Invoke的方法不执行

[cwf673452719]

private void timer_method()
        
        {
            if (_ckbtextstatus == true)
            {

                //查找窗口并置顶
                setTopChildWin();
               
                if (_settop == false)
                {
                    this.Dispatcher.Invoke(new delegate_messagetip(messagetip));
                }
            }
        }

/// <summary>
        /// 窗口置顶
        /// </summary>
        /// <returns></returns>
        private void setTopChildWin()
        {
            IntPtr ChildWin = FindWindow(null, "MessageTip");    // 窗口类型WpfApplication1 窗口主题Tip
            IntPtr ChildWin1 = FindWindow("TimeTipAPP", null);
            IntPtr ChildWin2 = FindWindow("APPMessage", null);
            int childwin = (int)ChildWin;
            if (childwin != 0 && _messagewin!=null)
            {

                //SetWindowPos(ChildWin, MainWindow.HWND_TOPMOST, 0, 0, 0, 0, MainWindow.SWP_NOMOVE | MainWindow.SWP_NOSIZE);
                _messagewin.Dispatcher.Invoke( new delegate_setTop(setTopDelegate));
                _settop = true;
                return ;
                
            }
            _settop = false;
            return ;
        }
 private delegate void delegate_setTop();
        private void setTopDelegate()
        {
            _messagewin.Topmost = true;
        }

/// <summary>
        /// 提醒弹窗委托
        /// </summary>
        /// <returns></returns>
        private delegate void delegate_messagetip();
        private void messagetip()
        {
            _parentWin = Window.GetWindow(this);

            _messagewin = new APPMessage(_textmessage);
            _messagewin.Owner = _parentWin;
            hide();
            _messagewin.Show();
            setTopChildWin();
               
        }

定时器定时执行timer_method
置顶的APPMessage窗口移动并关闭后，程序执行到 this.Dispatcher.Invoke(new delegate_messagetip(messagetip));
APPMessage窗口属性：Title="MessageTip" Height="100" Width="200" WindowStartupLocation="Manual" WindowStyle="None" AllowsTransparency="True" Background="#3397BBFB" MouseMove="Move_MouseMove" MouseDoubleClick="Window_MouseDoubleClick"

[exception92]

是执行不到 if 里 还是 执行不到 messagetip 里？

[cwf673452719]

引用 1 楼 duanzi_peng 的回复:

是执行不到 if 里 还是 执行不到 messagetip 里？

是 执行不到 messagetip 里 。 输出窗口： 逐步執行: 不進入非使用者程式碼 'System.Windows.Threading.DispatcherObject.Dispatcher.get'

[xdashewan]

断点调试，查看哪个条件不符合