MVC4RC and StructureMap

HomeController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcApplication1.Controllers
{
    public interface IHelloService
    {
        string Hello(string user);
    }
    public class HelloService : IHelloService
    {
        public string Hello(string user)
        {
            return "Hello " + user;
        }
    }

    public class HomeController : Controller
    {
        private readonly IHelloService _helloService;
        public HomeController(IHelloService helloService)
        {
            _helloService = helloService;
        }
        public ActionResult Index()
        {
            ViewBag.Message = _helloService.Hello("Steve");

            return View();
        }

        public ActionResult About()
        {
            ViewBag.Message = "Your app description page.";

            return View();
        }

        public ActionResult Contact()
        {
            ViewBag.Message = "Your contact page.";

            return View();
        }
    }
}

StructureMapMvc.cs

using System;
using System.Collections.Generic;
using System.Web.Http;
using System.Web.Http.Dependencies;
using System.Web.Mvc;
using Microsoft.Practices.ServiceLocation;
using StructureMap;
using StructureMap.ServiceLocatorAdapter;
using System.Linq;

[assembly: WebActivator.PreApplicationStartMethod(typeof(MvcApplication1.App_Start.StructuremapMvc), "Start")]

namespace MvcApplication1.App_Start
{
    public static class StructuremapMvc
    {
        public static void Start()
        {
            var container = (IContainer)IoC.Initialize();
            DependencyResolver.SetResolver(new SmDependencyResolver(container));
            // this override is needed because WebAPI is not using DependencyResolver to build controllers 
            GlobalConfiguration.Configuration.DependencyResolver = new StructureMapDependencyResolver(container);
        }
    }

    /// <summary>
    /// Wrapper for IDependencyScope, so that StructureMap plays nicely with built in mvc4 dependency resolution.
    /// </summary>
    public class StructureMapDependencyScope : ServiceLocatorImplBase, IDependencyScope
    {
        protected readonly IContainer Container;

        public StructureMapDependencyScope(IContainer container)
        {
            if (container == null)
                throw new ArgumentNullException("container");

            Container = container;
        }

        public object GetService(Type serviceType)
        {
            if (serviceType == null)
                return null;
            try
            {
                return serviceType.IsAbstract || serviceType.IsInterface
                         ? Container.TryGetInstance(serviceType)
                         : Container.GetInstance(serviceType);
            }
            catch
            {
                return null;
            }

        }

        /// <summary>
        ///        When implemented by inheriting classes, this method will do the actual work of resolving
        ///        the requested service instance.
        /// </summary>
        /// <param name="serviceType">Type of instance requested.</param>
        /// <param name="key">Name of registered service you want. May be null.</param>
        /// <returns>
        /// The requested service instance.
        /// </returns>
        protected override object DoGetInstance(Type serviceType, string key)
        {
            if (string.IsNullOrEmpty(key))
            {
                return Container.GetInstance(serviceType);
            }
            return Container.GetInstance(serviceType, key);
        }

        /// <summary>
        ///        When implemented by inheriting classes, this method will do the actual work of
        ///        resolving all the requested service instances.
        /// </summary>
        /// <param name="serviceType">Type of service requested.</param>
        /// <returns>
        /// Sequence of service instance objects.
        /// </returns>
        protected override IEnumerable<object> DoGetAllInstances(Type serviceType)
        {
            return Container.GetAllInstances(serviceType).Cast<object>();
        }

        public IEnumerable<object> GetServices(Type serviceType)
        {
            return Container.GetAllInstances(serviceType).Cast<object>();
        }

        public void Dispose()
        {
            Container.Dispose();
        }
    }

    /// <summary>
    /// Wrapper for IDependencyResolver so that StructureMap plays nicely with built in mvc 4 dependency resolution. 
    /// </summary>
    public class StructureMapDependencyResolver : StructureMapDependencyScope, System.Web.Http.Dependencies.IDependencyResolver
    {
        public StructureMapDependencyResolver(IContainer container)
            : base(container)
        {
        }

        public IDependencyScope BeginScope()
        {
            var child = Container.GetNestedContainer();
            return new StructureMapDependencyResolver(child);
        }
    }
}