I would like to have column headers in group headers. this is easy with one group level.
How to get group level from Expander:
private void Expander_Loaded(object sender, RoutedEventArgs e)
Expander expander = sender as Expander;
TextBlock textBlock = expander.FindName("GroupHeaderText") as TextBlock;
//????? how to get group level?
textBlock.Text = "GroupHeader1/2";
Thanks for help in advance!