public JsonResult BindSupplier(string prefix)
        {
            DataSet         ds         = objbl.BindSupplier(prefix);
            List <Purchase> searchList = new List <Purchase>();

            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                searchList.Add(new Purchase
                {
                    ProductSupplierID   = dr["ProductSupplierID"].ToString(),
                    ProductSupplierName = dr["ProductSupplierName"].ToString(),
                });
            }
            return(new JsonResult {
                Data = searchList, JsonRequestBehavior = JsonRequestBehavior.AllowGet
            });
        }