Ninject在MVC和WebAPI中創建抽象工廠

Question

我在C＃4.5項目中使用Ninject作為IoC容器。 我正在嘗試使用Ninject注入抽象工廠模式，該模式在MVC中可以正常工作，但在Web Api中卻不能。

我已安裝以下軟件：

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

我的工廠類如下：

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>();
    }
}

我有標准的NinjectWebCommon：

公共靜態類NinjectWebCommon {私有靜態只讀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>();
    }        
}

因此，這是在控制器中設置的

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);
    }
}

哪個工作正常。 我遇到問題的地方是WebAPIController中的相同代碼：

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;
    }

}

當我運行此命令時，MVC控制器可以正常運行，但是Web API函數無法正常運行，並且我收到了模糊的錯誤消息，該消息在調用webapi的構造函數中的任何代碼之前發生。

“加載Ninject組件ICache時出錯

尚未在內核的組件容器中注冊任何組件”

我認為問題在於MVC具有內核知識，但是因為WebAPI使用了此知識：

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

因此它不知道內核。 用於創建業務引擎的代碼與主要的MVC，Web API和ninject創建在一個不同的項目中，如果可以的話，我不希望對System.Web.Http（對於GlobalConfiguration.Configuration.DependencyResolver對象）保持依賴關系幫助它。 有什么方法可以使其同時在MVC和WebAPI中工作？

提前致謝

Answer 1

我已解決此問題，因此IoC將注入抽象工廠並在MVC和WebAPI中返回正確的具體實現。 最后，我的解決方案具有以下軟件包：

<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" />

將業務引擎工廠修改為使用以下內容：

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>();
    }
}

我嘗試使用無法運行的軟件包Ninject.Web.WebApi和Ninject.Web.WeApi.Updated，這導致我的解決方案無法運行，並在應用程序啟動時出現了“調用目標拋出異常”錯誤消息。 回到較舊的版本是解決方案，因此現在一切正常。 我什至還檢查了它在WCF中也能正常工作！