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how to update WindowViewModel when there is a change in StatusBarViewModel

Answer 1

+1 A:

The MVVM Light Toolkit provides a Messenger class that is designed for exactly this purpose. Here's a sample on how to use it for VM to VM communication: http://chriskoenig.net/2010/07/05/mvvm-light-messaging/.

Chris Koenig 2010-08-06 05:16:15

how can i achieve this using DelegateCommand

suman 2010-08-06 06:15:01

To do that would require that one VM know about the other in order to call methods on it. Not sure that's the best way to do it. AS I understand it, Commands are more designed to enable the View talk back to the ViewModel, not for one VM to talk to another VM...

Chris Koenig 2010-08-06 11:54:21

Answer 2

A:

use the eventaggregator from prism. You dont have to use the whole prism library...just that part. I have used this very successfully in an enterprise app that I am working on...

ecathell 2010-08-06 13:12:14

Could you please share any sample application of prism using eventaggregator

suman 2010-08-09 05:21:46

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how to update WindowViewModel when there is a change in StatusBarViewModel

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