WPF中button按钮同时点击多次触发click解决方法_ASP.NET教程

WPF中button按钮同时点击多次触发click解决方法

2020-05-01 14:47liningit ASP.NET教程

这篇文章主要为大家详细介绍了WPF中button按钮同时点击多次触发click的解决方法，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

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;

									   }

									  }