Question

I have a TreeView which uses a HierarchicalDataTemplate to bind its data.

It looks like this:

<TreeView x:Name='mainTreeList' ItemsSource='{Binding MyCollection}>   <TreeView.Resources>     <HierarchicalDataTemplate       DataType='{x:Type local:MyTreeViewItemViewModel}'       ItemsSource='{Binding Children}'>       <!-- code code code -->     </HierarchicalDataTemplate>   </TreeView.Resources> </TreeView> 

Now, from the code-behind of say the main window, I want to get the current selected TreeViewItem. However, if I use:

this.mainTreeList.SelectedItem; 

The selectedItem is of type MyTreeViewItemViewModel. But I want to get the ‘parent’ or ‘bound’ TreeViewItem. I do not pass that to my TreeViewItemModel object (wouldn’t even know how).

How can I do this?

Answer 1

From Bea Stollnitz‘s blog entry about this, try

TreeViewItem item = (TreeViewItem)(mainTreeList     .ItemContainerGenerator     .ContainerFromIndex(mainTreeList.Items.CurrentPosition));