Autofac register dll using Assembly.Load

asp.net-mvc-3, autofac, c#, model-view-controller

Solution

I assume that your assembly contains one or more implementations of the `IUser` interface. Now, when you run:

 builder.RegisterAssemblyTypes(services);

without any additional parameters you are actually registering all types in that assembly keyed by class. You will probably see that this resolve works:

GetInstance<SomeSpecificUserImplementation>();

In order to key your services by interface, simply do the following:

  builder.RegisterAssemblyTypes(services).AsImplementedInterfaces();

Now all your services will be keyed by the interfaces they implement instead of the specific class, thus the following will work:

GetInstance<IUser>();

Problem

I'm trying to register a dll named "BigEye.Business" and referenced that file to the mvc 3 project. But when i try to get instance of an object in that dll, autofac says it's not registered. Here is how i register and resolve the object: ``` private static IContainer SetDIContainer() { var builder = new ContainerBuilder(); builder.RegisterControllers(Assembly.GetExecutingAssembly()); builder.RegisterType<UserAuthManager>().As<IUserAuth>().InstancePerHttpRequest(); builder.RegisterType<SessionManager>().As<ISession>().InstancePerHttpRequest(); //Here is the code to register that dll var services = Assembly.Load("BigEye.Business"); builder.RegisterAssemblyTypes(services); IContainer container = builder.Build(); DependencyResolver.SetResolver(new AutofacDependencyResolver(container)); return container; } public static T GetInstance<T>() { IContainer container = SetDIContainer(); using(var httpRequestScope = container.BeginLifetimeScope("httpRequest")) { return httpRequestScope.Resolve<T>(); } } ``` And when i call GetInstance function i get "The requested service 'BigEye.Interfaces.Business.IUser' has not been registered". Should i register all the components in Business dll? Is there a way to do it? Because objects and services in Business will change in time. Thanks

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