1 /// <summary>
2 /// 用于查找控件的工具类：找到父控件、子控件
3 /// </summary>
4 class ControlsSearchHelper
5 {
6 /// <summary>
7 /// 查找父控件
8 /// </summary>
9 /// <typeparam name="T">父控件的类型</typeparam>
10 /// <param name="obj">要找的是obj的父控件</param>
11 /// <param name="name">想找的父控件的Name属性</param>
12 /// <returns>目标父控件</returns>
13 public static T GetParentObject<T>(DependencyObject obj, string name) where T : FrameworkElement
14 {
15 DependencyObject parent = VisualTreeHelper.GetParent(obj);
16
17 while (parent != null)
18 {
19 if (parent is T && (((T)parent).Name == name | string.IsNullOrEmpty(name)))
20 {
21 return (T)parent;
22 }
23
24 // 在上一级父控件中没有找到指定名字的控件，就再往上一级找
25 parent = VisualTreeHelper.GetParent(parent);
26 }
27
28 return null;
29 }
30
31
32 /// <summary>
33 /// 查找子控件
34 /// </summary>
35 /// <typeparam name="T">子控件的类型</typeparam>
36 /// <param name="obj">要找的是obj的子控件</param>
37 /// <param name="name">想找的子控件的Name属性</param>
38 /// <returns>目标子控件</returns>
39 public static T GetChildObject<T>(DependencyObject obj, string name) where T : FrameworkElement
40 {
41 DependencyObject child = null;
42 T grandChild = null;
43
44 for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
45 {
46 child = VisualTreeHelper.GetChild(obj, i);
47
48 if (child is T && (((T)child).Name == name | string.IsNullOrEmpty(name)))
49 {
50 return (T)child;
51 }
52 else
53 {
54 // 在下一级中没有找到指定名字的子控件，就再往下一级找
55 grandChild = GetChildObject<T>(child, name);
56 if (grandChild != null)
57 return grandChild;
58 }
59 }
60
61 return null;
62
63 }
64
65
66 /// <summary>
67 /// 获取所有同一类型的子控件
68 /// </summary>
69 /// <typeparam name="T">子控件的类型</typeparam>
70 /// <param name="obj">要找的是obj的子控件集合</param>
71 /// <param name="name">想找的子控件的Name属性</param>
72 /// <returns>子控件集合</returns>
73 public static List<T> GetChildObjects<T>(DependencyObject obj, string name) where T : FrameworkElement
74 {
75 DependencyObject child = null;
76 List<T> childList = new List<T>();
77
78 for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
79 {
80 child = VisualTreeHelper.GetChild(obj, i);
81
82 if (child is T && (((T)child).Name == name || string.IsNullOrEmpty(name)))
83 {
84 childList.Add((T)child);
85 }
86
87 childList.AddRange(GetChildObjects<T>(child, ""));
88 }
89
90 return childList;
91
92 }
93 }
94 }
95
96 public static IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
97 {
98 if (depObj != null)
99 {
100 for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
101 {
102 DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
103
104 if (child != null && child is T)
105 yield return (T)child;
106
107 foreach (T childOfChild in FindVisualChildren<T>(child))
108 yield return childOfChild;
109 }
110 }
111 }
