WPF - Bound treeview not updating root items

Question

I\'m using a WPF TreeView control, which I\'ve bound to a simple tree structure based on ObservableCollections. Here\'s the XAML:

Answer 1

You are setting ItemsSource = root which happens to implement IEnumerable but is not in and of itself observable. Even though you have a Children property which is observable, that's not what you're binding the TreeView to so the TreeView doesn't have any way of listening to changes that occur through the Children property.

I would drop IEnumerable from the Node class altogether. Then set treeView.ItemsSource = root.Children;

Answer 2

if 'root' is an ObservableCollection your treeview will update. is 'root' an observable collection, or is root a node that is in an observable collection? seeing your binding for the items source would help to answer this question. as you are assigning it in code you might just be setting it to be a single element, not a collection