How to expand WPF TreeView on single click of item

Question

Right now you have to double click or click the + icon. Is there any way to make it so if a user clicks anywhere on the node it expands?

Answer 1

Maybe is not the most elegant solution but this works:

    static DependencyObject VisualUpwardSearch<T>(DependencyObject source)
    {
        while (source != null && source.GetType() != typeof(T))
            source = VisualTreeHelper.GetParent(source);

        return source;
    }

then in the TreeViewItem.Selected Handler:

        private void Treeview_Selected(object sender, RoutedEventArgs e)
        {
            var treeViewItem = VisualUpwardSearch<TreeViewItem>(e.OriginalSource as DependencyObject) as TreeViewItem;
            if (treeViewItem != null) treeViewItem.IsExpanded = true;
        }

the VisualUpwardSearch magic is taken from here: http://stackoverflow.com/questions/592373/select-treeview-node-on-right-click-before-displaying-contextmenu/594662#594662

Regards