asp.net动态纵向菜单

using System;  
using System.Data;  
using System.Configuration;  
using System.Collections;  
using System.Web;  
using System.Web.Security;  
using System.Web.UI;  
using System.Web.UI.WebControls;  
using System.Web.UI.WebControls.WebParts;  
using System.Web.UI.HtmlControls;  
using Microsoft.Practices.EnterpriseLibrary.Data;  
using Microsoft.Practices.EnterpriseLibrary.Common;  
using System.Data.Common;  
public partial class LeftMenu : System.Web.UI.Page  
{  
    Database db = DatabaseFactory.CreateDatabase("sqlconstr2");  
    protected void Page_Load(object sender, EventArgs e)  
    {  
        if (!Page.IsPostBack)  
            GVDataBind();  
    }  
    private void GVDataBind()  
    {  
        DbCommand dcmd = db.GetSqlStringCommand("select * from dbo.[Group] where UserID=0");  
        DataSet ds = db.ExecuteDataSet(dcmd);  
        this.GridView1.DataSource=ds.Tables[0];  
        this.GridView1.DataBind();  
    }  
    private void DLDataBind(DataList dl, int GID)  
    {  
 
         
        string sql = "SELECT [User].*,[GroupUser].GroupID FROM [GroupUser] INNER JOIN [User] ON [User].ID=[GroupUser].UserID WHERE GroupID=" + GID + "";  
        DbCommand dcmd = db.GetSqlStringCommand(sql);  
        DataSet ds = db.ExecuteDataSet(dcmd);  
        dl.DataSource = ds.Tables[0];  
        dl.DataBind();  
 
    }  
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)  
    {  
        DataList dlUser = (DataList)e.Row.FindControl("DataList1");  
        if (dlUser != null)  
        {   ///绑定数据  
            DLDataBind(dlUser, Int32.Parse(this.GridView1.DataKeys[e.Row.RowIndex].Value.ToString()));&

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