How to get TreeViewItem from HierarchicalDataTemplate item?

Question

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

It looks like this:

Answer 1

Do you need the TreeViewItem because you're going to modify what is being displayed? If that is the case, I'd recommend using a Style to change how the item is being displayed instead of using code-behind instead of directly modifying the TreeViewItem. It should hopefully be cleaner.