public IActionResult ListCandiesBySeller(string sellerName) { var sellerCandyListViewModel = new SellerCandyListViewModel(); if (string.IsNullOrEmpty(sellerName)) { sellerCandyListViewModel.Candies = _candyRepository.GetAllCandy; sellerCandyListViewModel.CurrentSeller = "All candies"; } else { sellerCandyListViewModel.Candies = _candyRepository.GetCandiesBySeller(sellerName).ToList(); sellerCandyListViewModel.CurrentSeller = _sellerRepository.GetSellerByName(sellerName)?.SellerName; } return(View(sellerCandyListViewModel)); }