Question

I have a grid of items which is populated using databinding. In the grid I have a DataTemplate for certain cells. I need to access the DataContext of the root element (the one which is hosting the grid) so that I can access additional bindings to support my datatemplate.

So you have:

Window     Window.DataContext = TheDataSourceWithItemsAndSupports     DataGrid.ItemsSource = {Binding Items}         DataTemplate             ListBox.ItemsSource = {Binding Supports} 

I want the {Binding Supports} on TheDataSourceWithItemsAndSupports, but I don’t see how to do that. I tried specifying {Binding} but that always returns null. I also tried using RelativeSource FindAncestor, but that yields null too.

Any clues?

Answer 1

Maybe try

Window Name='TheWindow' ... ListBox.ItemsSource = {Binding DataContext.Supports, ElementName=TheWindow}