WPF 界面控件遍历和后台行为绑定写法

             InvokeCommandAction ic = new InvokeCommandAction();
             ic.Command = tree.SelectedItemCommand;//绑定的命令
             ic.CommandParameter = treeView;
             System.Windows.Interactivity.EventTrigger et = new System.Windows.Interactivity.EventTrigger();
             et.EventName = "SelectedItemChanged";
             et.Actions.Add(ic);
             System.Windows.Interactivity.TriggerCollection tc = Interaction.GetTriggers(treeView);
             tc.Add(et);

         public static List<T> GetChildObj<T>(DependencyObject obj) where T : FrameworkElement
         {
             List<T> list = new List<T>();
             DependencyObject child = null;
             for (int i = ; i < System.Windows.Media.VisualTreeHelper.GetChildrenCount(obj); i++)
             {
                 child = System.Windows.Media.VisualTreeHelper.GetChild(obj, i);
                 if (child is T)
                 {
                     list.Add((T)child);
                 }
                 //GetChildObj<T>(child);//仅仅遍历只在当前控件内的元素
                 list.AddRange(GetChildObj<T>(child));//遍历当前控件包括所有子控件
             }

             return list;
         }