WPF Listbox + Expander events
问题 I have an Expander in the ItemTemplate of a ListBox. Renders fine. The issue I have run into is that I would like the ListBox_SelectionChanged event to fire when the expander is expanded and/or selected. The MouseDown event does not seem to bubble up to the ListBox. What I need is the SelectedIndex of the ListBox. Because the ListBox_SelectionChanged does not get fired, the index is -1 and I cannot determine which item has been selected. The ListBox_SelectionChanged Event is fired if a user