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Using Model – View – ViewModel with Silverlight

The View – Model – ViewModel design pattern, also known as MVVM, is getting more popular these days. I have found it extremely easy to use when developing very different applications and have used the design pattern recently in both ASP.NET, WPF and Silverlight applications. However easy as it might...

Posted to The Problem Solver by Maurice on Tue, Apr 7 2009
Filed under: Filed under: .NET, DevCenter, WPF, Silverlight
Want to download all MIX sessions?

Then you should check Mike Swanson’s blog post here . He has two batch files, the first downloads all MIX session recordings with in the format you like, the second renames them so it is easier to make sense of all the media file names. If you just want a list of all sessions with download links this...

Posted to The Problem Solver by Maurice on Tue, Mar 31 2009
Filed under: Filed under: .NET, LINQ, NetFx3, WCF, VB, webcast, DevCenter, WPF, IronPython, Silverlight, ASP.NET
Visual Basic QuickStarts and How-to Topics for the Composite Application Guidance for WPF and Silverlight

The P&P team have just release a VB version of the Prism quick starts. You can download the goods here . Enjoy!

Posted to The Problem Solver by Maurice on Wed, Mar 25 2009
Filed under: Filed under: .NET, VB, DevCenter, WPF, Silverlight
Looking back at the MVP Summit

Last week lots of MVP, myself included, where in Redmond visiting Microsoft on our yearly MVP pilgrimage. The MVP Summit is always a great event. Not only do we get to talk to the MS team members who actually design and build all the software we love and use but we also get to meet each other. And with...

Posted to The Problem Solver by Maurice on Sat, Mar 7 2009
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, WCF, VB, DevCenter, WPF, Silverlight, WF4
Patterns & Practices release Prism version 2

The Patterns & Practices group at Microsoft have just released Prism version 2. I am pretty exited about this because Prism version 2 supports both WPF and Silverlight. And as it makes extensive use of the Model - View - ViewModel amongst other design patterns it is a great place to learn, even if...

Posted to The Problem Solver by Maurice on Wed, Feb 18 2009
Filed under: Filed under: .NET, NetFx3, DevCenter, WPF, Silverlight
Data validation - Silverlight versus WPF part 2

In a previous blog post I pointed out that quite a difference between data validation between Silverlight and WFP. As I don’t think adding data validation in the UI is a good thing I focused on validation in the business object by throwing an exception when the value was not acceptable. As Beth pointed...

Posted to The Problem Solver by Maurice on Tue, Dec 30 2008
Filed under: Filed under: .NET, DevCenter, WPF, Silverlight
How to know when the DataContext changed in your control

The DataContext is a wonderful property, you can set it somewhere in the logical tree and any child control can just bind to properties without having to know where the DataContext was set. A great capability that makes live much simpler when writing XAML. But sometimes when building a control of some...

Posted to The Problem Solver by Maurice on Mon, Dec 29 2008
Filed under: Filed under: .NET, DevCenter, WPF, Silverlight
Data validation - Silverlight versus WPF

When I am creating business applications validating the data in business objects, and displaying any errors, is always a big deal. Even though WPF and Silverlight both use XAML and support data binding the default way to display errors is quite different. Now I am focusing on validation in the business...

Posted to The Problem Solver by Maurice on Wed, Dec 24 2008
Filed under: Filed under: .NET, NetFx3, DevCenter, WPF, Silverlight
WrapPanel in ListBox revisited

Last week logged about using a WrapPanel in a listBox and demonstrated how to get the content to wrap around, read about it here . Turns out the XAML can be even easier. In the previous post I used a ControlTemplate with a Grid to stop the WrapPanel from just expanding horizontally. Turns out there us...

Posted to The Problem Solver by Maurice on Mon, Dec 8 2008
Filed under: Filed under: .NET, NetFx3, VB, DevCenter, WPF, Silverlight
Unit testing in Silverlight part 2

Part 1 Part 2 Part 3 Part 4 In my previous post I described the basic setup of unit testing in Silverlight, you can read all about it here . The basics where very nice but lots of code we write in Silverlight has to do with networking and in Silverlight that means asynchronous code, something that is...

Posted to The Problem Solver by Maurice on Sun, Dec 7 2008
Filed under: Filed under: .NET, NetFx3, VB, DevCenter, WPF, Silverlight
PDC session download

Want to download and watch all PDC content? Then there are a couple of ways to get at them. The official way if to go through the session agenda at the conference site. See https://sessions.microsoftpdc.com/public/timeline.aspx . You see all sessions but it takes a bit of work. Another nice way is through...

