Validation is a topic that comes up quite frequently. One concern is how to honor DRY (don't repeat yourself) principles and create a framework that is reusable across layers. There are some very robust and tested frameworks out there, but sometimes they might be more than what you are looking for. In this post, I'll show you how to build a ...

OK, so it's not exactly ''out of the box'' but the most recent PRISM 4.0 Drop (drop 2) seems to contain something Silverlight developers have been begging for ... for quite some time. It's buried within the ''QuickStart'' folder under the ''BasicMVVM'' project. This project provides guidance for the Model-View-ViewModel pattern and is worth a ...

Series recap: PRISM, MEF, and MVVM Part 1 of 3: Unity GluePRISM, MEF, and MVVM Part 2 of 3: Making PRISM MEF FriendlyPRISM, MEF, and MVVM Part 3 of 3: Dynamic MEF Modules in PRISM In the final part of this series, I will show a dynamically loaded module (using PRISM) that takes full advantage of MEF. Here is a preview of the final product, ...

This post explores how to manage multiple view models across modules in a Prism-based Silverlight application. One powerful feature of Prism is the ability to dynamically load modules. This allows reduction of the XAP file size, as well as encourages a smaller memory footprint as certain modules are not brought into the application until they ...

In yesterday's post about Decoupled ChildWindow Dialogs in Silverlight using Prism, I demonstrated a way to use EventAggregator to decouple the implementation of a dialog from the code that requires the confirmation. In one example, I showed a code-behind click event that fired off the process, something like this: private void ...