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful. Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled. Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete. Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started... Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0] Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Beginning DHCPv4 transaction (timeout in 45 seconds) Dec 1 13:53:32 andromeda kernel: [ 1084.938042] e1000e: e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx Dec 1 13:53:32 andromeda kernel: [ 1084.938049] e1000e 0000:00:19.0: eth0: 10/100 speed: disabling TSO Dec 1 13:53:32 andromeda kernel: [ 1084.938815] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> dhclient started with pid 6080 Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete. Dec 1 13:53:32 andromeda dhclient: Internet Systems Consortium DHCP Client 4.2.4 Dec 1 13:53:32 andromeda dhclient: Copyright 2004-2012 Internet Systems Consortium. Dec 1 13:53:32 andromeda dhclient: All rights reserved. Dec 1 13:53:32 andromeda dhclient: For info, please visit https://www.isc.org/software/dhcp/ Dec 1 13:53:32 andromeda dhclient: Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> (eth0): DHCPv4 state changed nbi -> preinit Dec 1 13:53:32 andromeda dhclient: Listening on LPF/eth0/e8:40:f2:e2:4d:86 Dec 1 13:53:32 andromeda dhclient: Sending on LPF/eth0/e8:40:f2:e2:4d:86 Dec 1 13:53:32 andromeda dhclient: Sending on Socket/fallback Dec 1 13:53:32 andromeda dhclient: DHCPREQUEST of 192.168.11.17 on eth0 to 255.255.255.255 port 67 Dec 1 13:53:32 andromeda dhclient: DHCPACK of 192.168.11.17 from 192.168.11.1 Dec 1 13:53:32 andromeda dhclient: bound to 192.168.11.17 -- renewal in 33576 seconds. Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> (eth0): DHCPv4 state changed preinit -> reboot Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> address 192.168.11.17 Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> prefix 24 (255.255.255.0) Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> gateway 192.168.11.1 Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> hostname 'andromeda' Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> nameserver '192.168.11.1' Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> domain name 'hsd1.ca.comcast.net' Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Configure Commit) scheduled... Dec 1 13:53:32 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) started... Dec 1 13:53:32 andromeda avahi-daemon[890]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.11.17. Dec 1 13:53:32 andromeda avahi-daemon[890]: New relevant interface eth0.IPv4 for mDNS. Dec 1 13:53:32 andromeda avahi-daemon[890]: Registering new address record for 192.168.11.17 on eth0.IPv4. Dec 1 13:53:33 andromeda NetworkManager[1115]: <info> (eth0): device state change: ip-config -> activated (reason 'none') [70 100 0] Dec 1 13:53:33 andromeda NetworkManager[1115]: <info> ((null)): writing resolv.conf to /sbin/resolvconf Dec 1 13:53:33 andromeda dnsmasq[1907]: setting upstream servers from DBus Dec 1 13:53:33 andromeda dnsmasq[1907]: using nameserver 192.168.11.1#53 Dec 1 13:53:33 andromeda NetworkManager[1115]: <info> Policy set '82579V' (eth0) as default for IPv4 routing and DNS. Dec 1 13:53:33 andromeda NetworkManager[1115]: <info> Activation (eth0) successful, device activated. Dec 1 13:53:33 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) complete. Dec 1 13:53:33 andromeda dbus[800]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Dec 1 13:53:33 andromeda dbus[800]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Dec 1 13:53:33 andromeda avahi-daemon[890]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::ea40:f2ff:fee2:4d86. Dec 1 13:53:33 andromeda avahi-daemon[890]: New relevant interface eth0.IPv6 for mDNS. Dec 1 13:53:33 andromeda avahi-daemon[890]: Registering new address record for fe80::ea40:f2ff:fee2:4d86 on eth0.