解決WPF中button按鈕同時(shí)點(diǎn)擊多次觸發(fā)click的方法，供大家參考，具體內(nèi)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;  }

以上代碼并沒法解決用戶點(diǎn)擊兩次按鈕觸發(fā)兩次的問題,因?yàn)閡i線程是單線程的,所以這個(gè)這樣會(huì)導(dǎo)致用戶連續(xù)點(diǎn)擊兩次,會(huì)兩秒后又調(diào)用Button_Click一次,輸出如下:

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;后面強(qiáng)制界面刷新,代碼如下:

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();這個(gè)方法會(huì)強(qiáng)制界面刷新，問題就解決了。

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