Autofac Binding Examples

gistfile1.cs

using System;
using Autofac;

namespace LinkedList
{
    public class Program
    {
        static void Main()
        {
            var builder = new ContainerBuilder();
            builder.RegisterType<LastActivityUpdater>();
            builder.RegisterType<AnonymousUserLastActivityUpdater>();
            builder.Register(c => new UserService(c.Resolve<LastActivityUpdater>()));
            builder.Register(c => new AnonymousUserService(c.Resolve<AnonymousUserLastActivityUpdater>()));

            using (var container = builder.Build())
            {
                var userService = container.Resolve<UserService>();
                var anonymousUserService = container.Resolve<AnonymousUserService>();
            }

            Console.ReadKey();
        }
    }

    public class UserService
    {
        public UserService(ILastActivityUpdater updater)
        {
            Console.WriteLine("UserService got an instance of " + updater.GetType().Name);
        }
    }

    public class AnonymousUserService
    {
        public AnonymousUserService(ILastActivityUpdater updater)
        {
            Console.WriteLine("AnonymousUserService got an instance of " + updater.GetType().Name);
        }
    }

    public interface ILastActivityUpdater
    {
    }

    public class LastActivityUpdater : ILastActivityUpdater
    {
    }

    public class AnonymousUserLastActivityUpdater : ILastActivityUpdater
    {
    }
}

gistfile2.cs

using System;
using Autofac;

namespace LinkedList
{
    public class Program
    {
        static void Main()
        {
            var builder = new ContainerBuilder();
            builder.RegisterType<LastActivityUpdater>()
                .Named<ILastActivityUpdater>("defaultUpdater");
            builder.RegisterType<AnonymousUserLastActivityUpdater>()
                .Named<ILastActivityUpdater>("anonymousUpdater");

            builder.RegisterDecorator<ILastActivityUpdater>(
                (c, inner) => new LastActivityUpdaterDecorator(inner), "defaultUpdater");

            builder.Register(c => new UserService(c.Resolve<ILastActivityUpdater>()));
            builder.Register(c => new AnonymousUserService(c.ResolveNamed<ILastActivityUpdater>("anonymousUpdater")));

            using (var container = builder.Build())
            {
                var userService = container.Resolve<UserService>();
                var anonymousUserService = container.Resolve<AnonymousUserService>();
            }

            Console.ReadKey();
        }
    }

    public class UserService
    {
        public UserService(ILastActivityUpdater updater)
        {
            Console.WriteLine("UserService got an instance of " + updater.GetType().Name);
        }
    }

    class AnonymousUserService
    {
        public AnonymousUserService(ILastActivityUpdater updater)
        {
            Console.WriteLine("AnonymousUserService got an instance of " + updater.GetType().Name);
        }
    }

    public interface ILastActivityUpdater
    {
    }

    public class LastActivityUpdater : ILastActivityUpdater
    {
    }

    public class AnonymousUserLastActivityUpdater : ILastActivityUpdater
    {
    }

    public class LastActivityUpdaterDecorator : ILastActivityUpdater
    {
        public LastActivityUpdaterDecorator(ILastActivityUpdater updater)
        {
            Console.WriteLine("LastActivityUpdaterDecorator got an instance of " + updater.GetType().Name);
        }
    }
}