c# - Autofac - MVC Controller 和 Web Api Controller 的依赖注入(inject)

Question

我在同一项目中有 MVC Controller (在 Controllers 文件夹中)和 Web Api Controller (在 Api 文件夹中):这是文件夹结构:

• Controller
  • 产品总监
• 应用程序接口(interface)
  • 产品总监

这是我的 Bootstrap 方法:

        private static void SetAutofacContainer()
        {
            var builder = new ContainerBuilder();
            builder.RegisterApiControllers(Assembly.GetExecutingAssembly());
            builder.RegisterControllers(Assembly.GetExecutingAssembly());
            //builder.RegisterType<UnitOfWork>().As<IUnitOfWork>().InstancePerRequest();
            builder.RegisterType<DbFactory>().As<IDbFactory>().InstancePerRequest();

            // Repositories
            builder.RegisterAssemblyTypes(typeof(ProductRepository).Assembly)
                .Where(t => t.Name.EndsWith("Repository"))
                .AsImplementedInterfaces().InstancePerRequest();

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

我无法将存储库注入(inject)我的 Web Api Controller 。这是我得到的异常:

An error occurred when trying to create a controller of type 'ProductController'. Make sure that the controller has a parameterless public constructor.

我做错了什么？

Answer 1

您还没有设置 Web API 的 GlobalConfiguration.Configuration.DependencyResolver；您只需设置 MVC 的 DependencyResolver。

添加以下行:

GlobalConfiguration.Configuration.DependencyResolver =
    new AutofacWebApiDependencyResolver(container);