[Question] Can I set a value in a ViewModel reacting to an Event in the View?

[SuperJMN]

Can I set a value in a ViewModel reacting to an Event in the View?

For instance, when a WebView control starts loading content, the ContentLoading  event is invoked. When it has finished loading the content, the LoadCompleted event is invoked.

I would like to have a property in my ViewModel that is set to true/false when those events are raised. For example, a IsLoading property.

Then, I could show a ProgressRing when appropriate.

[skendrot]

If there is an event on a control, you can use the EventTriggerBehavior. Then you can use the ChangePropertyAction

[ghost]

What will be the TargetObject if I will use ChangePropertyAction though? It is not a control in the view, a property of the ViewModel is the one that must be changed.

[nigel-sampson]

You would set the TargetObject to the view model, typically with a binding expression TargetObject="{Binding}".

[ghost]

Oh, thanks!