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
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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:
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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脚本之家。