Question

I have a DataForm where I have specified a DataTemplate for ItemTemplate. ItemsSource is bound to a List property of ViewModel. Wherenever List property changes, DataForm’s ItemsSource is updated through notify property change mechanism.

So far, so good. Problem: whenever List property data changes, template is also recreated. I know this because I have a custom control inside a template, so I see that a constructor is fired twice. First time during InitializeComponent call, and second time when List is populated with data from the service.

Is this normal behavior?

Answer 1

Final conclusion is that template is recreated whenever ItemsSource is assigned a new List