Is Logical Ancestor Of
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Media; public static class PopupHelper { public static bool IsLogicalAncestorOf(this UIElement ancestor, UIElement child) { if (child != null) { FrameworkElement obj = child as FrameworkElement; while (obj != null) { FrameworkElement parent = VisualTreeHelper.GetParent(obj) as FrameworkElement; obj = parent == null ? obj.Parent as FrameworkElement : parent as FrameworkElement; if (obj == ancestor) return true; } } return false; } }