Solution to trigger click by clicking button button multiple times at the same time in WPF

Solve the button button in WPF to trigger click by clicking it several times at the same time. For your reference, the specific contents are as follows

  DateTime lastClick = DateTime.Now;
  object obj = new object();
  int i = 0;
  private void Button_Click(object sender, RoutedEventArgs e)
  {
   this.IsEnabled = false;  
   var t = (DateTime.Now - lastClick).TotalMilliseconds;
   i++;
   lastClick = DateTime.Now;
   System.Diagnostics.Debug.Print(t + "," + i + ";" + DateTime.Now);
   Thread.Sleep(2000);   
   this.IsEnabled = true;
  }

The above code can't solve the problem that the user clicks the button twice to trigger twice, because the ui thread is single-threaded, so this will cause the user to click twice in succession, and then call Button_Click1 times after two seconds. The output is as follows:

1207.069, 1; April 19, 2017 13:58:22
2055.1176, 2; April 19, 2017 13:58:24

Therefore, this. IsEnabled = false; The interface is forced to refresh later, and the code is as follows:

private void Button_Click(object sender, RoutedEventArgs e)
  {
   this.IsEnabled = false;
   DispatcherHelper.DoEvents();
   var t = (DateTime.Now - lastClick).TotalMilliseconds;
   i++;
   lastClick = DateTime.Now;
   System.Diagnostics.Debug.Print(t + "," + i + ";" + DateTime.Now);
   Thread.Sleep(2000);   
   this.IsEnabled = true;
  }
  public static class DispatcherHelper
  {
   [SecurityPermissionAttribute(SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)]
   public static void DoEvents()
   {
    DispatcherFrame frame = new DispatcherFrame();
    Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, new DispatcherOperationCallback(ExitFrames), frame);
    try { Dispatcher.PushFrame(frame); }
    catch (InvalidOperationException) { }
   }
   private static object ExitFrames(object frame)
   {
    ((DispatcherFrame)frame).Continue = false;
    return null;
   }
  }

DispatcherHelper. DoEvents (); This method will force the interface to refresh, and the problem will be solved.