Question

I have a combo box on a xaml form (MainWindow).

I set the Items source to an ObservableCollection in the code behind. To populate the Combo box I used Relative Source (it sits inside an ItemsControl), which worked great (without it, if did not populate):

ItemsSource="{Binding SelectableItems, RelativeSource={RelativeSource AncestorType={x:Type Window}}}"

I have now factored out the ObservableCollection into a seperate View Model Class, named ‘MainWindowViewModel’, the combo box does not populate.

I have set the DataContext of the MainWindow to my ViewModel and have checked that it populates other controls as expected, which it does.

How should I construct the RelativeSource so the combo box populates?

Thanks

Joe

Answer 1

I needed to add the Path at the end, thus:

ItemsSource="{Binding SelectableItems, RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=DataContext.SelectableItems}"