public ActionResult Input(Category model) { try { //TODO: kiem tra tinh hop le cua du lieu if (string.IsNullOrEmpty(model.CategoryName)) { ModelState.AddModelError("CategoryName", "CategoryName expected"); } if (string.IsNullOrEmpty(model.Description)) { model.Description = ""; } if (!ModelState.IsValid) { ViewBag.Title = model.CategoryID == 0 ? "Create new Category" : "Edit a Category"; return(View(model)); } //TODO: Luu if (model.CategoryID == 0) { CataLogBLL.AddCategory(model); } else { CataLogBLL.UpdateCategory(model); } return(RedirectToAction("Index")); } catch (Exception ex) { ModelState.AddModelError("Loi", ex.StackTrace); return(View(model)); } }