c# – WPF更改窗口模态状态

这种方法的缺点是对话框会闪烁.

private Window1 myWindow = new Window1();

private void MyButton_Click(object sender,RoutedEventArgs e)
{
    // Using a timer to simulate something happening 5 seconds later that would cause dialog state to change
    DispatcherTimer dispatcherTimer = new DispatcherTimer();
    dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
    dispatcherTimer.Interval = new TimeSpan(0,5);
    dispatcherTimer.Start();
    // The following line will block until you switch the dialog from modal to non-modal
    myWindow.ShowDialog();            
}

private void dispatcherTimer_Tick(object sender,EventArgs e)
{
    (sender as DispatcherTimer).Stop();
    myWindow.Hide();
    myWindow.Show();
}

如果你想要从窗口本身将窗口切换到非模态,那么调用Hide()后跟Show()将完成同样的事情(再次使用闪烁)

private void SwitchToModelessButton_Click(object sender,RoutedEventArgs e)
{
    this.Hide();
    this.Show();
}

值得注意的是,当您进行此切换时,将对ShowDialog()的“主”窗口调用返回.