*. Dec 1 13:53:41 andromeda ntpdate[6154]: adjust time server 91.189.94.4 offset 0.000928 sec Dec 1 13:53:50 andromeda NetworkManager[1115]: <info> (eth0): carrier now OFF (device state 100, deferring action for 4 seconds) Dec 1 13:53:50 andromeda kernel: [ 1102.980003] e1000e: e1000e: eth0 NIC Link is Down Dec 1 13:53:54 andromeda NetworkManager[1115]: <info> (eth0): device state change: activated -> unavailable (reason 'carrier-changed') [100 20 40] Dec 1 13:53:54 andromeda NetworkManager[1115]: <info> (eth0): deactivating device (reason 'carrier-changed') [40] Dec 1 13:53:54 andromeda NetworkManager[1115]: <info> (eth0): canceled DHCP transaction, DHCP client pid 6080 Dec 1 13:53:54 andromeda avahi-daemon[890]: Withdrawing address record for fe80::ea40:f2ff:fee2:4d86 on eth0. Dec 1 13:53:54 andromeda avahi-daemon[890]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::ea40:f2ff:fee2:4d86. Dec 1 13:53:54 andromeda avahi-daemon[890]: Interface eth0.IPv6 no longer relevant for mDNS. Dec 1 13:53:54 andromeda avahi-daemon[890]: Withdrawing address record for 192.168.11.17 on eth0. Dec 1 13:53:54 andromeda avahi-daemon[890]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.11.17. Dec 1 13:53:54 andromeda kernel: [ 1107.025959] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready Dec 1 13:53:54 andromeda NetworkManager[1115]: <warn> DNS: plugin dnsmasq update failed Dec 1 13:53:54 andromeda NetworkManager[1115]: <info> ((null)): removing resolv.conf from /sbin/resolvconf Dec 1 13:53:54 andromeda avahi-daemon[890]: Interface eth0.IPv4 no longer relevant for mDNS. Dec 1 13:53:54 andromeda dnsmasq[1907]: setting upstream servers from DBus Dec 1 13:53:54 andromeda dbus[800]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Dec 1 13:53:54 andromeda dbus[800]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> (eth0): carrier now ON (device state 20) Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> (eth0): device state change: unavailable -> disconnected (reason 'carrier-changed') [20 30 40] Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Auto-activating connection '82579V'. Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) starting connection '82579V' Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled... Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started... Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled... Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete. Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting... Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0] Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful. Dec 1 13:54:10 andromeda kernel: [ 1123.167668] e1000e: e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx Dec 1 13:54:10 andromeda kernel: [ 1123.167675] e1000e 0000:00:19.0: eth0: 10/100 speed: disabling TSO Dec 1 13:54:10 andromeda kernel: [ 1123.168430] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled. Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete. Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started... Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0] Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Beginning DHCPv4 transaction (timeout in 45 seconds) Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> dhclient started with pid 6212 Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete. Dec 1 13:54:10 andromeda dhclient: Internet Systems Consortium DHCP Client 4.2.4 Dec 1 13:54:10 andromeda dhclient: Copyright 2004-2012 Internet Systems Consortium. Dec 1 13:54:10 andromeda dhclient: All rights reserved. Dec 1 13:54:10 andromeda dhclient: For info, please visit https://www.isc.org/software/dhcp/ Dec 1 13:54:10 andromeda dhclient: Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> (eth0): DHCPv4 state changed nbi -> preinit Dec 1 13:54:10 andromeda dhclient: Listening on LPF/eth0/e8:40:f2:e2:4d:86 Dec 1 13:54:10 andromeda