[ASP.NET]ASP.NET数据绑定菜单控件

public void BindMenu(Menu mn,MenuItem menu,string mainMenu,string sql)
        {
                MenuItem mitem = null;
                DB db = new DB();
                DataSet ds = db.GetDataSet(sql, "table1");
                DataTable dTable = ds.Tables[];
                DataRow[] drow = dTable.Select(" parentId='" + mainMenu + "'");   

                foreach (DataRow dr in drow)
                {
                        mitem = new MenuItem();
                        mitem.Text = dr["modulName"].ToString();
                        mitem.Value = dr["modulId"].ToString();
                        mitem.NavigateUrl = "Default.aspx";
                        if (menu == null)
                        {
                                mn.Items.Add(mitem);
                        }
                        else
                        {
                                menu.ChildItems.Add(mitem);
                        }
                        DataSet dst = db.GetDataSet(sql, "table2");
                        DataTable dtb = dst.Tables[];
                        DataRow[] dar = dtb.Select(" parentId='" + mitem.Value + "'");
                        mainMenu = mitem.Value;
                        BindMenu(Menu1, mitem, mainMenu, sql);
                }
        }