WPF查找子控件和父控件方法[转帖]

WPF查找子控件和父控件方法

一、查找某种类型的子控件，并返回一个List集合
public List<T> GetChildObjects<T>(DependencyObject obj, Type typename) where T : FrameworkElement
        {
            DependencyObject child = null; List<T> childList = new List<T>(); for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++) { child = VisualTreeHelper.GetChild(obj, i); if (child is T && (((T)child).GetType() == typename)) { childList.Add((T)child); } childList.AddRange(GetChildObjects<T>(child,typename)); } return childList; } 调用： List<Button> listButtons = GetChildObjects<Button>(parentPanel, typeof(Button)); 二、通过名称查找子控件，并返回一个List集合 public List<T> GetChildObjects<T>(DependencyObject obj, string name) where T : FrameworkElement { DependencyObject child = null; List<T> childList = new List<T>(); for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++) { child = VisualTreeHelper.GetChild(obj, i); if (child is T && (((T)child).GetType() == name |string.IsNullOrEmpty(name))) { childList.Add((T)child); } childList.AddRange(GetChildObjects<T>(child,name)); } return childList; } 调用： List<Button> listButtons = GetChildObjects<Button>(parentPanel, "button1"); 三、通过名称查找某子控件： public T GetChildObject<T>(DependencyObject obj, string name) where T : FrameworkElement { DependencyObject child = null; T grandChild = null; for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++) { child = VisualTreeHelper.GetChild(obj, i); if (child is T && (((T)child).Name == name | string.IsNullOrEmpty(name))) { return (T)child; } else { grandChild = GetChildObject<T>(child, name); if (grandChild != null) return grandChild; } } returnnull; } 调用： StackPanel sp = GetChildObject<StackPanel>(this.LayoutRoot, "spDemoPanel"); 四、通过名称查找父控件 public T GetParentObject<T>(DependencyObject obj, string name) where T : FrameworkElement { DependencyObject parent = VisualTreeHelper.GetParent(obj); while (parent != null) { if (parent is T && (((T)parent).Name == name | string.IsNullOrEmpty(name))) { return (T)parent; } parent = VisualTreeHelper.GetParent(parent); } returnnull; } 调用： Grid layoutGrid = VTHelper.GetParentObject<Grid>(this.spDemoPanel, "LayoutRoot"); 

转载于:https://www.cnblogs.com/Luffyhuang/p/4450277.html