我的dropdownlist的SelectedIndexChanged事件没有响应，为什么？？哭啊？？？

<asp:DropDownList id="DropDownList1" runat="server" AutoPostBack="True"

解决方案 »

  1.   

    <%@ Page Language="C#" AutoEventWireup="True" %>
    <html>
    <head>
    <script runat="server">
    private void dropdownlist1_SelectedIndexChanged(object sender, System.EventArgs e)
    {Label1.Text="响应阿·！··";
    Response.Write("<script>alert('您响应阿！')</"+"script>");
    }</script>
    </head>
    <body>
    <form runat="server">
    <asp:DropDownList id="dropdownlist1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="dropdownlist1_SelectedIndexChanged">
     <asp:ListItem>Item 1</asp:ListItem>
     <asp:ListItem>Item 2</asp:ListItem>
     <asp:ListItem>Item 3</asp:ListItem>
     <asp:ListItem>Item 4</asp:ListItem>
    </asp:DropDownList>     
    <asp:Label id="Label1" runat="server"/>
    </form>
    </body>
    </html>