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WPF不借助Window.ShowDialog如何实现ShowDialog的效果 RRS feed

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    你好 yemx21,

    我找到了一个方法能让你只调用Show方法就能够打开一个模态窗体， 在你的父窗体中首先要通过 API  EnableWindow 函数来使父窗体Disable， 然后show子窗体，在子窗体中通过调用API

                EnableWindow(handle, true);
                SetForegroundWindow(handle);

    来使得子窗体成为模态，最后在子窗体关闭的时候别忘了取消这些设置：

    MainWindow.cs:

      public partial class MainWindow : Window
  {
    [DllImport("user32.dll", SetLastError = true)]
    static extern int GetWindowLong(IntPtr hwnd, int index);

    [DllImport("user32.dll")]
    static extern bool EnableWindow(IntPtr hWnd, bool bEnable);

    public MainWindow()
    {
      InitializeComponent();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
      IntPtr handle = (new System.Windows.Interop.WindowInteropHelper(this)).Handle;
      Window1 dialog = new Window1();
      dialog.Owner = this;
      WindowInteropHelper helper = new WindowInteropHelper(dialog);
      EnableWindow(handle, false);
      dialog.Show();
    }
  }

     

    Window1.cs:

      public partial class Window1 : Window
  {
    [DllImport("user32.dll")]
    static extern bool EnableWindow(IntPtr hWnd, bool bEnable);

    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool SetForegroundWindow(IntPtr hWnd);

    public Window1()
    {
      InitializeComponent();
      IntPtr handle = (new System.Windows.Interop.WindowInteropHelper(this)).Handle;
      EnableWindow(handle, true);
      SetForegroundWindow(handle);
      this.Closing += new System.ComponentModel.CancelEventHandler(Window1_Closing);
    }

    void Window1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
    {
      this.Closing -= new System.ComponentModel.CancelEventHandler(Window1_Closing);
      IntPtr handle = (new System.Windows.Interop.WindowInteropHelper(this)).Handle;
      IntPtr ownerhandle = (new System.Windows.Interop.WindowInteropHelper(this.Owner)).Handle;
      EnableWindow(handle, false);
      EnableWindow(ownerhandle, true);
    }
  }

    这里可以下载实例：http://cid-51b2fdd068799d15.office.live.com/self.aspx/.Public/Samples%5E_2010/20101223%5E_ShowAModalWindow.zip

    Sincerely,

    Bob Bao [MSFT]
    MSDN Community Support | Feedback to us
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    2010年12月23日 12:52
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