WebApi 2 - 无法用结构图确定 DataProtection.IDataProtector 依赖注入

Question

我正在使用 this beriliant 项目作为我的 MVC 项目的基础。但是当我将 WebAPI 用于项目时，IDataProtector 注入出现问题。我重新设计了 base 和 upload here，并添加了一个用于测试 WebAPI 授权的控制台项目。

这是结构图初始化：

            private static readonly Lazy<Container> _containerBuilder =
        new Lazy<Container>(initStructureMap, LazyThreadSafetyMode.ExecutionAndPublication);

    public static IContainer Container
    {
        get { return _containerBuilder.Value; }
    }
return new Container(ioc =>
        {
            ioc.For<IUnitOfWork>().HybridHttpOrThreadLocalScoped().Use(() => new DbContext());

            ioc.For<IDataSerializer<AuthenticationTicket>>().Use<TicketSerializer>();
            ioc.For<ISecureDataFormat<AuthenticationTicket>>().Use<SecureDataFormat<AuthenticationTicket>>();

        });

而在WebApiConfig中classDI是这样的：

            var container = StructuremapMvc.Container;
        GlobalConfiguration.Configuration.Services.Replace(
            typeof(IHttpControllerActivator), new  StructureMapHttpControllerActivator(container));

在我的初创公司中，我使用 IAppBuilder 创建数据保护器：

        public void ConfigureAuth(IAppBuilder app)
    {
        StructuremapMvc.Container.Configure(config =>
        {
            config.For<IDataProtectionProvider>()
                  .HybridHttpOrThreadLocalScoped()
                  .Use(() => app.GetDataProtectionProvider());
        });
     }

它在WebApiConfig 和IDataProtection 在WebApi 中不起作用后启动。我的 ServiceLayer 在单独的项目中，DataProtection 需要在那里注入。

Answer 1

您需要在容器中显式注册 IDataProtector 的实现。

示例配置可能如下所示：

ioc.For<IDataProtector>().Use(() => new DpapiDataProtectionProvider().Create("ASP.NET Identity"));
ioc.For<ITextEncoder>().Use<Base64UrlTextEncoder>();

请记住，此特定配置可能不适合您的确切需求。

希望对您有所帮助！

Answer 2

您需要在项目中添加两个 class :

1-StructureMapDependencyScopeClass

using StructureMap;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http.Dependencies;

namespace Project.Helpers
{
    public class StructureMapDependencyScope : IDependencyScope
    {
        protected readonly IContainer Container;

        public StructureMapDependencyScope(IContainer container)
        {
            if (container == null)
            {
                throw new ArgumentNullException("container");
            }

            this.Container = container;
        }

        public void Dispose()
        {
            this.Container.Dispose();
        }

        public object GetService(Type serviceType)
        {
            if (serviceType == null)
            {
                return null;
            }

            try
            {
                return serviceType.IsAbstract || serviceType.IsInterface
                           ? this.Container.TryGetInstance(serviceType)
                           : this.Container.GetInstance(serviceType);
            }
            catch
            {
                return null;
            }
        }

        public IEnumerable<object> GetServices(Type serviceType)
        {
            return this.Container.GetAllInstances(serviceType).Cast<object>();
        }
    }
}

2-StructureMapDependencyResolver Class

using StructureMap;
using System.Web.Http.Dependencies;

namespace Project.Helpers
{
    public class StructureMapDependencyResolver : StructureMapDependencyScope, IDependencyResolver
    {
        public StructureMapDependencyResolver(IContainer container)
            : base(container)
        {
        }
        public IDependencyScope BeginScope()
        {
            IContainer child = this.Container.GetNestedContainer();
            return new StructureMapDependencyResolver(child);
        }
    }
}

最后在 WebApiConfig Class:

中将此代码替换为您的代码

// IoC Config
var container = SmObjectFactory.Container;

// Web API configuration and services
config.DependencyResolver = new StructureMapDependencyResolver(container);

通过 StructureMap here.

阅读更多关于 ASP.NET MVC 4 和 Web API 中的依赖注入

WebApi 2 - 无法用结构图确定 DataProtection.IDataProtector 依赖注入

WebApi 2 -cant determined DataProtection.IDataProtector Dependency Injection with structuremap

asp.net-web-api

dependency-injection

asp.net-mvc-5

structuremap