public async Task <ActionResult> CustomerChoice(string BrandName) { if (BrandName == "") { return(RedirectToAction("CustomerChoice")); } else { List <BikeModel> bikeModels = new List <BikeModel>(); bikeModels = await _modelManager.CustomerChoice(BrandName); if (bikeModels == null) { return(View("null")); } else { return(View(bikeModels)); } } }