使用Autofac在ASP.NET Web API上實現依賴注入

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在ASP.NET Web API裡使用Autofac

1.通過NuGet安裝Autofac.WebApi（當時安裝的是Autofac 3.1.0）

PM > Install-Package Autofac.WebApi

2.在App_Start檔案夾下建立AutofacWebApiConfig類

 public class AutofacWebApiConfig    {        public static void Run()        {            SetAutofacWebApi();        }        private static void SetAutofacWebApi()        {            ContainerBuilder builder = new ContainerBuilder();            HttpConfiguration config = GlobalConfiguration.Configuration;            // Register API controllers using assembly scanning.            builder.RegisterApiControllers(Assembly.GetExecutingAssembly());            builder.RegisterType<ValueService>().As<IValueService>()                .InstancePerApiRequest();            var container = builder.Build();            // Set the WebApi dependency resolver.            config.DependencyResolver = new AutofacWebApiDependencyResolver(container);        }

3.在Global中添加以下代碼

protected void Application_Start()        {            AreaRegistration.RegisterAllAreas();            WebApiConfig.Register(GlobalConfiguration.Configuration);            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);            RouteConfig.RegisterRoutes(RouteTable.Routes);            BundleConfig.RegisterBundles(BundleTable.Bundles);            //Call Autofac DI configurations               AutofacWebApiConfig.Run();        }

 

使用Autofac在ASP.NET Web API上實現依賴注入