c# - WPF 改变窗口模式状态

Question

是否可以在 WPF 中将窗口从模态更改为非模态？这意味着，我用 ...ShowDialog(); 打开窗口，但稍后想切换状态(比如打开窗口 ...Show();。

Answer 1

假设您想将窗口从“主”窗口切换为非模态窗口，您可以执行类似这样的操作，Window1 在 5 秒后变为非模态窗口。

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, 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();
}

如果您想从窗口本身将窗口切换为非模态窗口，那么调用 Hide() 和 Show() 将完成同样的事情(再次闪烁)

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，对 ShowDialog() 的“主”窗口调用将返回。