视觉树

 1  　 　　 /// <summary>
 2         /// 获取指定类型的可视父对象
 3         /// </summary>
 4         /// <typeparam name="T">指定类型</typeparam>
 5         /// <param name="obj">传入的对象</param>
 6         /// <returns></returns>
 7         public static T GetParentObject<T>(DependencyObject obj) where T : FrameworkElement
 8         {
 9             DependencyObject parent = VisualTreeHelper.GetParent(obj);
10 
11             while (parent != null)
12             {
13                 if (parent is T)
14                 {
15                     return (T)parent;
16                 }
17                 parent = VisualTreeHelper.GetParent(parent);
18             }
19             return null;
20         }

 1  　　　　/// <summary>
 2         /// 获取指定类型的可视子对象
 3         /// </summary>
 4         /// <typeparam name="T">指定类型</typeparam>
 5         /// <param name="obj">传入的对象</param>
 6         /// <returns></returns>
 7         public static T GetChildObject<T>(DependencyObject obj) where T : FrameworkElement
 8         {
 9             DependencyObject child = null;
10             T grandChild = null;
11 
12             for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
13             {
14                 child = VisualTreeHelper.GetChild(obj, i);
15 
16                 if (child is T)
17                 {
18                     return (T)child;
19                 }
20                 else
21                 {
22                     grandChild = GetChildObject<T>(child);
23                     if (grandChild != null)
24                         return grandChild;
25                 }
26             }
27             return null;
28         }