dhclient: Sending on LPF/eth0/e8:40:f2:e2:4d:86 Dec 1 13:54:10 andromeda dhclient: Sending on Socket/fallback Dec 1 13:54:10 andromeda dhclient: DHCPREQUEST of 192.168.11.17 on eth0 to 255.255.255.255 port 67 Dec 1 13:54:10 andromeda dhclient: DHCPACK of 192.168.11.17 from 192.168.11.1 Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> (eth0): DHCPv4 state changed preinit -> reboot Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> address 192.168.11.17 Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> prefix 24 (255.255.255.0) Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> gateway 192.168.11.1 Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> hostname 'andromeda' Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> nameserver '192.168.11.1' Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> domain name 'hsd1.ca.comcast.net' Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Configure Commit) scheduled... Dec 1 13:54:10 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) started... Dec 1 13:54:10 andromeda avahi-daemon[890]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.11.17. Dec 1 13:54:10 andromeda dhclient: bound to 192.168.11.17 -- renewal in 35416 seconds. Dec 1 13:54:10 andromeda avahi-daemon[890]: New relevant interface eth0.IPv4 for mDNS. Dec 1 13:54:10 andromeda avahi-daemon[890]: Registering new address record for 192.168.11.17 on eth0.IPv4. Dec 1 13:54:11 andromeda NetworkManager[1115]: <info> (eth0): device state change: ip-config -> activated (reason 'none') [70 100 0] Dec 1 13:54:11 andromeda NetworkManager[1115]: <info> ((null)): writing resolv.conf to /sbin/resolvconf Dec 1 13:54:11 andromeda dnsmasq[1907]: setting upstream servers from DBus Dec 1 13:54:11 andromeda dnsmasq[1907]: using nameserver 192.168.11.1#53 Dec 1 13:54:11 andromeda NetworkManager[1115]: <info> Policy set '82579V' (eth0) as default for IPv4 routing and DNS. Dec 1 13:54:11 andromeda NetworkManager[1115]: <info> Activation (eth0) successful, device activated. Dec 1 13:54:11 andromeda NetworkManager[1115]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) complete. Dec 1 13:54:11 andromeda dbus[800]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Dec 1 13:54:11 andromeda dbus[800]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Dec 1 13:54:12 andromeda avahi-daemon[890]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::ea40:f2ff:fee2:4d86. Dec 1 13:54:12 andromeda avahi-daemon[890]: New relevant interface eth0.IPv6 for mDNS. Dec 1 13:54:12 andromeda avahi-daemon[890]: Registering new address record for fe80::ea40:f2ff:fee2:4d86 on eth0.*. Dec 1 13:54:19 andromeda ntpdate[6286]: adjust time server 91.189.94.4 offset 0.001142 sec $ lspci -v 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 04) Subsystem: Intel Corporation Device 2031 Flags: bus master, fast devsel, latency 0, IRQ 45 Memory at f7f00000 (32-bit, non-prefetchable) [size=128K] Memory at f7f39000 (32-bit, non-prefetchable) [size=4K] I/O ports at f040 [size=32] Capabilities: [c8] Power Management version 2 Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [e0] PCI Advanced Features Kernel driver in use: e1000e Kernel modules: e1000e $ modinfo e1000e filename: /lib/modules/3.5.0-19-generic/kernel/drivers/net/e1000e/e1000e.ko version: 2.1.4-NAPI license: GPL description: Intel(R) PRO/1000 Network Driver author: Intel Corporation, <[email protected]> srcversion: 0809529BE0BBC44883956AF alias: pci:v00008086d0000153Bsv*sd*bc*sc*i* alias: pci:v00008086d0000153Asv*sd*bc*sc*i* alias: pci:v00008086d00001503sv*sd*bc*sc*i* alias: pci:v00008086d00001502sv*sd*bc*sc*i* alias: pci:v00008086d000010F0sv*sd*bc*sc*i* alias: pci:v00008086d000010EFsv*sd*bc*sc*i* alias: pci:v00008086d000010EBsv*sd*bc*sc*i* alias: pci:v00008086d000010EAsv*sd*bc*sc*i* alias: pci:v00008086d00001525sv*sd*bc*sc*i* alias: pci:v00008086d000010DFsv*sd*bc*sc*i* alias: