WPF弹出窗口意外地从UI中消失

Question

我的wpf应用程序中有一个模态弹出窗口。显示该窗口后，在某些（罕见）情况下，窗口从UI中消失。但我们可以发现使用“alt + tab”并且无法激活它。

请在下面找到我使用的代码，

       //WindowInteropHelper assists interoperation between Windows Presentation Foundation (WPF) and Win32 code.

        private void OnControlClick(object sender, RoutedEventArgs e)
        {
        System.Drawing.Point p = System.Windows.Forms.Control.MousePosition;
        MyPopup popup = new MyPopup();

        _windowInteropHelper = new System.Windows.Interop.WindowInteropHelper(popup);
        _windowInteropHelper.Owner = this._owner;
        popup.WindowStartupLocation = System.Windows.WindowStartupLocation.Manual;
        popup.Left = p.X;
        popup.Top = p.Y;

        popup.Closing += new System.ComponentModel.CancelEventHandler(OnPopupClosing);
        popup.ShowDialog();
        }

Answer 1

尝试使用IsOpen属性来显示/隐藏弹出窗口。