Question

I’m trying to perform AOP operations on view models that is being binded in the views. I’ve read some concepts and examples on MVVM. I noticed the use of DataTemplate which listens to ViewModel changes and performs the binding automatically.

I’d like to perform some initializations on the view model before binding, how can I do this with WPF/MVVM?

Thanks.

Ways of binding. . .

Through data context

view.DataContext = viewModel;

Through contents and templates

<DataTemplate DataType="{x:Type vm:SampleViewModel}">
<vw:SampleDisplayView />
</DataTemplate>

i’d like to intercept the view and viewmodel and initialize them before binding occurs.

Update:
I was able to intercept the view model through DataContextChanged event. Now I need the view to be initialized as well.

Answer 1

I found a way to do this. I implemented ViewLocator as most toolkits have this.

ViewLocator is implemented through attached behavior, having me to look for the viewmodel and do initializations before assigning it to the datacontext.