DD4T Template in SDL Web 8.5 Page Returning Null Value

Question

1. SDL Web 8.5 Using DD4T Template Publishing to broker DB its working fine. URL and Page Content exist in relavant tables. By the timing we published into HTML file.
2. Visual studio 2015 we created published to IIS in .Net application. Below setup added in Visual Studio solution.(DD4T.MVC5.2.2.4,DD4T.DI.Autofac.2.2.3,DD4T.Providers.SDLWeb8.5.CIL.2.2.2)
3. Whenever creating Views in solution under TridionPage folder same name using which we used in Page Template Metadata.
4. After trying access to the page but throwing error. "The resource you are looking for has been removed, had its name changed, or is temporarily unavailable"
5. When we tracking failed request tracing its showing attached error file.

Kindly appreciate your help.

Answer 1

Found the issue in your Global.ascx.cs file, The following below line wrong, it should register your PageController class not MvcApplication class

builder.RegisterControllers(typeof(MvcApplication).Assembly);

Corrected Global.ascx.cs file

public class MvcApplication : System.Web.HttpApplication
{
    ILifetimeScope BuildContainer()
    {
        var builder = new ContainerBuilder();
        builder.RegisterControllers(typeof(PageController).Assembly);
        builder.UseDD4T();
        return builder.Build();
    }
    protected void Application_Start()
    {
        var builder = BuildContainer();
        DependencyResolver.SetResolver(new AutofacDependencyResolver(builder));

        AreaRegistration.RegisterAllAreas();
        RouteConfig.RegisterRoutes(RouteTable.Routes);
    }
}

In DD4T 2 - Instead of TridionControllerBase you can also use ModelControllerBase for View Model Build using ViewModelFactory

public class PageController : ModelControllerBase
{

    public PageController(IPageFactory pageFactory, IComponentPresentationFactory componentPresentationFactory,
    ILogger logger, IDD4TConfiguration config, IViewModelFactory viewModelFactory)
        : base(pageFactory, componentPresentationFactory, logger, config, viewModelFactory)
    {

    }

    public ActionResult Page(string url)
    {
        url = !url.StartsWith("/") ? "/" + url : url;

        IPage page = GetPage(url);
        if (page == null) { 

            //TODO return 404 not found page
        }

        var pageViewModel = ViewModelFactory.BuildViewModel(page);

        return View(GetViewName(page), pageViewModel);
    }
}

I hope it helps to fix your issue.