使用AutoFac實現依賴注入(封裝一個注冊類)

 public class AutoFacBootStrapper
    {
        public static void CoreAutoFacInit()
        {
            var builder = new ContainerBuilder();
            HttpConfiguration config = GlobalConfiguration.Configuration;
            SetupResolveRules(builder);
            //注冊所有的Controllers,// 通過PropertiesAutowired制定類型A在獲取時會自動注入A的屬性//InstancePerLifetimeScope 保證對象生命周期基於請求//InstancePerDependency 對每一個依賴或每一次調用創建一個新的唯一的實例，這也是默認的創建實例的方式。
            builder.RegisterControllers(Assembly.GetExecutingAssembly()).PropertiesAutowired().InstancePerDependency();
            //注冊所有的ApiControllers
            builder.RegisterApiControllers(Assembly.GetExecutingAssembly()).PropertiesAutowired().InstancePerDependency();
            builder.RegisterType<MemberQueryFilterAttribute>().PropertiesAutowired();//注意，這里要把我們的全局Filter注冊到Autofac中
            builder.RegisterType<ParamsCheckFilterAttribute>().PropertiesAutowired();
            builder.RegisterWebApiFilterProvider(GlobalConfiguration.Configuration);
            var container = builder.Build();
            //注冊api容器需要使用HttpConfiguration對象
            config.DependencyResolver = new AutofacWebApiDependencyResolver(container);
            //注冊MVC容器
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
        }

        private static void SetupResolveRules(ContainerBuilder builder)
        {
            //WebAPI只用引用BLL和DAL的接口，不用引用實現的dll。
            //如需加載實現的程序集，將dll拷貝到bin目錄下即可，不用引用dll
            var iBLL = Assembly.Load("cpm.IBLL");
            var BLL = Assembly.Load("cpm.BLL");
            var iDAL = Assembly.Load("cpm.IDAL");
            var DAL = Assembly.Load("cpm.DAL");

            //根據名稱約定（服務層的接口和實現均以BLL結尾），實現服務接口和服務實現的依賴
            builder.RegisterAssemblyTypes(iBLL, BLL)
              .Where(t => t.Name.EndsWith("BLL"))
              .AsImplementedInterfaces().PropertiesAutowired().InstancePerDependency();

            //根據名稱約定（數據訪問層的接口和實現均以DAL結尾），實現數據訪問接口和數據訪問實現的依賴
            builder.RegisterAssemblyTypes(iDAL, DAL)
              .Where(t => t.Name.EndsWith("DAL"))
              .AsImplementedInterfaces().PropertiesAutowired().InstancePerDependency();
            //注冊其他模塊
            builder.RegisterModule<DbModule>();
            builder.RegisterModule<WebModule>();
        }
    }

  /// <summary>
    /// web通用類注冊
    /// </summary>
    public class WebModule:Module
    {
        protected override void Load(ContainerBuilder builder)
        { 
            //這里的示例 具體情況自己創建
            builder.Register<IUserService>(c => RequestWrapper<IUserService>.CreateInstance()).InstancePerDependency();
             

        }
    }

 

在webapi項目global文件重要啟動注入