NYC DevReady: MVVM - Session 5 (of 5) - Leveraging MVVM Inside PRISM
Blog Post
Implementing an MVVM MessageBus with XAML
Description
Using a Messag Bus to communicate between ViewModels is a very common activity when building an application based on MVVM. In this video, I show how you can build a Message Bus that can be created on a per-page basis and easily connected to the ViewModels on a page using XAML.
For a deeper written explanation of this approach, and to download the source code for the project seen in the video, check out my blog post on Slickthought.net.
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The Discussion
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Scptrez Just so everyone is not having to change the xaml in Blend. When you add a object data source it asks you for the key of the object at the top of the dialog window.
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Ganesh Any reason you are not using event aggregators provided by prism?
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JeffBrand @Ganesh: Not really. This was more of an effort to illustrate different ways to incorporate XAML and design-time support rather than deal with event routing /messaging per se. PRISM is great, but for a lot of apps it is also overkill so this was just a nice, simple way to get some of the goodness provided by things like Event Aggregator without having to dive into PRISM.