摘要： private DateTime lastClickTimeTabItem;private Point lastPointionTabItem; //Point为结构体，无须实例化private void lblItem_MouseLeftButtonDown(object sender,MouseButtonEventArgs e){//判断是否构成双击 DateTime utcNow = DateTime.UtcNow;Point position = e.GetPosition((UIElement)sender);TimeSpan span = (TimeSpan)(utcNow -. 阅读全文