mvvm-light and silverlight 4 compatibility

Question

Hi,

I've downloaded the mvvm light toolkit source 4157, and try to use the EventToCommand.SL sample. It works well in Visual Studio 2010, if I use the silverlight 3 framework.

But if I select the silverlight 4 version (EventToCommand.SL project properties), nothing appears : the ViewModel method associated with the Command property is never executed. The setter of the Command property of the EventToCommmand class is not reached !

Is there something that I missed ? Or is there a workaround ?

Thanks

Answer 1

By saying "EventToCommand.SL project properties", do you mean that you're Right-Clicking on the EventToCommand.SL project, and changing the version of the framework that the sample runs under? If so, it's probably a SL3 vs. SL4 reference error. There are 5 sets of binaries that ship with MVVM Light - SL3, SL4, WP7 and WPF35sp1 and WPF4. Make sure that you're sample is referencing the SL4 binaries instead of the SL3 ones.