在没有用户交互的情况下关闭 WPF 对话框

Question

I would like to show dialog during some IO operations and after it, close the dialog with code. Something like:

DialogWindow dialog = new DialogWindow();
dialog.ShowDialog();
.... do some file operation....
dialog.Close();

but dialog won't close. I have to close it by myself. Is here way how to close it with code?

Answer 1

Try to use .Show(), not ShowDialog(). If you use ShowDialog, the new window is modal, so you must close manually the window, before you can reach the line of codice dialog.Close().

Answer 2

You can not use ShowDialog() because it blocks the current thread.

You could disable the owner window while the process is running and then enable it afterwards like this ('this' is the owner window) (you'll have to be carefull with errors and exceptions, of course):

    async private void Button_Click(object sender, RoutedEventArgs e)
{
  Window1 win = new Window1();
  this.IsEnabled = false;
  win.Show();
  await Task.Run(() =>
    {
      Thread.Sleep(2000);
    });

  win.Close();
  this.IsEnabled = true;
}

An alternative is to run the file operation in the opened dialog (opened with ShowDialog() then) instead of in the main window.

Answer 3

If using ShowDialog() then can use below code to close dialog.

(this.Parent as Window).Close();

Answer 4

DialogWindow dialog = new DialogWindow();
Task.Run(()=>
{
    .... do some file operation....
    Dispatcher.BeginInvoke((Action)dialog.Close);
});
dialog.ShowDialog();