WPF中button按钮同时点击多次触发click解决方法

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