Autofac，MVC5和OWIN的依赖注入不起作用

Question

I am having difficulties integrating Autofac with MVC5 and Owin. It seems that MVC is skipping AutofacMvc integration and is still using System.Web.Mvc.DefaultControllerFactory to instantiate a controller, thus throwing

No parameterless constructor defined for this object

There's a great article from Alex Meyer-Gleaves on setting up Owin support for MVC 5 integrations in Autofac . I have followed that, and downloaded packages, but still not working. Here's what my Startup.cs looks like:

public void Configuration(IAppBuilder app)
{ 
    var container = AutofacConfig.Register();
    app.UseAutofacMiddleware(container);  // 1 - setting up autofac middleware (Autofac.Integration.Owin.dll)
    app.UseAutofacMvc(); // 2 - passing on life time scope created in Owin onto MVC request (Autofac.Integration.Mvc.Owin)
    DependencyResolver.SetResolver(new AutofacDependencyResolver(container)); // 3 - setting dependency resolver for MVC (Autofac.Integration.Mvc)
    RouteConfig.RegisterRoutes(RouteTable.Routes);
}

I have checked that my service was registered, my route is invoked successfully if I remove service parameter from constructor. What else I might be missing? Any hints where the problem might lie would be appreciated.

Answer 1

Apparently, the problem lied in the fact that I forgot to register controllers into Autofac. adding this line solved the problem:

builder.RegisterControllers(Assembly.GetExecutingAssembly());