private async Task Redirect(string type) { var param = new NavigationParameters(); var key = "productType"; if (type == "beras") { param.Add(key, AllProducts.ElementAt(0)); } else if (type == "durian") { param.Add(key, AllProducts.ElementAt(1)); } else if (type == "kakao") { param.Add(key, AllProducts.ElementAt(2)); } else { param.Add(key, AllProducts.ElementAt(3)); } await _navigationService.NavigateAsync("ProdukDetailPage", param); }