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EventToCommand clarifications

Jun 5, 2013 at 11:35 PM
I'm bit new to WPF and MVVM.
I'm trying to develop some kind of re-usable view-models
to be used by others.

Its like;
I'm creating a public interface for a particular view-model and provide its abstract implementation.
people who are using this library would be able to inherit from my abstract view-model and extend the view-model as they neeed and bind to their Views.

What my requirement is to provide a uniform way to binding
all the Button, Datagrid, ComboBox events to the viewmodel.

When googling I saw others have used MVVMLight "EventToCommand" implementation within the "Interaction.Triggers", like the below code snip.
    <i:EventTrigger EventName="SelectionChanged">

Further, I want to clarify that if a button to be used/click using mouse or keyboard.
how the Interaction.Triggers needs to be implemented or placed in the View/Xaml.

Thanks in advance providing me your prompt answers for the above issues.