pci:v00008086d000010DEsv*sd*bc*sc*i* alias: pci:v00008086d000010CEsv*sd*bc*sc*i* alias: pci:v00008086d000010CDsv*sd*bc*sc*i* alias: pci:v00008086d000010CCsv*sd*bc*sc*i* alias: pci:v00008086d000010CBsv*sd*bc*sc*i* alias: pci:v00008086d000010F5sv*sd*bc*sc*i* alias: pci:v00008086d000010BFsv*sd*bc*sc*i* alias: pci:v00008086d000010E5sv*sd*bc*sc*i* alias: pci:v00008086d0000294Csv*sd*bc*sc*i* alias: pci:v00008086d000010BDsv*sd*bc*sc*i* alias: pci:v00008086d000010C3sv*sd*bc*sc*i* alias: pci:v00008086d000010C2sv*sd*bc*sc*i* alias: pci:v00008086d000010C0sv*sd*bc*sc*i* alias: pci:v00008086d00001501sv*sd*bc*sc*i* alias: pci:v00008086d00001049sv*sd*bc*sc*i* alias: pci:v00008086d0000104Dsv*sd*bc*sc*i* alias: pci:v00008086d0000104Bsv*sd*bc*sc*i* alias: pci:v00008086d0000104Asv*sd*bc*sc*i* alias: pci:v00008086d000010C4sv*sd*bc*sc*i* alias: pci:v00008086d000010C5sv*sd*bc*sc*i* alias: pci:v00008086d0000104Csv*sd*bc*sc*i* alias: pci:v00008086d000010BBsv*sd*bc*sc*i* alias: pci:v00008086d00001098sv*sd*bc*sc*i* alias: pci:v00008086d000010BAsv*sd*bc*sc*i* alias: pci:v00008086d00001096sv*sd*bc*sc*i* alias: pci:v00008086d0000150Csv*sd*bc*sc*i* alias: pci:v00008086d000010F6sv*sd*bc*sc*i* alias: pci:v00008086d000010D3sv*sd*bc*sc*i* alias: pci:v00008086d0000109Asv*sd*bc*sc*i* alias: pci:v00008086d0000108Csv*sd*bc*sc*i* alias: pci:v00008086d0000108Bsv*sd*bc*sc*i* alias: pci:v00008086d0000107Fsv*sd*bc*sc*i* alias: pci:v00008086d0000107Esv*sd*bc*sc*i* alias: pci:v00008086d0000107Dsv*sd*bc*sc*i* alias: pci:v00008086d000010B9sv*sd*bc*sc*i* alias: pci:v00008086d000010D5sv*sd*bc*sc*i* alias: pci:v00008086d000010DAsv*sd*bc*sc*i* alias: pci:v00008086d000010D9sv*sd*bc*sc*i* alias: pci:v00008086d00001060sv*sd*bc*sc*i* alias: pci:v00008086d000010A5sv*sd*bc*sc*i* alias: pci:v00008086d000010BCsv*sd*bc*sc*i* alias: pci:v00008086d000010A4sv*sd*bc*sc*i* alias: pci:v00008086d0000105Fsv*sd*bc*sc*i* alias: pci:v00008086d0000105Esv*sd*bc*sc*i* depends: vermagic: 3.5.0-19-generic SMP mod_unload modversions parm: copybreak:Maximum size of packet that is copied to a new buffer on receive (uint) parm: TxIntDelay:Transmit Interrupt Delay (array of int) parm: TxAbsIntDelay:Transmit Absolute Interrupt Delay (array of int) parm: RxIntDelay:Receive Interrupt Delay (array of int) parm: RxAbsIntDelay:Receive Absolute Interrupt Delay (array of int) parm: InterruptThrottleRate:Interrupt Throttling Rate (array of int) parm: IntMode:Interrupt Mode (array of int) parm: SmartPowerDownEnable:Enable PHY smart power down (array of int) parm: KumeranLockLoss:Enable Kumeran lock loss workaround (array of int) parm: CrcStripping:Enable CRC Stripping, disable if your BMC needs the CRC (array of int) parm: EEE:Enable/disable on parts that support the feature (array of int) parm: Node:[ROUTING] Node to allocate memory on, default -1 (array of int) parm: debug:Debug level (0=none,...,16=all) (int)

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  • ASP.NET MVC 3 Hosting :: ASP.NET MVC 3 First Look

    - by mbridge
    MVC 3 View Enhancements MVC 3 introduces two improvements to the MVC view engine: - Ability to select the view engine to use. MVC 3 allows you to select from any of your  installed view engines from Visual Studio by selecting Add > View (including the newly introduced ASP.NET “Razor” engine”): - Support for the next ASP.NET “Razor” syntax. The newly previewed Razor syntax is a concise lightweight syntax. MVC 3 Control Enhancements - Global Filters: ASP.NET MVC 3  allows you to specify that a filter which applies globally to all Controllers within an app by adding it to the GlobalFilters collection.  