public ActionResult DeleteCategory(int id) { CategoryDataStore Obj = new CategoryDataStore(); // check if this category is in product ProductDataStore ObjProd = new ProductDataStore(); if (ObjProd.CheckCategory(id)) { TempData["ErrorMessage"] = "You can not delete this category, please delete related product first."; return(RedirectToAction("Category")); } else { if (Obj.DeleteCategory(id) == true) { //return View("Category"); return(RedirectToAction("Category")); } else { return(View("ErrorEventArgs")); } } }