I have to admit that I may have rolled my eyes a bit when I first learned about the KnockoutJS library. It sounded too much like forcing a square peg into a round hole. Isn’t Model-View-Controller (MVC) already it’s own pattern? Does it make sense to apply something like Model-View-ViewModel (MVVM) to HTML? I already had enough issues dealing with ...

I created a quick video to help you get started with using Jounce. The video starts with a blank slate, steps through installation of Jounce and the creation of a sample view model for a simple contact record that includes validation. You can access the video directly at http://vimeo.com/jeremylikness/jounce-getting-started, or view it below: ...

I'm pleased to announce the official release of Jounce 2.0 for Silverlight 5. There are quite a number of new features available that I'll review in this post. Most significantly, of course, the code base has been updated specifically to target Silverlight 5. A number of bug fixes, feature requests, and Silverlight 5 features have been added. The ...

Throughout the short history of the MVVM design pattern, several methods have originated for populating Views with their ViewModels.  One of the most common methods is to use one of the frameworks (PRISM, MVVM Light, Jounce, among others).  Typically, the ViewModel is registered with an IOC container and retrieved when ...

Jounce is the result of building composite Silverlight enterprise applications for a variety of verticals since Silverlight 3.0 and finding the common problems that needed to be solved. I found many frameworks to be too heavy for the task and always wondered why more did not tap into the native advantages that the Managed Extensibility Framework ...

This is a quick walkthrough to demonstrate how to make what I call ''clean'' design-time view models. These are view models that provide design-time data for your application, but don't embed that data in the final product. The release DLL and XAP files will only contain run-time support. First, fire up Visual Studio and create a new Silverlight ...

I'm exploring the phone more and more and came across the case of allowing the user to enter digits. One thing to keep in mind on the phone is that the form factor requires approaches to input that are different from the traditional desktop. A desktop application might handle numeric entry by simply filtering the text box, but that assumes a ...

I recently released a new open source project called simply UltraLight.mvvm. The purpose of this project is to make it easier to build MVVM-based applications that support tombstoning (a must) on Windows Phone 7. The DLL is 22KB and the source is less than 300 lines of code. With that, the framework supports: Commands Command binding for ...

Yesterday I wrote about an ultra light Windows Phone 7 MVVM Framework and mentioned that I would deal with tombstoning in a later post. This is the post. Sterling makes tombstoning very easy because it handles serialization of just about any type of object. To show an example, we'll start with the concept of a view model that holds a set of ...

I've been doing more work on Windows Phone 7 applications. Because of the smaller footprint of the phone and the way the application is hosted, I don't believe the phone requires the same types of tools and frameworks as the browser. Sharing code and services is something that is obviously important, but while I am a huge advocate of the Managed ...