ASP.net SQLHelper 应用

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AdminLeft.aspx.cs" Inherits="Left" %><%@ Register Assembly="dmenu" Namespace="dmenu" TagPrefix="cc1" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
     <style type="text/css">
TD { FONT-SIZE: 9pt }
BODY { SCROLLBAR-FACE-COLOR: #5C8CB7; SCROLLBAR-HIGHLIGHT-COLOR: #ffffff; SCROLLBAR-SHADOW-COLOR: #ffffff; SCROLLBAR-3DLIGHT-COLOR: #B5CDE1; LINE-HEIGHT: 100%; SCROLLBAR-ARROW-COLOR: #BED1E2; SCROLLBAR-TRACK-COLOR: #F1F8FE; SCROLLBAR-DARKSHADOW-COLOR: #B5CDE1 }
a.left{font-size:12px;text-decoration:none; letter-spacing: 1px;}
a.left:link{color:#014575;}
a.left:visited{color:#014575;}
a.left:hover{color:blue;}
</style>
</head>
<body background="../images/left_bg.gif">
    <form id="form1" runat="server">
    <div>
        <cc1:Dmenu ID="Dmenu1" runat="server" Sty_CloseImg="" Sty_OpenImg="" />
        &nbsp;</div>
    </form>
</body>
</html>
public partial class Left : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        SQLHelper sqlhelper = new SQLHelper();
        DataSet dt = new DataSet();
        sqlhelper.RunSQL("select * from Adminmenu order by menu_id asc", ref dt);
        //在此处放置用户代码以初始化页面        Dmenu1.Sty_UrlTarget = "mainFrame";        Dmenu1.DataTableSource = dt.Tables[0];
        Dmenu1.Sty_TrStyle = "bgcolor=#FFFBF1";
        Dmenu1.Sty_Link = "class=left";
        Dmenu1.DataBind();
    }
}不知道为什么 子菜单读取不出来   求解答