public ActionResult Edit(int?Id) { if (Id == null) { return(RedirectToAction("List", "SpecificationAttribute")); } SpecificationAttributeViewModel model = new SpecificationAttributeViewModel(); var _spec = _specificationService.GetById(Id ?? 0); if (_spec != null) { model.Id = _spec.Id; model.Name = _spec.Name; model.OrderNo = _spec.OrderNo; } return(View(model)); }