c# – 使用Autofac将log4net注入控制器

None of the constructors found with ‘Public binding flags’ on
type ‘MvcApplication6.Controllers.HomeController’ can be invoked with the available services and parameters: Cannot resolve parameter ‘log4net.ILog logger’ of constructor ‘Void .ctor(log4net.ILog)’.

我创建了一个模块,使用正确的类型注入Log类：

public class LogInjectionModule : Module
{
    protected override void AttachToComponentRegistration(IComponentRegistry registry,IComponentRegistration registration)
    {
         registration.Preparing += OnComponentPreparing;
    }

    static void OnComponentPreparing(object sender,PreparingEventArgs e)
    {
        var t = e.Component.Activator.LimitType;
        e.Parameters = e.Parameters.Union(new[] 
        { 
            new ResolvedParameter((p,i) => p.ParameterType == typeof(ILog),(p,i) => LogManager.GetLogger(t)) 
        });
    }
}

然后我在我的ASP.NET MVC Application_Start方法中注册该模块：

protected void Application_Start()
{
     ContainerBuilder builder = new ContainerBuilder();
     builder.RegisterControllers(typeof (MvcApplication).Assembly) ;

     var container = builder.Build() ;
     DependencyResolver.SetResolver(new AutofacDependencyResolver(container)); 

     builder.RegisterModule(new LogInjectionModule());

     AreaRegistration.RegisterAllAreas();

     RegisterGlobalFilters(GlobalFilters.Filters);
     RegisterRoutes(RouteTable.Routes);
}

我在控制器中添加了一个构造函数,它将ILog作为参数：

namespace MvcApplication6.Controllers
{
   public class HomeController : Controller
   {
      ILog _log;

      public HomeController(ILog logger) 
      {
         _log = logger;
      }

      public ActionResult Index()
      {
         ViewBag.Message = "Welcome to ASP.NET MVC!";

         _log.Info("Log message from Index()");

         return View();
      }

      public ActionResult About()
      {
         _log.Info("Log message from About()");

         return View();
      }
   }
}

我相信我错过了一步,所以任何帮助都会受到赞赏.