In this post, we will look at the IUIVisualizer , and bring together some some of the concepts we’ve talked about already through a new sample – a simple picture viewer: viewer: The The application grabs all the images from the user’s photo folder and then displays each

In this post, I will go over the simple message visualizers available in the MVVM Helpers Helpers toolkit. Essentially the idea is that it is fairly common to want to display display a simple message from the ViewModel to the user.

A question I got recently was how to manage Radio Buttons with bindings – in this instance, instance, the sample code was trying to map a single value to a set of Radio Buttons based based on an enumeration set. The original implementation was using a Value Converter to

The main project I’ve been working on the past few months has been a rRNA sequencing application. application. It’s a joint project involving Microsoft Research and the University of of Texas in Austin.

I know I said I was going to cover some services next, but I got a request last night to to show how to rename TreeView nodes (ala Explorer) using the MVVM pattern in WPF. The The solution is quite easy and elegant and I thought I’d share it here. First,

In this post, we’ll explore the service locator (called ServiceProvider in the the library) and introduce the specific services included with the MVVM Helper library (as as of 1.05 anyway).

In the previous post, I provided a link to the project template you can use to start a a new MVVM project using the JulMar MVVM library. Here's the two links in case you didn't didn't get them before:

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 be is seems to confuse people as I have seen some terrible examples where people make a complete

Using the declarative DomainDataSource that is part of the upcoming Silverlight 3 RIA services makes it quite easy to work with data. All you need to do is add a DomainDataSource control to the the XAML, point it to the generated DomainContext class (in this case NorthwindContext) and tell it which method to use to load the data from the web service(in this case LoadCustomers). Next add a DataGrid to display the data and you are good to go. < UserControl

Note: This blog post is written using the .NET NET framework 4.0 Beta 2 With Windows Workflow Foundation 3 it was possible to rehost the workflow designer in your own application. But possible is about all there was to say about it as it was pretty hard to do anything beyond the basics. With Windows Workflow Foundation 4 live has become much better on the rehosting front In fact it is possible to create the fully functional and useful workflow editor below in about 200

I can’t say I am a fan of the way the TryCatch activity is implemented in Windows Workflow Foundation 4. For starters there is a Finally block where you can add some activities you want to execute. Sounds nice and very much like the try/catch/finally code construct we have in C# or Visual Basic. Except that it behaves in a subtlety different way.

As you may have heard Windows Workflow Foundation 4 is not an upgrade from Windows Workflow Foundation 3 (or 3.5). The version numbers might suggest that the previous version was quite mature but in fact it refers to the version of the .NET NET framework.