New Post: How do you display MessageBox from Business Logic without breaking MVVM?

Hi,

Based on my understanding of your application, a correct way to display message boxes from your Model could be:

1. Create an event in your Model to alert the ViewModel when a situation that requires user interaction arises.
2. In your ViewModel, use InteractionRequest<T> in order to handle the display of the message box.
   

You can find more the information about how to implement InteractionRequest<T> here:

• Chapter 6: Advanced MVVM Scenarios - Using Interaction Request Objects
  

Hope this helps,

Federico Martinez
http://blogs.southworks.net/fmartinez