public JsonResult Get(int pageIndex, int pageSize, string pageOrder, string title, string fromDate, string toDate)
        {
            DateTime?sDate = null,
                    eDate  = null;

            if (fromDate != String.Empty)
            {
                sDate = Utilities.ToEnglishDate(fromDate).Date;
            }

            if (toDate != String.Empty)
            {
                eDate = Utilities.ToEnglishDate(toDate).Date;
            }

            var list = ProductDiscounts.Get(pageIndex,
                                            pageSize,
                                            pageOrder,
                                            title,
                                            sDate,
                                            eDate);

            foreach (var item in list)
            {
                if (item.ProductID.HasValue)
                {
                    var product = Products.GetByID(item.ProductID.Value);
                    item.ProductTitle = product.Title;
                }
                else
                {
                    item.ProductTitle = "-";
                }

                if (item.GroupID.HasValue)
                {
                    var group = Groups.GetByID(item.GroupID.Value);
                    item.GroupTitle = group.Title;
                }
                else
                {
                    item.GroupTitle = "-";
                }

                if (item.RoleID != null)
                {
                    var role = IdentityDbContext.Entity.Roles.Where(r => r.Id == item.RoleID).Single();
                    item.RoleTitle = role.Name;
                }
                else
                {
                    item.RoleTitle = "-";
                }
            }

            int total     = ProductDiscounts.Count(title, sDate, eDate);
            int totalPage = (int)Math.Ceiling((decimal)total / pageSize);

            if (pageSize > total)
            {
                pageSize = total;
            }

            if (list.Count < pageSize)
            {
                pageSize = list.Count;
            }

            JsonResult result = new JsonResult()
            {
                Data = new
                {
                    TotalPages = totalPage,
                    PageIndex  = pageIndex,
                    PageSize   = pageSize,
                    Rows       = list
                },
                JsonRequestBehavior = JsonRequestBehavior.AllowGet
            };

            return(result);
        }