【转载】wpf 查找指定类型的子控件

http://blog.youkuaiyun.com/fallincloud/article/details/6960255#

查找指定类型的子控件

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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. } 

		/// <summary>
		/// Find Child with Visual Tree
		/// </summary>
		/// <typeparam name="T">specail type</typeparam>
		/// <param name="root">the element starts</param>
		/// <returns></returns>
		public static T FindChild<T>(DependencyObject root) where T : DependencyObject
		{
			if (root == null)
				return null;

			T founded = null;

			for (int j = 0; j < VisualTreeHelper.GetChildrenCount(root); j++)
			{
				DependencyObject d = VisualTreeHelper.GetChild(root, j);
				T childType = d as T;
				if (childType == null)
				{
					founded = FindChild<T>(d);
					if (founded != null)
						break;
				}
				else
				{
					founded = childType;
					break;
				}
			}

			return founded;
		}

 

查找指定类型指定名称的子控件：

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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. } 

		/// <summary>
		/// Find Child with Visual Tree
		/// </summary>
		/// <typeparam name="T">specail type</typeparam>
		/// <param name="root">the element starts</param>
		/// <returns></returns>
		public static T FindChild<T>(DependencyObject root, string name) where T : DependencyObject
		{
			if (root == null)
				return null;

			T founded = null;

			for (int j = 0; j < VisualTreeHelper.GetChildrenCount(root); j++)
			{
				DependencyObject d = VisualTreeHelper.GetChild(root, j);
				T childType = d as T;
				if (childType == null || ((d is FrameworkElement) && (d as FrameworkElement).Name != name))
				{
					founded = FindChild<T>(d, name);
					if (founded != null)
						break;
				}
				else
				{
					founded = childType;
					break;
				}
			}

			return founded;
		}

 

查找父控件：

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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. }