The RegisterGlobalFilters() method is now included in the default Global.asax class template and so provides a convenient place to do this since is will then be called by the Application_Start() method: void RegisterGlobalFilters(GlobalFilterCollection filters) { filters.Add(new HandleLoggingAttribute()); filters.Add(new HandleErrorAttribute()); } void Application_Start() { RegisterGlobalFilters (GlobalFilters.Filters); } - Dynamic ViewModel Property : MVC 3 augments the ViewData API with a new “ViewModel” property on Controller which is of type “dynamic” – and therefore enables you to use the new dynamic language support in C# and VB pass ViewData items using a cleaner syntax than the current dictionary API. Public ActionResult Index() { ViewModel.Message = "Hello World"; return View(); } - New ActionResult Types : MVC 3 includes three new ActionResult types and helper methods: 1. HttpNotFoundResult – indicates that a resource which was requested by the current URL was not found. HttpNotFoundResult will return a 404 HTTP status code to the calling client. 2. PermanentRedirects – The HttpRedirectResult class contains a new Boolean “Permanent” property which is used to indicate that a permanent redirect should be done. Permanent redirects use a HTTP 301 status code.  The Controller class  includes three new methods for performing these permanent redirects: RedirectPermanent(), RedirectToRoutePermanent(), andRedirectToActionPermanent(). All  of these methods will return an instance of the HttpRedirectResult object with the Permanent property set to true. 3. HttpStatusCodeResult – used for setting an explicit response status code and its associated description. MVC 3 AJAX and JavaScript Enhancements MVC 3 ships with built-in JSON binding support which enables action methods to receive JSON-encoded data and then model-bind it to action method parameters. For example a jQuery client-side JavaScript could define a “save” event handler which will be invoked when the save button is clicked on the client. The code in the event handler then constructs a client-side JavaScript “product” object with 3 fields with their values retrieved from HTML input elements. Finally, it uses jQuery’s .ajax() method to POST a JSON based request which contains the product to a /theStore/UpdateProduct URL on the server: $('#save').click(function () { var product = { ProdName: $('#Name').val() Price: $('#Price').val(), } $.ajax({ url: '/theStore/UpdateProduct', type: "POST"; data: JSON.stringify(widget), datatype: "json", contentType: "application/json; charset=utf-8", success: function () { $('#message').html('Saved').fadeIn(), }, error: function () { $('#message').html('Error').fadeIn(), } }); return false; }); MVC will allow you to implement the /theStore/UpdateProduct URL on the server by using an action method as below. The UpdateProduct() action method will accept a strongly-typed Product object for a parameter. MVC 3 can now automatically bind an incoming JSON post value to the .NET Product type on the server without having to write any custom binding. [HttpPost] public ActionResult UpdateProduct(Product product) { // save logic here return null } MVC 3 Model Validation Enhancements MVC 3 builds on the MVC 2 model validation improvements by adding   support for several of the new validation features within the System.ComponentModel.DataAnnotations namespace in .NET 4.0: - Support for the new DataAnnotations metadata attributes like DisplayAttribute. - Support for the improvements made to the ValidationAttribute class which now supports a new IsValid overload that provides more info on  the current validation context, like what object is being validated. - Support for the new IValidatableObject interface which enables you to perform model-level validation and also provide validation error messages which are specific to the state of the overall model. MVC 3 Dependency Injection Enhancements MVC 3 includes better support for applying Dependency Injection (DI) and also integrating with Dependency Injection/IOC containers. Currently MVC 3 Preview 1 has support for DI in the below places: - Controllers (registering & injecting controller factories and injecting controllers) - Views (registering & injecting view engines, also for injecting dependencies into view pages) - Action Filters (locating and  injecting filters) And this is another important blog about Microsoft .NET and technology: - Windows 2008 Blog - SharePoint 2010 Blog - .NET 4 Blog And you can visit here if you're looking for ASP.NET MVC 3 hosting

