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 = 0; 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;
        }