Error executing template "Designs/Swift/Paragraph/Custom_MixMatchSlider.cshtml"
System.NullReferenceException: Object reference not set to an instance of an object.
   at CustomServices.Services.DiscountService.ReturnMixMatchDiscountProducts(String discountId, String productId, String variantId, String languageId)
   at CustomServices.Services.DiscountService.ReturnDiscountsMixAndMatch(String productId, String varientId)
   at CompiledRazorTemplates.Dynamic.RazorEngine_ec12219b5e7f4d38929fbd24c1173c36.ExecuteAsync()
   at RazorEngine.Templating.TemplateBase.Run(ExecuteContext context, TextWriter reader)
   at RazorEngine.Templating.RazorEngineCore.RunTemplate(ICompiledTemplate template, TextWriter writer, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineService.Run(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.DynamicWrapperService.Run(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.Run(IRazorEngineService service, String name, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass23_0.<Run>b__0(TextWriter writer)
   at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
   at RazorEngine.Templating.RazorEngineServiceExtensions.Run(IRazorEngineService service, String name, Type modelType, Object model, DynamicViewBag viewBag)
   at Dynamicweb.Rendering.RazorTemplateRenderingProvider.Render(Template template)
   at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template)
   at Dynamicweb.Rendering.Template.RenderRazorTemplate()


  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.ParagraphViewModel>
  2     @using Dynamicweb.Ecommerce.ProductCatalog
  3     @using Dynamicweb.Ecommerce.International
  4     @using CustomServices.Services
  5     @using CustomServices.Models
  6     @using Newtonsoft.Json
  7     @{
  8         ProductViewModel product = null;
  9         if (Dynamicweb.Context.Current.Items.Contains("ProductDetails"))
 10         {
 11             product = (ProductViewModel)Dynamicweb.Context.Current.Items["ProductDetails"];
 12         }
 13         else if (Pageview.Page.Item["DummyProduct"] != null && Pageview.IsVisualEditorMode)
 14         {
 15             var pageViewModel = Dynamicweb.Frontend.ContentViewModelFactory.CreatePageInfoViewModel(Pageview.Page);
 16             ProductListViewModel productList = pageViewModel.Item.GetValue("DummyProduct") != null ? pageViewModel.Item.GetValue("DummyProduct") as ProductListViewModel : new ProductListViewModel();
 17     
 18             if (productList?.Products is object)
 19             {
 20                 product = productList.Products[0];
 21             }
 22         }
 23         ProductViewModelSettings productSetting = new ProductViewModelSettings
 24                 {
 25                     LanguageId = Dynamicweb.Ecommerce.Common.Context.LanguageID,
 26                     CurrencyCode = Dynamicweb.Ecommerce.Common.Context.Currency.Code,
 27                     CountryCode = Dynamicweb.Ecommerce.Common.Context.Country.Code2,
 28                     ShopId = Pageview.Area.EcomShopId
 29                 };
 30         int itemCount = Model.Item.GetInt32("Product_Count");
 31     }
 32     
 33     @if (product is object)
 34     {
 35         DiscountService discountService = new DiscountService();
 36         List<MixAndMatchProductInfo> mixAndMatchProductInfos = new List<MixAndMatchProductInfo>();
 37         mixAndMatchProductInfos = discountService.ReturnDiscountsMixAndMatch(product.Id, product.VariantId);
 38         string title = "";
 39         if (mixAndMatchProductInfos.Count > 0)
 40         {
 41             title = mixAndMatchProductInfos[0].discountName;
 42         }
 43     
 44         string detailPageId = GetPageIdByNavigationTag("ProductDetailPage") != 0 ? GetPageIdByNavigationTag("ProductDetailPage").ToString() : "";
 45         string productDetailUrl = "/Default.aspx?ID=" + detailPageId;
 46         @if (mixAndMatchProductInfos.Count > 0)
 47         {
 48             <div class="detail-discount__products">
 49                 <div class="detail-discounts">
 50                     <h3 class="detail-discounttitle">@title</h3>
 51                     <div id="slider_@(Model.ID)" class="swiffy-slider slider-item-show@(itemCount) slider-nav-chevron-default  slider-nav-on-slides slider-nav-visible  slider-indicators-dash">
 52                         <ul class="slider-container">
 53                             @foreach (var mixAndMatchProductInfo in mixAndMatchProductInfos)
 54                             {
 55                                 ProductViewModel productModel = new ProductViewModel();
 56                                 productModel = ViewModelFactory.CreateView(productSetting, mixAndMatchProductInfo.productId);
 57                                 string productDetailPage = productDetailUrl + "&productId=" + mixAndMatchProductInfo.productId;
 58                                 if (mixAndMatchProductInfo.variantId != "")
 59                                 {
 60                                     productDetailPage += "&variantid=" + mixAndMatchProductInfo.variantId;
 61                                 }
 62                                 <li class="detail-discountproduct__content" style="cursor:pointer;">
 63                                     <a href="@productDetailPage" class="text-decoration-none d-block h-100 text-xl-center">
 64                                         <div class="h-100 d-flex flex-column justify-content-between">
 65                                             <div class="" style="border: 1px solid transparent;">
 66                                                 <div class="ratio position-relative" style="--bs-aspect-ratio: 75%">
 67                                                     <img src="/Admin/Public/GetImage.ashx?image=@(productModel.DefaultImage.Value)&amp;width=350&amp;Format=WebP&amp;Quality=70" class="h-100 w-100 " style="object-fit: contain;">
 68                                                 </div>
 69                                             </div>
 70                                             <div class="flex-fill d-flex flex-column justify-content-between cust-slider-mbinfo">
 71                                                 <div style="height:2.5em; text-align:center;">
 72                                                     <h3 class="h6 opacity-85" style="word-break:break-all;">@mixAndMatchProductInfo.productName</h3>
 73                                                 </div>
 74                                                 <div style="text-align:center;">
 75                                                     <p class="h6 m-0">
 76                                                         <span class="text-price fw-bold slideractiveprice">@mixAndMatchProductInfo.productPrice</span>
 77                                                     </p>
 78                                                 </div>
 79                                             </div>
 80                                         </div>
 81                                     </a>
 82                                 </li>
 83                             }
 84                         </ul>
 85                         <button type="button" title="@Translate("Previous slide")" class="slider-nav cusdiscount-slider__nav" style="z-index:2;"></button>
 86                         <button type="button" title="@Translate("Next slide")" class="slider-nav slider-nav-next cusdiscount-slider__nav" style="z-index:2;"></button>
 87                     </div>
 88                 </div>
 89             </div>
 90             <link rel="stylesheet" href="/Files/Templates/Designs/Swift/Assets/css/swiffy-slider.min.css">
 91             <script src="/Files/Templates/Designs/Swift/Assets/js/swiffy-slider.js"></script>
 92             <script>
 93                 swiffyslider.initSlider(document.querySelector('#slider_@(Model.ID)'));
 94             </script>
 95         }
 96     }
 97     else if (Pageview.IsVisualEditorMode)
 98     {
 99         <div class="alert alert-warning">@Translate("No products available")</div>
100     }
101