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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