WPF中button按钮同时点击多次触发click解决方法

解决WPF中button按钮同时点击多次触发click的方法，供大家参考，具体内容如下

  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;  }

以上代码并没法解决用户点击两次按钮触发两次的问题,因为ui线程是单线程的,所以这个这样会导致用户连续点击两次,会两秒后又调用Button_Click一次,输出如下:

1207.069,1;2017年4月19日 13:58:22
2055.1176,2;2017年4月19日 13:58:24

所以要在this.IsEnabled = false;后面强制界面刷新,代码如下:

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();这个方法会强制界面刷新，问题就解决了。

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