在网页API autofac参数的构造函数错误2

Question

我使用Autofac作为国际奥委会和这里嗨是我的结构：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 

namespace AdTudent.Repo 
{ 
    public interface IRepository 
    { 
     IAdvertisementRepository Advertisements { get; set; } 
     IProfileRepository Profiles { get; set; } 
    } 
} 

，我的仓库类：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 

namespace AdTudent.Repo 
{ 
    public class Repositories : IRepository 
    { 
     public Repositories(IAdvertisementRepository advertisementRepository, 
          IProfileRepository profileRepository) 
     { 
      Advertisements = advertisementRepository; 
      Profiles = profileRepository; 
     } 
     public IAdvertisementRepository Advertisements { get; set; } 
     public IProfileRepository Profiles { get; set; } 
    } 
} 

和我的启动类是：

public partial class Startup 
{ 
    public void Configuration(IAppBuilder app) 
    { 
     var builder = new ContainerBuilder(); 

     builder.RegisterType<Repositories>().As<IRepository>(); 
     builder.Register<IGraphClient>(context => 
     { 
      var graphClient = new GraphClient(new Uri("http://localhost:7474/db/data")); 
      graphClient.Connect(); 
      return graphClient; 
     }).SingleInstance(); 
     // STANDARD WEB API SETUP: 

     // Get your HttpConfiguration. In OWIN, you'll create one 
     // rather than using GlobalConfiguration. 
     var config = new HttpConfiguration(); 

     // Register your Web API controllers. 
     //builder.RegisterApiControllers(Assembly.GetExecutingAssembly()); 

     // Run other optional steps, like registering filters, 
     // per-controller-type services, etc., then set the dependency resolver 
     // to be Autofac. 

     var container = builder.Build(); 
     config.DependencyResolver = new AutofacWebApiDependencyResolver(container); 

     app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll); 

     // OWIN WEB API SETUP: 

     // Register the Autofac middleware FIRST, then the Autofac Web API middleware, 
     // and finally the standard Web API middleware. 
     app.UseAutofacMiddleware(container); 
     app.UseAutofacWebApi(config); 
     app.UseWebApi(config); 

     ConfigureAuth(app); 
    } 
} 

，这里是我的帐户控制：

public class AccountController : ApiController 
{ 
    private IRepository _repository; 
    private const string LocalLoginProvider = "Local"; 
    private ApplicationUserManager _userManager; 
    private IGraphClient _graphClient; 


    public ISecureDataFormat<AuthenticationTicket> AccessTokenFormat { get; private set; }  

    public AccountController(IRepository repository, IGraphClient graphClient, 
     ISecureDataFormat<AuthenticationTicket> accessTokenFormat) 
    { 

     AccessTokenFormat = accessTokenFormat; 
     _repository = repository; 
     _graphClient = graphClient; 

    } 
} 

但我总是这个问题

“消息”：“发生了错误。” “ExceptionMessage”：“试图创建类型的控制装置‘的AccountController’时发生错误。 “， ”ExceptionType“：”System.InvalidOperationException“， ”StackTrace“：”at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create（HttpRequestMessage request，HttpControllerDescriptor controllerDescriptor，Type controllerType个）\ r \ n在System.Web.Http.Controllers.HttpControllerDescriptor.CreateController（HttpRequestMessage请求个）\ r \ n在System.Web.Http.Dispatcher.HttpControllerDispatcher.d__1.MoveNext（）

我搜索在互联网上，但我找不到任何可以帮助任何人可以引导我？

Answer 1

每WebApi OWIN documentation：

在OWIN集成一个常见的错误是使用GlobalConfiguration.Configuration的。 在OWIN中，您从头开始创建配置。使用OWIN集成时，不应在任何地方引用GlobalConfiguration.Configuration。

它看起来像你有几个问题：

1. 的HttpConfiguration需要使用OWIN时newed起来。
2. 您错过了UseAutofacWebApi虚拟方法调用。

您还需要Autofac WebApi OWIN package根据文档。

public class Startup 
{ 
    public void Configuration(IAppBuilder app) 
    { 
     var builder = new ContainerBuilder(); 

     // STANDARD WEB API SETUP: 

     // Get your HttpConfiguration. In OWIN, you'll create one 
     // rather than using GlobalConfiguration. 
     var config = new HttpConfiguration(); 

     // Register your Web API controllers. 
     builder.RegisterApiControllers(Assembly.GetExecutingAssembly()); 

     // Run other optional steps, like registering filters, 
     // per-controller-type services, etc., then set the dependency resolver 
     // to be Autofac. 
     var container = builder.Build(); 
     config.DependencyResolver = new AutofacWebApiDependencyResolver(container); 

     app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll); 

     // OWIN WEB API SETUP: 

     // Register the Autofac middleware FIRST, then the Autofac Web API middleware, 
     // and finally the standard Web API middleware. 
     app.UseAutofacMiddleware(container); 
     app.UseAutofacWebApi(config); 
     app.UseWebApi(config); 
    } 
} 

Answer 2

您还没有告诉Autofac如何创建ISecureDataFormat<AuthenticationTicket>实例。

在您拨打builder.Build()之前，在您的启动课程中添加此代码。

builder.RegisterType<ISecureDataFormat<AuthenticationTicket>>().As<TicketDataFormat>(); 

Answer 3

检查您的Global.asax.cs。你应该删除这条线，如果你有它：

GlobalConfiguration.Configure(WebApiConfig.Register); 

您可以将其移动到启动。CS这样的配置：

WebApiConfig.Register(config);