Using ASP.NET MVC with StructureMap

gistfile1.cs

Global.asax.cs:
    public class MvcApplication : HttpApplication
    {
        protected void Application_Start(object sender, EventArgs e)
        {
            // ...
            ControllerBuilder.Current.SetControllerFactory(new StructureMapControllerFactory());
        }

StructureMapControllerFactory.cs
	public class StructureMapControllerFactory : DefaultControllerFactory
	{
		protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
		{
			if (controllerType == null)
                Throw404(requestContext);

		    try
		    {
                return (IController)ObjectFactory.GetInstance(controllerType);
		    }
		    catch (InvalidOperationException ex)
		    {
                if (ex.Message.Contains("did not return a controller for the name"))
                {
                    Throw404(requestContext);
                }
		        throw;
		    }
		}

        private static void Throw404(RequestContext requestContext)
        {
            var message =
                "The controller for path '{0}' was not found or does not implement IController.".ToFormat(
                    requestContext.HttpContext.Request.Path);
            throw new HttpException(404, message);
        }
	}