＝＝＝＝＝＝＝＝＝＝＝请问得到传的值后，怎么根据这个值显示＝＝＝＝＝＝＝＝＝＝

public partial class payload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string cid;
        cid = Request.QueryString["cid"].ToString();
    }
}
请问得到传的值后，怎么根据这个值显示内容啊??????????我用的GridView .<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
            DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None">
            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <Columns>
                <asp:BoundField DataField="data_payload" HeaderText="data_payload" SortExpression="data_payload" />
            </Columns>
            <RowStyle BackColor="#EFF3FB" />
            <EditRowStyle BackColor="#2461BF" />
            <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
            <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
            <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <AlternatingRowStyle BackColor="White" />
        </asp:GridView>
        
                <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:snortConnectionString %>"
            SelectCommand="SELECT data_payload FROM data WHERE (cid = cid)">   ■■■■■■　　这里不知道为什么得不到值　　■■■■■■■
     </asp:SqlDataSource>
    </div>
    </form>
</body>
</html>

解决方案 »

  1.   

    SelectCommand="SELECT data_payload FROM data WHERE (cid = <%= Request.QueryString["cid"].ToString()%> )">
      

  2.   

    为什么加了这句有语法错误了??  <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:snortConnectionString %>"
                SelectCommand="SELECT data_payload FROM data WHERE (cid = <%= Request.QueryString["cid"].ToString()%> )"> 
         </asp:SqlDataSource>
      

  3.   

    说这个地方不能用服务器脚本 <% %>,
    怎么改啊?