public JsonResult IsCategoryNameExist(string categoryName) { POSManagementSystemBdContext dbpri = new POSManagementSystemBdContext(); Category cat = dbpri.Categories.Find(categoryName); if (cat == null) { return(Json(true, JsonRequestBehavior.AllowGet)); } return(Json("Category Already Exist, Try Another", JsonRequestBehavior.AllowGet)); }