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  • Silverlight Cream for March 29, 2010 -- #824

    - by Dave Campbell
    In this Issue: smartyP(-2-), Al Pascual, Mike Taulty, Shawn Burke(-2-), Vikram Pendse, Tomasz Janczuk, Lee, and Alexey Zakharov. Shoutouts: Jeff Weber announced New Silverlight Game “Snow Spill” by Nick Avery of Liserd Arts Games John Papa summarized links to all the Silverlight and Windows Phone 7 Sessions from MIX 10 Tim Heuer has a post up about OData and the MIX10 feed: MIX10: Yet another way to view video content sessions using their OData feed From SilverlightCream.com: Creating a Windows Phone 7 Metro Style Pivot Application [Part 1] smartyP has a two-part video tutorial up on creating a WP7 pivot navigation app using Expression Blend. He's also looking for feedback. Creating a Windows Phone 7 Metro Style Pivot Application [Part 2] In part 2, smartyP adds gestures to his navigation. He also has some good external links listed. Al Pascual: My First Windows Phone 7 Application Al Pascual extends the MIX10 keynote WP7 sample by adding the ability to send tweets ... with all the code. Silverlight 4 RC and the “silent installation” Mike Taulty discusses and demonstrates installing an OOB app without having to visit a webpage to get it. In other words, pass it around on a USB drive, send it in email, etc. iPhone SDK vs Windows Phone 7 Series SDK Challenge, Part 1: Hello World! Shawn Burke has a 2-part series up comparing iPhone and WP7 development looking at how easy it is to code and lines of code produced by the tools. This first post is the classic Hello World. Check out the comments as well. iPhone SDK vs. Windows Phone 7 Series SDK Challenge, Part 2: MoveMe Shawn Burke's part 2 is comparing the classic iPhone 'MoveMe' app... again, check out all the comments. Silverlight 4 : Indic Support in Silverlight Vikram Pendse demonstrates using the Microsoft Indic Language Input tool. He has some screen shots and discussion about fonts in Silverlight. Comparison of HTTP polling duplex and net.tcp performance in Silverlight 4 RC Tomasz Janczuk is checking out Silverlight4 RC and has a comparison up of the performance of the three mechanisms for asynch data push for the server to the client/. Summary rows in Datagrid with multiple groups Lee revisted a post that displayed Summary/Totals in the group header to also support multiple groups now. Silverlight Commands Hacks: Passing EventArgs as CommandParameter to DelegateCommand triggered by EventTrigger Alexey Zakharov suggests a workaround 'InvokeDelegateCommandAction' to keep Blend from ignoring event args. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Don&rsquo;t break that sandbox

    - by Sahil Malik
    SharePoint 2010 Training: more information Hmm .. I hear that some soldiers are spreading rumors that it is OKAY to edit the WSS_Sandbox trust level inside of SharePoint. Afterall, it is just .NET code right? And it’s just a CAS policy, so why not make that tempting little tweet, and well – all I wanna do is call web services! Ummmm ..   DON’T DO IT!   Yes I know it’s just .NET code! But Microsoft has spent a great deal of time, resources, and thoughts in crafting up the boundary of what a sandbox solution can do, and what it cannot do. Soon as you make that tiny little tweak to allow calling web services, you just opened a bunch of security holes in your SharePoint installation. Not to mention, you broke the first cardinal rule of your SharePoint solutions, which is, “No Microsoft files were hurt in the building of this solution” Read full article ....

