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Error executing template "Designs/Swift/Paragraph/MerchantListingStructuredData__ProductDetailPage.cshtml"
System.NullReferenceException: Object reference not set to an instance of an object.
   at CompiledRazorTemplates.Dynamic.RazorEngine_b6cee715e15c4e96b4f93a29505b6e77.Execute() in D:\dynamicweb.net\Solutions\nextech\Superhome.swiftstaging.dynamicweb-cms.com\files\Templates\Designs\Swift\Paragraph\MerchantListingStructuredData__ProductDetailPage.cshtml:line 53
   at RazorEngine.Templating.TemplateBase.RazorEngine.Templating.ITemplate.Run(ExecuteContext context, TextWriter reader)
   at RazorEngine.Templating.RazorEngineService.RunCompile(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass16_0.<RunCompile>b__0(TextWriter writer)
   at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
   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 System.Web
  4     @{ ProductViewModel product = null;
  5         if (Dynamicweb.Context.Current.Items.Contains("ProductDetails"))
  6         {
  7             product = (ProductViewModel)Dynamicweb.Context.Current.Items["ProductDetails"];
  8         }
  9         else if (Pageview.Page.Item["DummyProduct"] != null && Pageview.IsVisualEditorMode)
 10         {
 11             var pageViewModel = Dynamicweb.Frontend.ContentViewModelFactory.CreatePageInfoViewModel(Pageview.Page);
 12             ProductListViewModel productList = pageViewModel.Item.GetValue("DummyProduct") != null ? pageViewModel.Item.GetValue("DummyProduct") as ProductListViewModel : new ProductListViewModel();
 13     
 14             if (productList?.Products is object)
 15             {
 16                 product = productList.Products[0];
 17             }
 18         } 
 19      }
 20     
 21     @if (product is object)
 22     {
 23         string defaultImage = product.DefaultImage != null ? product.DefaultImage.Value : "";
 24         IEnumerable<MediaViewModel> assetsList = new MediaViewModel[] { };
 25         assetsList = assetsList.Union(product.ImagePatternImages);   
 26         @SnippetStart("MerchantlistingJSON")   
 27         string siteLanguage = Pageview.Area.CultureInfo.Name;
 28         Uri url = Dynamicweb.Context.Current.Request.Url;
 29         string hostName = url.Host; // domain.com/da-dk or domain.com/en-us     
 30         <script type="application/ld+json">
 31                         {
 32                         "@@context": "https://schema.org/",
 33                         "@@type": "Product",
 34                         "name": "@product.Name",
 35                         "image":  @if (product.DefaultImage.Value != null && !string.IsNullOrEmpty(product.DefaultImage.Value.ToString())) {<text> [
 36                         @{
 37                             var allImages = new List<string> { product.DefaultImage.Value };
 38                             allImages.AddRange(assetsList.Select(a => a.Value));
 39                             for (int i = 0; i < allImages.Count; i++)
 40                             {
 41                                 <text>"@url.Scheme://@hostName@allImages[i]"</text> if (i < allImages.Count - 1) {<text>,</text>}<text></text>
 42                             }}
 43                         ]</text>},
 44                         "description": "@HttpUtility.JavaScriptStringEncode(product.ShortDescription)",
 45                         "sku": "@product.Number",
 46                         "mpn": "@product.Number",
 47                         "brand": {
 48                                 "@@type": "Brand",
 49                                 "name": "@product.ProductFields["Brand"].Value"
 50                         },
 51                         "offers": {
 52                                 "@@type": "Offer",
 53                                 "url": @{var defaultGroupId = product.PrimaryOrDefaultGroup.Id;var selectedDetailsPage = Dynamicweb.Ecommerce.Services.ProductGroups.GetGroup(defaultGroupId).Meta.PrimaryPage;selectedDetailsPage = !string.IsNullOrEmpty(selectedDetailsPage) ? selectedDetailsPage : $"Default.aspx?ID={GetPageIdByNavigationTag("ProductDetailPage").ToString()}"; string productDetailLink = Dynamicweb.Frontend.SearchEngineFriendlyURLs.GetFriendlyUrl($"{selectedDetailsPage}&GroupID={defaultGroupId}&ProductID={product.Id}");} "@url.Scheme://@hostName@productDetailLink",
 54                                 "priceCurrency": "@product.Price.CurrencyCode",
 55                                 "price": @product.Price.PriceWithoutVat,
 56                                 "itemCondition": "https://schema.org/NewCondition",
 57                                 "availability": @{double? currentStockLevel = product.StockLevel;string stockStateLabel = currentStockLevel > 0 ? Translate("InStock") : Translate("OutOfStock");}"https://schema.org/@stockStateLabel"
 58                             }
 59                         }
 60             </script>
 61             @SnippetEnd("MerchantlistingJSON") 
 62     }
 63         else if (Pageview.IsVisualEditorMode)
 64         {
 65             <div class="alert alert-warning">@Translate("No products available")</div>
 66         }
 67     
 68     
 69