第一形式负载线（或构造）例如GotFocus事件codeprelang="cs"dateTimePicker1.GotFocus+=spanclass="code-keyword"new/spanEventHandler(dateTimePicker1_GotFocus);/pre/code并在处理程序codeprelang="cs"spanclass="code-keyword"void/spandateTimePicker1_GotFocus(spanclass="code-keyword"object/spansender,EventArgse){System.Windows.Forms.SendKeys.Send(spanclass="code-string""/spanspanclass="code-string"%{DOWN}"/span);}/pre/code 乌代・辛格:是的，很可能使用AJAX Control Toolkit中。实施参考这篇文章: