Button.Attributes.Add 的问题
<html>
<body>
<form runat="server">
<asp:Label id="lbl" text="111" Runat="server" /><br>
<asp:Button text="too" id="btn1" RunAt="server" />
</form>
</body>
</html>
<script language="C#" runat="server">
void Page_Load(object sender, EventArgs e)
{
btn1.Attributes.Add("onclick","this.lbl.Visible=false");
}
</script>
执行这段代码之后并没有将lbl的状态改变,请问是为什么?