public static bool WalkTreeViewItem(TreeView tree, TreeViewItem treeViewItem, object selectedValue)
{
if (treeViewItem.DataContext == selectedValue)
{
treeViewItem.SetValue(TreeViewItem.IsSelectedProperty, true);
treeViewItem.Focus();
treeViewItem.BringIntoView();
return true;
}
var itemsHostProperty = treeViewItem.GetType().GetProperty("ItemsHost", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
var itemsHost = itemsHostProperty?.GetValue(treeViewItem, null) as Panel;
if (itemsHost == null)
{
return false;
}
foreach (var item in itemsHost.Children.OfType<TreeViewItem>())
{
var oldExpanded = item.IsExpanded;
item.IsExpanded = true;
item.UpdateLayout();
if (WalkTreeViewItem(tree, item, selectedValue))
{
return true;
}
item.IsExpanded = oldExpanded;
}
return false;
}