wpf获取父控件、子控件

1、获取父控件

调用方法：Grid layoutGrid = VTHelper.GetParentObject<Grid>(this.spDemoPanel, "LayoutRoot");

public T GetParentObject<T>(DependencyObject obj, string name) where T : FrameworkElement
 2 {
    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);
    }
    return null;
}

2、获取子控件

调用方法：StackPanel sp = VTHelper.GetChildObject<StackPanel>(this.LayoutRoot, "spDemoPanel");

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;
                 }
             }
             return null;
         }

3、获取所有子控件

调用方法：List<TextBlock> textblock = VTHelper.GetChildObjects<TextBlock>(this.LayoutRoot, "");

在表格中的控件：List<TextBox> listTextBox = GetChildObjects<TextBox>(radGridView_File.ItemContainerGenerator.ContainerFromItem(radGridView_File.SelectedItems[0]), "");

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).Name == name || string.IsNullOrEmpty(name)))
                 {
                     childList.Add((T)child);
                 }
                childList.AddRange(GetChildObjects<T>(child,""));
              }
             return childList;
         }