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  • Imperative vs. LINQ Performance on WP7

    - by Bil Simser
    Jesse Liberty had a nice post presenting the concepts around imperative, LINQ and fluent programming to populate a listbox. Check out the post as it’s a great example of some foundational things every .NET programmer should know. I was more interested in what the IL code that would be generated from imperative vs. LINQ was like and what the performance numbers are and how they differ. The code at the instruction level is interesting but not surprising. The imperative example with it’s creating lists and loops weighs in at about 60 instructions. .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; } 1: .method private hidebysig instance void ImperativeMethod() cil managed 2: { 3: .maxstack 3 4: .locals init ( 5: [0] class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> someData, 6: [1] class [mscorlib]System.Collections.Generic.List`1<int32> inLoop, 7: [2] int32 n, 8: [3] class [mscorlib]System.Collections.Generic.IEnumerator`1<int32> CS$5$0000, 9: [4] bool CS$4$0001) 10: L_0000: nop 11: L_0001: ldc.i4.1 12: L_0002: ldc.i4.s 50 13: L_0004: call class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> [System.Core]System.Linq.Enumerable::Range(int32, int32) 14: L_0009: stloc.0 15: L_000a: newobj instance void [mscorlib]System.Collections.Generic.List`1<int32>::.ctor() 16: L_000f: stloc.1 17: L_0010: nop 18: L_0011: ldloc.0 19: L_0012: callvirt instance class [mscorlib]System.Collections.Generic.IEnumerator`1<!0> [mscorlib]System.Collections.Generic.IEnumerable`1<int32>::GetEnumerator() 20: L_0017: stloc.3 21: L_0018: br.s L_003a 22: L_001a: ldloc.3 23: L_001b: callvirt instance !0 [mscorlib]System.Collections.Generic.IEnumerator`1<int32>::get_Current() 24: L_0020: stloc.2 25: L_0021: nop 26: L_0022: ldloc.2 27: L_0023: ldc.i4.5 28: L_0024: cgt 29: L_0026: ldc.i4.0 30: L_0027: ceq 31: L_0029: stloc.s CS$4$0001 32: L_002b: ldloc.s CS$4$0001 33: L_002d: brtrue.s L_0039 34: L_002f: ldloc.1 35: L_0030: ldloc.2 36: L_0031: ldloc.2 37: L_0032: mul 38: L_0033: callvirt instance void [mscorlib]System.Collections.Generic.List`1<int32>::Add(!0) 39: L_0038: nop 40: L_0039: nop 41: L_003a: ldloc.3 42: L_003b: callvirt instance bool [mscorlib]System.Collections.IEnumerator::MoveNext() 43: L_0040: stloc.s CS$4$0001 44: L_0042: ldloc.s CS$4$0001 45: L_0044: brtrue.s L_001a 46: L_0046: leave.s L_005a 47: L_0048: ldloc.3 48: L_0049: ldnull 49: L_004a: ceq 50: L_004c: stloc.s CS$4$0001 51: L_004e: ldloc.s CS$4$0001 52: L_0050: brtrue.s L_0059 53: L_0052: ldloc.3 54: L_0053: callvirt instance void [mscorlib]System.IDisposable::Dispose() 55: L_0058: nop 56: L_0059: endfinally 57: L_005a: nop 58: L_005b: ldarg.0 59: L_005c: ldfld class [System.Windows]System.Windows.Controls.ListBox PerfTest.MainPage::LB1 60: L_0061: ldloc.1 61: L_0062: callvirt instance void [System.Windows]System.Windows.Controls.ItemsControl::set_ItemsSource(class [mscorlib]System.Collections.IEnumerable) 62: L_0067: nop 63: L_0068: ret 64: .try L_0018 to L_0048 finally handler L_0048 to L_005a 65: } 66:   67: Compare that to the IL generated for the LINQ version which has about half of the instructions and just gets the job done, no fluff. .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 1: .method private hidebysig instance void LINQMethod() cil managed 2: { 3: .maxstack 4 4: .locals init ( 5: [0] class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> someData, 6: [1] class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> queryResult) 7: L_0000: nop 8: L_0001: ldc.i4.1 9: L_0002: ldc.i4.s 50 10: L_0004: call class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> [System.Core]System.Linq.Enumerable::Range(int32, int32) 11: L_0009: stloc.0 12: L_000a: ldloc.0 13: L_000b: ldsfld class [System.Core]System.Func`2<int32, bool> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate6 14: L_0010: brtrue.s L_0025 15: L_0012: ldnull 16: L_0013: ldftn bool PerfTest.MainPage::<LINQProgramming>b__4(int32) 17: L_0019: newobj instance void [System.Core]System.Func`2<int32, bool>::.ctor(object, native int) 18: L_001e: stsfld class [System.Core]System.Func`2<int32, bool> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate6 19: L_0023: br.s L_0025 20: L_0025: ldsfld class [System.Core]System.Func`2<int32, bool> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate6 21: L_002a: call class [mscorlib]System.Collections.Generic.IEnumerable`1<!!0> [System.Core]System.Linq.Enumerable::Where<int32>(class [mscorlib]System.Collections.Generic.IEnumerable`1<!!0>, class [System.Core]System.Func`2<!!0, bool>) 22: L_002f: ldsfld class [System.Core]System.Func`2<int32, int32> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate7 23: L_0034: brtrue.s L_0049 24: L_0036: ldnull 25: L_0037: ldftn int32 PerfTest.MainPage::<LINQProgramming>b__5(int32) 26: L_003d: newobj instance void [System.Core]System.Func`2<int32, int32>::.ctor(object, native int) 27: L_0042: stsfld class [System.Core]System.Func`2<int32, int32> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate7 28: L_0047: br.s L_0049 29: L_0049: ldsfld class [System.Core]System.Func`2<int32, int32> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate7 30: L_004e: call class [mscorlib]System.Collections.Generic.IEnumerable`1<!!1> [System.Core]System.Linq.Enumerable::Select<int32, int32>(class [mscorlib]System.Collections.Generic.IEnumerable`1<!!0>, class [System.Core]System.Func`2<!!0, !!1>) 31: L_0053: stloc.1 32: L_0054: ldarg.0 33: L_0055: ldfld class [System.Windows]System.Windows.Controls.ListBox PerfTest.MainPage::LB2 34: L_005a: ldloc.1 35: L_005b: callvirt instance void [System.Windows]System.Windows.Controls.ItemsControl::set_ItemsSource(class [mscorlib]System.Collections.IEnumerable) 36: L_0060: nop 37: L_0061: ret 38: } Again, not surprising here but a good indicator that you should consider using LINQ where possible. In fact if you have ReSharper installed you’ll see a squiggly (technical term) in the imperative code that says “Hey Dude, I can convert this to LINQ if you want to be c00L!” (or something like that, it’s the 2010 geek version of Clippy). What about the fluent version? As Jon correctly pointed out in the comments, when you compare the IL for the LINQ code and the IL for the fluent code it’s the same. LINQ and the fluent interface are just syntactical sugar so you decide what you’re most comfortable with. At the end of the day they’re both the same. Now onto the numbers. Again I expected the imperative version to be better performing than the LINQ version (before I saw the IL that was generated). Call it womanly instinct. A gut feel. Whatever. Some of the numbers are interesting though. For Jesse’s example of 50 items, the numbers were interesting. The imperative sample clocked in at 7ms while the LINQ version completed in 4. As the number of items went up, the elapsed time didn’t necessarily climb exponentially. At 500 items they were pretty much the same and the results were similar up to about 50,000 items. After that I tried 500,000 items where the gap widened but not by much (2.2 seconds for imperative, 2.3 for LINQ). It wasn’t until I tried 5,000,000 items where things were noticeable. Imperative filled the list in 20 seconds while LINQ took 8 seconds longer (although personally I wouldn’t suggest you put 5 million items in a list unless you want your users showing up at your door with torches and pitchforks). Here’s the table with the full results. Method/Items 50 500 5,000 50,000 500,000 5,000,000 Imperative 7ms 7ms 38ms 223ms 2230ms 20974ms LINQ/Fluent 4ms 6ms 41ms 240ms 2310ms 28731ms Like I said, at the end of the day it’s not a huge difference and you really don’t want your users waiting around for 30 seconds on a mobile device filling lists. In fact if Windows Phone 7 detects you’re taking more than 10 seconds to do any one thing, it considers the app hung and shuts it down. The results here are for Windows Phone 7 but frankly they're the same for desktop and web apps so feel free to apply it generally. From a programming perspective, choose what you like. Some LINQ statements can get pretty hairy so I usually fall back with my simple mind and write it imperatively. If you really want to impress your friends, write it old school then let ReSharper do the hard work for! Happy programming!

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