public ComBillDTO GetPageData()
        {
            ComBillDTO comBill = new ComBillDTO();

            if (User.IsInRole("Admin"))
            {
                var prodList = from productlist in db.ProductMsts
                               select new ProductDDD_DTO
                {
                    ProductId   = productlist.pk_ProductId,
                    ProductName = productlist.ProductName
                };


                comBill.ProductList = prodList.ToList();
            }

            return(comBill);
        }
        public ActionResult SaveUpdateBill(int id)
        {
            ComBillDTO items = new ComBillDTO();

            CustomerMst cust;

            if (User.IsInRole("Admin"))
            {
                cust = db.CustomerMsts.FirstOrDefault(s => s.pk_Cusid == id);
            }

            else
            {
                cust = db.CustomerMsts.FirstOrDefault(s => s.pk_Cusid == id && s.UserName == User.Identity.Name);
            }


            items             = GetPageData();
            items.CustomerMst = cust;
            return(View(items));
        }