如何将Autofac与WepApi 2和Owin集成？

我正在使用此软件包将Autofac与我的WebApi Owin应用程序集成：

https://www.nuget.org/packages/Autofac.WebApi2.Owin

并关注这篇文章：

https://alexmg.com/owin-support-for-the-web-api-2-and-mvc-5-integrations-in-autofac/

我在Startup.cs中的代码如下所示：

var config = new HttpConfiguration(); IContainer container = EngineContext.InitializeEngine(); var dependencyResolver = new AutofacWebApiDependencyResolver(container); config.DependencyResolver = dependencyResolver; app.UseAutofacMiddleware(container); app.UseAutofacWebApi(config); WebApiConfig.Register(config); app.UseWebApi(config); 

无论我如何旋转它，重新排列代码或其他任何东西，Autofac都无法解决任何问题。 在Owin之前，我的Global.asax方法运行得很好：

  protected void Application_Start() { IContainer container = EngineContext.InitializeEngine(); var dependencyResolver = new AutofacWebApiDependencyResolver(container); GlobalConfiguration.Configuration.DependencyResolver = dependencyResolver; GlobalConfiguration.Configure(WebApiConfig.Register); } 

我错过了什么？

谢谢

  var dependencyResolver = new AutofacWebApiDependencyResolver(container); config.DependencyResolver = dependencyResolver; 

 var builder = new ContainerBuilder(); builder.RegisterApiControllers(Assembly.GetExecutingAssembly()).InstancePerRequest();