DD4T-Linked Component Issue

Question

I am using the below code to access the field values for a linked component.

In the foreach line, it throws error that

The given key was not present in the dictionary

I have checked the component and the "main_nav" field has a component.

I have also tried by increasing the linklevel parameter but no luck. Please advise.

Added more details of the code.

   @foreach (var link in Model.Component.Fields["main_nav"].LinkedComponentValues) 
   { 
      <li id="@link.Fields["title"].Value.ToLower()">
      if (!link.Fields.ContainsKey("internal_link") && !link.Fields.ContainsKey("external_link")) { 
           <a id="@link.Fields["title"].Value.ToLower()Prompt">@link.Fields["title"].Value</a>
       } 
   }

And here is the stack trace returned:

[KeyNotFoundException: The given key was not present in the dictionary.] System.Collections.Generic.Dictionary`2.get_Item(TKey key) +9624813 ASP._Page_Views_Shared__Header_cshtml.Execute() in File location..34 System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +208 System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +97 System.Web.WebPages.StartPage.RunPage() +19 System.Web.WebPages.StartPage.ExecutePageHierarchy() +67 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +303

Answer 1

The most likely explanation is that the main_nav field is not of the type Component Link. It might be a text field or some other field.

For all field types except Component Link and Multimedia Link, the LinkedComponentValues property is null.

Answer 2

Are you sure you republished the page after changing the link level on your Component Template?

You should check your Content Data Store (Broker) database PAGE_CONTENT table for the XML and check that the main_nav field LinkedComponentValues element is populated with what you expect.