Download Source Code Task-It Series This post is part of a series of blog posts and videos about the Task-It (task management) application that I have been building with Silverlight 4 and Telerik's RadControls for Silverlight 4. For a full index of a posts, please go here. One of the posts listed in the index provides a full source download for the application. Why MVVM? As I'm gearing up to write a post about dynamic XAP loading with MEF, I'd like to first talk a bit about MVVM, the Model-View-ViewModel pattern, as I will be leveraging this pattern in my future posts. Your first question may be, "why do I need this...

In my previous post I talked about updating my development environment from Silverlight 4 Beta to Silverlight 4 RC (release candidate). After updating, I opened the solution for my Task-It project and found that several things were broken. I would've been surprised if it just worked as is! What disappointed me is that after spending a decent amount of time searching the web, I could not find information telling me what I needed to update/change...and wouldn't it be nice if there was a wizard to update it for you? What changed? I wish I had made notes along the line of each of the...

The other day I had finished up my Task-It Webinar, written a few blog posts, and knew the time had come to move from my Silverlight 4 Beta environment up to the latest RC (release candidate) bits that were released last Monday. What disappointed me when I went to the Silverlight 4 Information Page is that it told me what to install, but not what to uninstall first. Uninstalling I'm not entirely sure if I had to uninstall anything, or if installing the new stuff would just work, but in poking around the web I found posts stating that you must uninstall...

In my first blog post I will GridView extension that many people requested similar to ASP.NET UI experience – executing CRUD operations using buttons to execute. Bellow I will show one option to achieve this easily using the implementation of the Command pattern and attached behaviors approach available in Silverlight and WPF. Short overview of the command pattern Command pattern encapsulates a request as an object and gives it a known public interface. Using this pattern ensures that every object receives its own commands and provides a decoupling between sender and receiver. A sender is an object that invokes an operation (usually...

Now we starting getting into a more code-heavy portion of this series, thankfully though this means the groundwork is all set for the most part and after adding the modules we will have a complete application that can be provided with full source. The Jobs module will have two concerns- adding and maintaining jobs that can then be broadcast out to the website.  How they are displayed on the site will be handled by our admin system (which will just poll from this common database), so we aren't too concerned with that, but rather with getting the information into the...