c# – 没有匹配的绑定可用,并且该类型不可自绑定.激活IProductsR

在第七章中,我试图按照书中的例子制作一个小应用程序.

在设置并尝试加载产品列表后,应用无法加载.

我正在尝试创建抽象存储库IProductRepository的模拟实现,并且只要Ninject获得对IProductRepository接口的实现的请求,就会返回模拟对象.

我搜索并查看了其他问题/答案,发现没有什么可以帮助解决我的问题,让我继续学习.这可能是基本的东西,但我真的想知道什么,为什么不能正常工作.

public static class NinjectWebCommon 
    {
        private static readonly Bootstrapper bootstrapper = new Bootstrapper();

        /// <summary>
        /// Starts the application
        /// </summary>
        public static void Start() 
        {
            DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
            DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
            bootstrapper.Initialize(CreateKernel);
        }

        /// <summary>
        /// Stops the application.
        /// </summary>
        public static void Stop()
        {
            bootstrapper.ShutDown();
        }

        /// <summary>
        /// Creates the kernel that will manage your application.
        /// </summary>
        /// <returns>The created kernel.</returns>
        private static IKernel CreateKernel()
        {
            var kernel = new StandardKernel();
            kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
            kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();

            RegisterServices(kernel);
            return kernel;
        }

        /// <summary>
        /// Load your modules or register your services here!
        /// </summary>
        /// <param name="kernel">The kernel.</param>
        private static void RegisterServices(IKernel kernel)
        {
            DependencyResolver.SetResolver(new NinjectDependencyResolver(kernel));
        }        
    }
}

接下来是我的NinjectDependencyResolver类：

public class NinjectDependencyResolver : IDependencyResolver
    {

        private IKernel kernel;

        [Inject]
        public NinjectDependencyResolver(IKernel kernelParam)
        {
            kernel = kernelParam;
            AddBindings();
        }


        public object GetService(Type serviceType)
        {
            return kernel.TryGet(serviceType);
        }

        public IEnumerable<object> GetServices(Type serviceType)
        {
            return kernel.GetAll(serviceType);
        }


        private void AddBindings()
        {
            var mock = new Mock<IProductsRepository>();

            mock.Setup(m => m.Products).Returns(new List<Product>
            {
                new Product { Name = "Fotball",Price = 25 },new Product { Name = "Surf Board",Price = 45 },new Product { Name = "Running Shoes",Price = 95 }
            });

            kernel.Bind<IProductsRepository>().ToConstant(mock.Object);
        }
    }

这是我的控制器类：

public class ProductController : Controller
{


    private IProductsRepository repository;



    public ProductController(IProductsRepository productRepository)
    {
        repository = productRepository;
    }



    public ViewResult List()
    {
        return View(repository.Products);
    }

我得到的错误如下：

激活IProductsRepository时出错
没有匹配的绑定可用,并且该类型不可自绑定.
激活路径：
?2)将依赖项IProductsRepository注入到ProductController类型的构造函数的参数productRepository中.
?1)对ProductController的请求.
建议：
?1)确保已为IProductsRepository定义了绑定.
?2)如果在模块中定义了绑定,请确保已将模块加载到内核中.
?3)确保您没有意外创建多个内核.
?4)如果使用构造函数参数,请确保参数名称与构造函数参数名称匹配.
?5)如果使用自动模块加载,请确保搜索路径和过滤器正确无误.