Posted to The Problem Solver by Maurice on Sat, Nov 1 2008
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, VSTO, WCF, VB, webcast, DevCenter, ClickOnce, WPF, SqlCe, IronPython, Silverlight, PDC
Using the ReplicatorActivity in Parallel mode

I have heard quite a few times that the ReplicatorActivity can only be use in parallel mode with a custom activity. The reason being that you need an extra property to store the current child data. When the ReplicatorActivity works in sequential mode the following code works just fine: private void codeActivity1_ExecuteCode...

Posted to The Problem Solver by Maurice on Wed, Oct 22 2008
Filed under: Filed under: .NET, NetFx3, DevCenter, WPF
Red Gate to continue development of .NET Reflector

.NET Reflector, by Lutz Roeder, must be one of the most useful tools I have when developing .NET code. Usually it is the first thing I install right after Visual Studio not even waiting until I need it because I know I will. So the big news is that Red Gate, makers of the Ants profiler and lots of other...

Posted to The Problem Solver by Maurice on Wed, Aug 20 2008
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, VSTO, WCF, VB, DevCenter, WPF, SqlCe
Using a TransactionScopeActivity within a ReceiveActivity in a state machine workflow

Part 1 part 2 Part 3 Part 4 In two previous blog posts, part one and part two , I covered the fact that the ReceiveActivity and the TransactionScopeActivity don't work together very well. I demonstrated this using a sequential workflow and did show a, clumsy and hacky, workaround to get at least...

Posted to The Problem Solver by Maurice on Wed, Aug 13 2008
Filed under: Filed under: .NET, NetFx3, WCF, DevCenter, WPF
Visual Studio 2008 Service Pack 1 available

It is available from the subscriptions download at http://msdn.microsoft.com/en-us/subscriptions/default.aspx Get it while it is hot Enjoy!

Posted to The Problem Solver by Maurice on Mon, Aug 11 2008
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, VSTO, WCF, VB, DevCenter, ClickOnce, WPF, SqlCe
CodeCamp 2008

Afgelopen jaar hebben we het eerste CodeCamp in Nederland georganiseerd en dat was een groot succes. De meeste deelnemers vroegen om meer, sommige zelfs om een CodeCamp per kwartaal of een heel weekend lang. Nou hebben we dat laatste nog niet gedaan maar we zijn wel aan de slag gegaan om een nieuw CodeCamp...

Posted to The Problem Solver by Maurice on Sat, Aug 2 2008
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, VSTO, WCF, VB, DevCenter, ClickOnce, WPF, SqlCe
How to Download all of Visual Studio 2008 SP1

VS2008 SP1 Beta is quite a package. By default the installation downloads the packages as needed and when needed. Now that is just fine if you only need to install a single machine. But when you need to install multiple, possibly virtual, machines like I have to it just wastes a lot of bandwidth and...

Posted to The Problem Solver by Maurice on Fri, May 16 2008
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, VSTO, WCF, VB, DevCenter, ClickOnce, WPF, SqlCe
Project Mole or visual studio visualizers on steroids

Visual Studio visualizers are pretty cool and can help you quite a bit when debugging but you need to develop them and that just ads to the workload. So how about having someone else do it? Well Microsoft added a few visualizers to VS2008 and VS2008 but they are pretty much limited to text, html and...

Posted to The Problem Solver by Maurice on Wed, Apr 16 2008
Filed under: Filed under: .NET, Workflow, WCF, VB, DevCenter, WPF
Workflow Persistence Service using SQL Server Compact

As I mentioned previously I was working in a Workflow Persistence Service using SQL Server Compact as the back end store. Now this might not be the best persistence store to use in every application but it has a number of advantages. One of the main advantages is ClickOnce deployment. In the case of...

Posted to The Problem Solver by Maurice on Thu, Apr 10 2008
Filed under: Filed under: .NET, LINQ, NetFx3, VB, DevCenter, ClickOnce, WPF, SqlCe
Visual Studio 2008 and .NET Framework 3.5 Training Kit

Looking for more information about VS2008 and .NET 3.5? I suspect you might just be as there is a ton of new functionality and with the pace of everything coming out it isn't likely that you know it all To help learn the new stuff Microsoft has put a Visual Studio 2008 and .NET Framework 3.5 training...

Posted to The Problem Solver by Maurice on Mon, Feb 11 2008
Filed under: Filed under: .NET, LINQ, Workflow, VSTO, WCF, VB, DevCenter, WPF

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