1

我在 C# 4.5 项目中使用 Ninject 作为 IoC 容器。我正在尝试使用 Ninject 注入抽象工厂模式，该模式在 MVC 中运行良好，但在 Web Api 中运行良好。

我安装了以下内容：

Ninject 3.0.1.10
Ninject.Extensions.WCF 3.0.0.5
Ninject.MVC3 3.0.0.6
Ninject.Web.Common 3.0.0.7
SignalR.Ninject

我的工厂类如下所示：

public interface IBusinessEngineFactory
{
    T GetBusinessEngine<T>() where T : IBusinessEngine;
}

public interface IBusinessEngine
{
}

public class BusinessEngineFactory : IBusinessEngineFactory
{

    private IKernel Kernel { get; set; }

    public BusinessEngineFactory(IKernel kernel)
    {
        Kernel = kernel;
    }

    T IBusinessEngineFactory.GetBusinessEngine<T>()
    {
        return Kernel.Get<T>();
    }
}

我有标准的 NinjectWebCommon：

公共静态类 NinjectWebCommon { 私有静态只读 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);
        // Install our Ninject-based IDependencyResolver into the Web API config
        GlobalConfiguration.Configuration.DependencyResolver = new NinjectResolver(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)
    {
        kernel.Bind<IUserIdentity>().To<UserIdentity>();
        kernel.Bind<IUnitOfWork>().To<UnitOfWork>();
        kernel.Bind<IAlarmEngine>().To<AlarmEngine>();
        kernel.Bind<IBusinessEngineFactory>().To<BusinessEngineFactory>();
    }        
}

这是在控制器中设置的

public class UserController : BaseController
{

    public UserController(IBusinessEngineFactory businessEngineFactory, IUnitOfWork unitOfWork, UserIdentity userIdentity)
        : base(businessEngineFactory, unitOfWork, userIdentity)
    {

    }

...

    public ActionResult Edit(int id = 0)
    {
...
        var x = BusinessEngineFactory.GetBusinessEngine<IAlarmEngine>();
        x.ProcessAlarmEventUpdate("test");

        return View(x);
    }
}

哪个工作正常。我遇到问题的地方是 WebAPIController 中的相同代码：

public class AlarmWebApiController : ApiController
{

    public IBusinessEngineFactory BusinessEngineFactory { get; set; }

    public IUnitOfWork UnitOfWork {get; set;}

    public IUserIdentity UserIdentity { get; set; }

    public AlarmWebApiController(IBusinessEngineFactory businessEngineFactory, IUnitOfWork unitOfWork, IUserIdentity userIdentity)
    {
        if (businessEngineFactory == null) throw new NullReferenceException("businessEngineFactory");
        BusinessEngineFactory = businessEngineFactory;
        if (unitOfWork == null) throw new NullReferenceException("unitOfWork");
        UnitOfWork = unitOfWork;
        if (userIdentity == null) throw new NullReferenceException("userIdentity");
        UserIdentity = userIdentity;
    }

}

当我运行它时，MVC 控制器处理正常，但 Web API 函数没有，并且我得到了在调用 webapi 的构造函数中的任何代码之前发生的模糊错误消息。

“加载 Ninject 组件 ICache 时出错

内核的组件容器中没有注册组件”

我认为问题在于 MVC 了解内核，但因为 WebAPI 使用它：

GlobalConfiguration.Configuration.DependencyResolver = new NinjectResolver(kernel);

所以它不知道内核。用于创建业务引擎的代码存在于与主 MVC、Web API 和 ninject 创建不同的项目中，如果可以的话，我不希望依赖 System.Web.Http（对于 GlobalConfiguration.Configuration.DependencyResolver 对象）帮助它。有什么方法可以让它同时在 MVC 和 WebAPI 上工作？

提前致谢

4

1 回答 1

0

我修复了这个问题，因此 IoC 将注入抽象工厂并在 MVC 和 WebAPI 中返回正确的具体实现。最后我的解决方案有以下软件包：

<package id="Ninject" version="3.0.1.10" targetFramework="net40" />
<package id="Ninject.Extensions.Wcf" version="3.0.0.5" targetFramework="net40" />
<package id="Ninject.MVC3" version="3.0.0.6" targetFramework="net40" />
<package id="Ninject.Web.Common" version="3.0.0.7" targetFramework="net40" />
<package id="Ninject.Web.WebApi-RC" version="3.0.0.22" targetFramework="net45" />

业务引擎工厂已修改为使用以下内容：

public class BusinessEngineFactory : IBusinessEngineFactory
{

    private IResolutionRoot resolutionRoot { get; set; }

    public BusinessEngineFactory(IResolutionRoot resolutionRoot)
    {
        this.resolutionRoot = resolutionRoot;
    }

    T IBusinessEngineFactory.GetBusinessEngine<T>()
    {
        return this.resolutionRoot.Get<T>();
    }
}

我尝试使用不起作用的包 Ninject.Web.WebApi 和 Ninject.Web.WeApi.Updated 阻止我的解决方案运行，并在应用程序启动时出现“调用目标引发异常”错误消息。回到旧版本是解决方案，所以现在一切正常。我什至检查了它也可以在 WCF 中使用！

于 2013-11-16T10:35:07.240 回答