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。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。