public IActionResult Save(EditDiscountViewModel model) { if (!ModelState.IsValid) { return(PartialView("Edit", model)); } var discount = model.Discount; if (model.Discount.UserId == "0") { model.Discount.UserId = null; } if (string.IsNullOrEmpty(model.PersianValidFrom) == false) { discount.ValidFrom = model.PersianValidFrom.PersianDateToEnglishDate(); } if (string.IsNullOrEmpty(model.PersianValidTo) == false) { discount.ValidTo = model.PersianValidTo.PersianDateToEnglishDate(); } if (discount.Id == 0) { discount.Code = _discountService.GenerateRandomCode(); } var savedDiscount = _discountService.AddOrUpdate(discount); return(RedirectToAction("Index")); }