asp.net - Autofac WebApi 2 OWIN 不工作

Question

使用 OWIN 时遇到 Autofac 和 WebApi2 问题。基本上构造函数没有被注入(inject)。

public class Startup
{
    public void Configuration(IAppBuilder app)
    {
        var config = new HttpConfiguration();
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "Default Route",
            routeTemplate: "{controller}.{ext}"
        );

        config.Routes.MapHttpRoute(
            name: "Default Route with Id",
            routeTemplate: "{controller}/{id}.{ext}",
            defaults: new { id = RouteParameter.Optional }
        );

        var builder = new ContainerBuilder();

        builder.RegisterApiControllers(Assembly.GetExecutingAssembly());
        builder.Register(c => new Logger()).As<ILogger>().InstancePerRequest();

        var container = builder.Build();
        var resolver = new AutofacWebApiDependencyResolver(container);
        GlobalConfiguration.Configuration.DependencyResolver = resolver;

        app.UseAutofacWebApi(GlobalConfiguration.Configuration);
        app.UseWebApi(config);
    }
}

public class UsersController : ApiController
{
    private readonly ILogger _logger;

    public UsersController(ILogger logger)
    {
         _logger = logger;
    }
}

我正在使用 Autofac.Integration.Owin nuget alpha 包。我错过了什么？

Answer 1

尝试自始至终使用config配置对象。在中间，您切换到GlobalConfiguration。在 OWIN + Web API 中，您不会使用静态配置对象，而仅使用您在配置 OWIN 应用程序时创建的实例。