asp.net mvc 3 - Load Razor view from db, but ViewBag is broken

Question

I'm pulling a razor view's markup from the database, as detailed in this question:

ASP.NET MVC load Razor view from database

I can pull the view, but it fails on execution because ViewBag is not recognized.

CS0103: The name 'ViewBag' does not exist in the current context

Any suggestions?

Here's the source:

global:

protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            System.Web.Hosting.HostingEnvironment.RegisterVirtualPathProvider(new BearForce.Web.Core.DbPathProvider());
            RegisterGlobalFilters(GlobalFilters.Filters);
            RegisterRoutes(RouteTable.Routes);
        }

my path provider:

namespace BearForce.Web.Core
{
    public class DbPathProvider : VirtualPathProvider
    {
        public DbPathProvider()
            : base()
        {

        }

        public override bool FileExists(string virtualPath)
        {
            var repo = new Repository();

            var viewPage = repo.GetView(240, virtualPath);

            if (base.FileExists(virtualPath))
            {
                return true;
            }

            if (viewPage != null)
            {
                return true;
            }

            return false;

        }

        public override VirtualFile GetFile(string virtualPath)
        {
            if (base.FileExists(virtualPath))
            {
                return base.GetFile(virtualPath);
            }

            var repo = new Repository();
            var result = repo.GetView(240, virtualPath);

            var vf = new DbVirtualFile(virtualPath, result.Markup);
            return vf;
        }


    }
}

my Virtual File:

  public class DbVirtualFile : System.Web.Hosting.VirtualFile
    {
        string _fileContents = string.Empty;
        public DbVirtualFile(string path, string fileContents)
            : base(path)
        {
            _fileContents = fileContents;
         }

        public override System.IO.Stream Open()
        {
            return new System.IO.MemoryStream(System.Text.ASCIIEncoding.ASCII.GetBytes(_fileContents));
        }
    }

My Controller:

  public ActionResult Index()
        {
            ViewBag.Title = "aaah!!! Muppets!!! Help!!!!!";

            return View();
        }

Obviously, this is a proof of concept, so the names are all silly and the code sloppy as hell...

Answer 1

For future people who get this error, you can get this exact error if your web.config files are missing from your Views and your root project folder.