private static void OnSetCommandParameterCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
{
TreeView tv = dependencyObject as TreeView;
if (tv != null)
{
TreeViewSelectionChangedCommandBehavior behavior = GetOrCreateBehavior(tv);
behavior.CommandParameter = e.NewValue;
}
}
private static TreeViewSelectionChangedCommandBehavior GetOrCreateBehavior(TreeView treeView)
{
TreeViewSelectionChangedCommandBehavior behavior =
treeView.GetValue(SelectCommandBehaviorProperty) as TreeViewSelectionChangedCommandBehavior;
if (behavior == null)
{
behavior = new TreeViewSelectionChangedCommandBehavior(treeView);
treeView.SetValue(SelectCommandBehaviorProperty, behavior);
}
return(behavior);
}