public class Person{public int Id { get; set; }public string Name { get; set; }public int Age { get; set; }public string Address { get; set; }}

    public interface IPersonRepository{List<Person> GetAll();Person Get(int id);Person Add(Person item);bool Update(Person item);bool Delete(int id);}

public class PersonRepository : IPersonRepository{List<Person> person = new List<Person>();public PersonRepository(){Add(new Person { Id = 1, Name = "joye.net1", Age = 18, Address = "中国上海" });Add(new Person { Id = 2, Name = "joye.net2", Age = 18, Address = "中国上海" });Add(new Person { Id = 3, Name = "joye.net3", Age = 18, Address = "中国上海" });}public List<Person> GetAll(){return person;}public Person Get(int id){return person.Find(p => p.Id == id);}public Person Add(Person item){if (item == null){throw new ArgumentNullException("item");}person.Add(item);return item;}public bool Update(Person item){if (item == null){throw new ArgumentNullException("item");}int index = person.FindIndex(p => p.Id == item.Id);if (index == -1){return false;}person.RemoveAt(index);person.Add(item);return true;}public bool Delete(int id){person.RemoveAll(p => p.Id == id);return true;}}

    public interface IPersonServices{List<Person> GetAll();}

    public class PersonServices : IPersonServices{//程序集属性注入public IPersonRepository iPerson;public List<Person> GetAll(){return iPerson.GetAll();}}

public class AutoFacBootStrapper{public static void CoreAutoFacInit(){var builder = new ContainerBuilder();HttpConfiguration config = GlobalConfiguration.Configuration;SetupResolveRules(builder);////注册所有的Controllers//builder.RegisterControllers(Assembly.GetExecutingAssembly()).PropertiesAutowired();//注册所有的ApiControllers
            builder.RegisterApiControllers(Assembly.GetExecutingAssembly()).PropertiesAutowired();var container = builder.Build();//注册api容器需要使用HttpConfiguration对象config.DependencyResolver = new AutofacWebApiDependencyResolver(container);DependencyResolver.SetResolver(new AutofacDependencyResolver(container));}private static void SetupResolveRules(ContainerBuilder builder){//WebAPI只用引用services和repository的接口，不用引用实现的dll。//如需加载实现的程序集，将dll拷贝到bin目录下即可，不用引用dllvar iServices = Assembly.Load("WebAPI.IServices");var services = Assembly.Load("WebAPI.Services");var iRepository = Assembly.Load("WebAPI.IRepository");var repository = Assembly.Load("WebAPI.Repository");//根据名称约定（服务层的接口和实现均以Services结尾），实现服务接口和服务实现的依赖
            builder.RegisterAssemblyTypes(iServices, services).Where(t => t.Name.EndsWith("Services")).AsImplementedInterfaces();//根据名称约定（数据访问层的接口和实现均以Repository结尾），实现数据访问接口和数据访问实现的依赖
            builder.RegisterAssemblyTypes(iRepository, repository).Where(t => t.Name.EndsWith("Repository")).AsImplementedInterfaces();}}

        protected void Application_Start(){GlobalConfiguration.Configure(WebApiConfig.Register);AreaRegistration.RegisterAllAreas();RouteConfig.RegisterRoutes(RouteTable.Routes);FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);BundleConfig.RegisterBundles(BundleTable.Bundles);//程序启动注入
            AutoFacBootStrapper.CoreAutoFacInit();}

        public IPersonServices IServices { get; set; }// GET api/<controller>public IEnumerable<string> Get(){var list = IServices.GetAll();return new string[] { "value1", "value2" };}