//设置键
        private void Preference_Click(object sender, RoutedEventArgs e)
        {
            var       w  = (MainWindow)Window.GetWindow(this);
            SubWindow sw = new SubWindow(w);

            sw.ChangArgEvent += new SubWindow.ChangArgs(ChangeArgs);
            sw.Show();
            return;
        }
 //设置键
 private void Preference_Click(object sender, RoutedEventArgs e)
 {
     var w = (MainWindow)Window.GetWindow(this);
     SubWindow sw = new SubWindow(w);
     sw.ChangArgEvent += new SubWindow.ChangArgs(ChangeArgs);
     sw.Show();
     return;
 }