public ActionResult ComboMaintain()
        {
            var sysNo = Request.QueryString["sysNo"];
            int id;
            ComboQueryResult data = null;

            if (sysNo != null && int.TryParse(sysNo, out id))
            {
                data = _comboService.Load(id);
            }
            ViewBag.Data = new JavaScriptSerializer().Serialize(data);
            return(View());
        }