c# – 构造函数参数不存在时的异常

概述我试图通过使用Unity将基于接口的两个对象注入到类构造函数中. 单元测试时我当前收到以下错误： Result Message: Test method TestProject.TFStests.Check_Interface_CheckOut_Method threw exception: System.InvalidOperationException: The type Adp.Tools. 我试图通过使用Unity将基于接口的两个对象注入到类构造函数中.

单元测试时我当前收到以下错误：

Result Message:
Test method TestProject.TFStests.Check_Interface_CheckOut_Method threw exception:
system.invalIDOperationException: The type Adp.Tools.VersionControl.TfsversionControl.TfsVcPromotionManager does not have a constructor that takes the parameters (TfsVcQaCheckoutWorker).

以下代码是我的Unity类,用于注册和解析TfsVCPromotionManager对象：

public class UnityClass{    public static ITfsVcPromotionManager returnNewPromotionManager(       VersionControlServer tfServer)    {        var container = new UnityContainer();        ITfsVcQaCheckinWorker test1 = CreateUnityCheckInWorker();        ITfsVcQaCheckoutWorker test2 = CreateUnityCheckOutWorker(tfServer);        container.RegisterType<ITfsVcPromotionManager,TfsVcPromotionManager>(            new InjectionConstructor(test2),new InjectionConstructor(test1));        return container.Resolve<TfsVcPromotionManager>();    }    private static ITfsVcQaCheckinWorker CreateUnityCheckInWorker()    {        var container = new UnityContainer();        container.RegisterType<ITfsVcQaCheckinWorker,ITfsVcQaCheckinWorker>();        return container.Resolve<TfsVcQaCheckinWorker>();    }    private static ITfsVcQaCheckoutWorker CreateUnityCheckOutWorker(        VersionControlServer passedServer)    {        var container = new UnityContainer();        container.RegisterType<ITfsVcQaCheckoutWorker,TfsVcQaCheckoutWorker>(            new InjectionConstructor(passedServer));        return container.Resolve<TfsVcQaCheckoutWorker>();    }}

这是TfsVcPromotionManager类的构造函数.请注意,它明确地接受了基于ITfsVcQaCheckoutworker和ITfsVcCheckinWorker接口的实例.

private ITfsVcQaCheckoutWorker _checkOutWorker;    private ITfsVcQaCheckinWorker _checkInWorker;    public TfsVcPromotionManager(ITfsVcQaCheckoutWorker checkOutWorker,ITfsVcQaCheckinWorker checkInWorker)    {        if (checkOutWorker == null || checkInWorker == null)        {            throw new NullReferenceException();        }        _checkOutWorker = checkOutWorker;        _checkInWorker = checkInWorker;    }

任何人都可以告诉我我做错了什么.

解决方法 它说它找不到“带参数的构造函数(TfsVcQaCheckoutWorker)”,这确实是一个真实的陈述.没有构造函数只接受一个参数.我对Unity并不熟悉,但我打赌你的问题可以通过改变这个来解决：

container.RegisterType<ITfsVcPromotionManager,TfsVcPromotionManager>(    new InjectionConstructor(test2),new InjectionConstructor(test1))

对此：

container.RegisterType<ITfsVcPromotionManager,TfsVcPromotionManager>(    new InjectionConstructor(test2,test1))

有关InjectionConstructor的constructor,请参阅MSDN参考.

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