mvvm light - messaging

Question

I'm curently teaching myself the MVVM pattern. I've hit my first snag with the concept of messaging. I know messaging is contained in the mvvm-light toolkit. But I cannot find an example of usage anywhere (no sample projects are provided in the download).

If anyone can direct me to some information as to how to use messaging in that toolkit, that would be ace.

Thanks

score 8 · Answer 1 · answered Jan 18 '11 at 23:10

I have posted an example of using Messaging here, as part of my Intro to MVVM Light series.

My goal in this example is to send a message indicating that navigation is needed. The VM can't manage the navigation so it sends a message to the view. We do this in three steps:

Create a class to contain the message that is to be passed
In the view model, instantiate the message class and broadcast the message
Within MainPage.xaml.cs register for the message and handle it when received

The complete source code is posted and also available for download.

Thanks Jesse. I've read your stuff in the past and always find it helpful. I'll check out your series. — onefootswill, Jan 19 '11 at 14:16

score 6 · Accepted Answer · answered Dec 15 '10 at 16:37

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I found the following article on the subject. The subject line seems a little unrelated but that link is for part 2 of the article and if you read and scroll down a bit you will find info on the RelayCommand, Messenger, EventToCommand, and ICleanup.

http://www.codeproject.com/KB/silverlight/IssueVisionSilverlightPt2.aspx

Good luck.

answered Dec 15 '10 at 16:37

Mario Levesque

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Thats looks really good. I don't know why my Google searches did not pick that one up. Thanks very much. – onefootswill Dec 19 '10 at 08:54

score 0 · Answer 3 · answered Dec 14 '10 at 12:01

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http://blog.galasoft.ch/archive/2009/09/27/mvvm-light-toolkit-messenger-v2-beta.aspx

Here abit about it.

/Bo

answered Dec 14 '10 at 12:01

bomanden

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Thanks bomanden. I have also downloaded a project from the Codeplex site with some messaging. I should be able to figure it out from there. – onefootswill Dec 15 '10 at 02:45

score 0 · Answer 4 · edited May 23 '17 at 12:11

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I posted some simple MVVM Light messaging code on this other question with sample compiled code and explanations.

Send a empty Message or Notification with MVVM toolkit light

Cheers, Mario

edited May 23 '17 at 12:11

Community

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answered Jan 05 '11 at 16:12

Mario Levesque

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mvvm light - messaging

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