如何正确理解ASP.NET中的Sender?

如何正确理解ASP.NET中的Sender?

举个例子:

<input type="submit" id="a1" value="闪" OnServerClick="Submit_Click" runat="server">

<input type="submit" id="a2" value="亮" OnServerClick="Submit_Click" runat="server">

<input type="submit" id="a3" value="日" OnServerClick="Submit_Click" runat="server">

<input type="submit" id="a4" value="子" OnServerClick="Submit_Click" runat="server">

这是四个Submit 按钮,我们知道它触发的事件是同一个事件,但要怎么来区分呢?看看下面就知道了:

public void Submit_Click(Object sender, EventArgs E)

{

switch (((Control)sender).ID)

{

case "a1" :showmsg.Text=""宋颜浩; break;

case "a2" :showmsg.Text=""李雁冰; break;

case "a3" :showmsg.Text=""费文华; break;

case "a4" :showmsg.Text=""吴晓桃; break;

}

}

</script>

<asp:Label id=showmsg runat=server />

posted @ 2007-03-09 16:38  chinaifne  阅读(690)  评论(0编辑  收藏  举报