Contents tagged with WCF

  • My Silverlight talk at Montreal .NET User Group

    This week I gave a Silverlight presentation at the Montreal .NET Community (

    Very few slides and lots of code, I built live from scratch a Silverlight business oriented application with Visual Studio 2008 and Expression Blend, here is what I demoed:

    • Entity Framework over a SQL Server db (beers!)
    • LINQ
    • WCF service + asynchronous call on the Silverlight 2 client + best practice  
    • Design and Animation with Blend + a few tips (tab key to collapse windows, properties search)
    • Tips to prevent an animation from running twice
    • DataGrid templating (custom columns, custom selected row view)
    • DataBinding
    • Isolated Storage cache [Learn more]
    • Custom alternative “no Silverlight installed” version as well a as a way to simulate a user without Silverlight in IE. I finally build a nice working version of the page with data for the user without forcing him to install Silverlight. [Learn more]
    • Quickly talked about some of the new features coming with Silverlight 3 (currently beta)
    Silverlight experience: Alternative ASP.NET version:

    Lot’s of content! I wanted to show a bit of Silverlight 3 but that was too much.

    You can download my code (*) here:

    As well as the slides (french):

    (*) The download include the asynchronous Database update as users edit the DataGrid.

    For those of you who are interested to hear about Silverlight 3 don’t worry you still have plenty of events coming!

  • My Silverlight session at DevTeach Montreal

    During my “Business oriented Silverlight 2 application” talk at DevTeach conference (december 2008) I used Visual Studio 2008 and Expression Blend to build an application that retrieves SQL server data (Beers!) through an Entity Framework model and exposes it to a Silverlight client via a WCF service and LINQ queries. I did some design and animation, added a ComboBox and DataGrid to display data and asynchronously update the model as users edit it. Then I showed how to use local cache on the client to optimize network traffic and finally applyed some Style to shape the UI.

    I had only 2 slides in my ppt deck, and here is my funny slide #2:

    I coded all that live on stage in 60 min without any errors!

    As promised here is the source code of the application I built live:


    [Beers Db by Andy Beaulieu]


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  • My Silverlight talk at Microsoft Innovation Briefing

    This morning I did a Silverlight 2 talk at Microsoft Montreal, during a half-day briefing called Building Compelling Websites on the Microsoft Platform.

    That was a 1 hour talk to present Silverlight 2, DeepZoom, Expression Blend and create from scratch a Silverlight 2 application which consume LINQ To SQL data exposed by a WCF service with VS2008.

    I would like to thank Paul Laberge for offering me the opportunity to do my very first presentation in english...

    Here are the links to the online demos I showed:


    Performances comparison with DHTML/Flex/SL1.0/SL2:

    Free charts controls:

    Medical sample (amazing) application:

    Here is a link to the powerpoint slides I used:

    Here is a zip file with the DeepZoom "Bill Gates" demo (hope you liked it!) and the Silverlight 2 + WCF + LINQ app I built live.

    You'll appreciate my funky UI.

    For the gentleman who asked the question I couldn't answer:

    Question: "Can you customize the default Loading animation the user get while waiting for a Silverlight application to start ?"

    Answer: "Yes! you can find a tutorial in the Quickstarts:"

  • Silverlight 2: migrating from alpha to beta 1

    Today I had to migrate a Silverlight Alpha 1.1 project to Silverlight 2 beta 1 for a client.

    As we had to expect there are a lot of changes!

    First thing to notice: after installing Silverlight 2 Tools for Visual Studio 2008 you won't be able to open your Silverlight 1.1 projects in VS2008, you have to migrate.

    The best way is to create a new Silverlight application and copy your old files there, then this article will be a huge help to fix your issues:
    MSDN: Breaking Changes in Silverlight 2

    Here are some of the changes I had to deal with:

    • HtmlDocument.GetElementByID -> HtmlDocument.GetElementById
    • System.Windows.WebApplication.RegisterScriptableObject -> HtmlPage.RegisterScriptableObject
    • System.Windows.WebApplication -> System.Windows.Application
    • [Scriptable] attribute -> [ScriptableType] for class,  [ScriptableMember] for methods

    And the one who surprised me the most: Web Services

    It is said that you have to regenerate your Web Service client proxies, but when looking for "Add Web Reference" in VS2008, I don't find it!! I just have "Add Service Reference" which is WCF for me. For ASP.NET 3.5 projects, you have both "Add Service Reference" for WCF and "Add Web Reference" for Web Services.
    I know that Silverlight 2 supports both WCF and Web Services, so where the hell is "Add Web Reference" ??

    Answer is: use "Add Service Reference"!
    Calling a Web Service in Silverlight 2 is very similar to calling a WCF Service, that means that you have to specify binding and endpoint.

    Second surprise: all web service calls must be asynchronous!
    You must implement the async pattern, that surprised me at first, but now I found that this is not a bad thing and just requires 2 or 3 lines of code, so get used to it!

    For syntax and code details I invite you to read this very good post :
    Calling web services with Silverlight 2

  • Hungry about Framework 3 ?

    Go to DinnerNow !!!

    This is a great sample application which use the latest Microsoft technologies !

    "DinnerNow is a fictious marketplace where customers can order food from local restaurants for delivery to their home or office. This sample is designed to demonstrate how you can develop a connected application using several new Microsoft technologies."

    And the list of technologies used is amazing :

    • Windows Communication Foundation
    • Windows Workflow Foundation
    • Windows Presentation Foundation
    • Windows CardSpace
    • Windows Powershell
    • IIS7
    • ASP.NET Ajax Extensions
    • Virtual Earth
    • Gadgets
    • Linq
    • .NET Compact Framework

    The entire DinnerNow sample application can be downloaded from CodePlex :

    There is also a cool video (but it breaks before the end...) :