【转载】wpf 查找指定类型的子控件

http://blog.csdn.net/fallincloud/article/details/6960255#

查找指定类型的子控件


[csharp] view plaincopyprint?
  1. /// <summary> 
  2. /// Find Child with Visual Tree 
  3. /// </summary> 
  4. /// <typeparam name="T">specail type</typeparam> 
  5. /// <param name="root">the element starts</param> 
  6. /// <returns></returns> 
  7. public static T FindChild<T>(DependencyObject root) where T : DependencyObject 
  8. { 
  9.     if (root == null) 
  10.         return null; 
  11.  
  12.     T founded = null; 
  13.  
  14.     for (int j = 0; j < VisualTreeHelper.GetChildrenCount(root); j++) 
  15.     { 
  16.         DependencyObject d = VisualTreeHelper.GetChild(root, j); 
  17.         T childType = d as T; 
  18.         if (childType == null) 
  19.         { 
  20.             founded = FindChild<T>(d); 
  21.             if (founded != null) 
  22.                 break; 
  23.         } 
  24.         else 
  25.         { 
  26.             founded = childType; 
  27.             break; 
  28.         } 
  29.     } 
  30.  
  31.     return founded; 
  32. } 

查找指定类型指定名称的子控件：

[csharp] view plaincopyprint?
  1. /// <summary> 
  2. /// Find Child with Visual Tree 
  3. /// </summary> 
  4. /// <typeparam name="T">specail type</typeparam> 
  5. /// <param name="root">the element starts</param> 
  6. /// <returns></returns> 
  7. public static T FindChild<T>(DependencyObject root, string name) where T : DependencyObject 
  8. { 
  9.     if (root == null) 
  10.         return null; 
  11.  
  12.     T founded = null; 
  13.  
  14.     for (int j = 0; j < VisualTreeHelper.GetChildrenCount(root); j++) 
  15.     { 
  16.         DependencyObject d = VisualTreeHelper.GetChild(root, j); 
  17.         T childType = d as T; 
  18.         if (childType == null || ((d is FrameworkElement) && (d as FrameworkElement).Name != name)) 
  19.         { 
  20.             founded = FindChild<T>(d, name); 
  21.             if (founded != null) 
  22.                 break; 
  23.         } 
  24.         else 
  25.         { 
  26.             founded = childType; 
  27.             break; 
  28.         } 
  29.     } 
  30.  
  31.     return founded; 
  32. } 


查找父控件：

[csharp] view plaincopyprint?
  1. public static T FindParent<T>(DependencyObject d) where T : DependencyObject 
  2. { 
  3.     DependencyObject parent = d; 
  4.     while (parent != null) 
  5.     { 
  6.         parent = VisualTreeHelper.GetParent(parent); 
  7.         if (parent != null && (parent.GetType() == typeof(T))) 
  8.         { 
  9.             return parent as T; 
  10.         } 
  11.     } 
  12.     return parent as T; 
  13. } 
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原文地址：https://www.cnblogs.com/fx2008/p/2755125.html