ObservableCollection and ListBoxItem DataTemplate generation problem

Question

Something strange is going on with ObservableCollection.

I have the following code:

private readonly ObservableCollection _displa         


        

Answer 1

The wpf layout engine won't have been through the layout and arrange pass so your listboxitems won't have been given a size yet. Sticking in the message box will allow the background threads that do this run. Try forcing a call to Measure() on your items before looking at their size.