Today one guy from our dev team met some problems with binding of datagrid selected items. Because of SelectedItems is readonly property, we cannot create two way binding for it. After a short discussion we decided to create DataGridSelectedChanged command behavior which will inform our model about selected...

Here’s what I wanted to do: A Silverlight project User logs in A service runs and displays data upon successful login Quite simple right? In ‘pure’ Silverlight, one could probably do this in like 15 minutes, but I wanted to do this using Prism following the MVVM (Model-View-ViewModel) pattern. I added...

For some reason the family of design patterns that exist around the Model View Controller pattern seem to be an elusive band of characters. The first time I encountered Model View Controller I studied the text hard trying to understand how the Strategy , Observer and Composite patterns worked together...

Over the years I have spent a fair amount of time thinking about design patterns surrounding the presentation layer . Just as your values as a grown-up are often determined by experiences you have as a child – I think my interest in these patterns stem from frustrations I had as a newbie developer. When...

This is an extension to my previous blog where I showed my first application using Prism and Silverlight. As for this article, I just want to share the "gotcha's" I learned through a slightly more complex and a real-world (ish) application. See the entire source code here and when you run it...

Laurent Bugnion just published MVVM Light Toolkit V3 Alpha 3 which support WPF 4 and Silverlight 4! I published, yesterday a short post in French on my Tech Head Brothers portal about Silverlight 4 Beta, Drop Target et MVVM which shows the usage of this new version of EventToCommand combined with Silverlight...

Another article in the ‘- Silverlight 4’ series (read the first two here: DragNDrop, Right-Click Save As and Local File Access ). In this one we’ll talk about using the ICommand feature, now implemented in Silverlight. Read the announcement in Tim Heuer’s own words here . The commanding infrastructure...

With the increasing popularity of Silverlight as an application development framework the discussion of patterns has grown louder and louder. Fortunately the majority of developers building Silverlight applications have agreed on a pattern that fits well in the Silverlight world called Model-View-ViewModel...

The subject of Dependency Injection (DI) and Inversion of Control (IoC) containers has received a lot of attention over the last few years.  Building applications that are loosely coupled has become more and more popular (and for good reason) especially in applications that have a lot of dependencies...

UPDATE : Thanks to everyone who voted! It looks like I'll be presenting on Syncing Audio, Video and Animations in Silverlight Applications at MIX10. MIX10 is right around the corner which should be a lot of fun especially if you’re interested in Web and Rich Internet Application (RIA) development. If...