Question

我使用城堡windsor进行依赖注入并尝试注入一些通用类型。但是，当我在我的容器上调用resolve时，我收到以下错误 -

类并不满足实现类型的泛型约束。

我在此示例中暂时传递了一个简单的Car类型。

public class CreateRequestInstance<T> where T : class, ICreateRequestInstance<T>
{
    private IRequestObject<T> _IRequestObject;

    public CreateRequestInstance(IRequestObject<T> requestObject)
    {
        this._IRequestObject = requestObject;
    }

    public TReturn CreateRequest<TReturn>(string provider, string type, string token, T request,
        string revision, string errorCode, string errorMessage)
    {
        _IRequestObject.Provider = provider;
        _IRequestObject.Type = type;
        _IRequestObject.Token = token;
        _IRequestObject.Request = request;
        _IRequestObject.ErrorCode = errorCode;
        _IRequestObject.ErrorMessage = errorMessage;

        return (TReturn)Convert.ChangeType(_IRequestObject, typeof(IRequestObject<T>));
    }  
}

这是我的安装程序

public void Install(IWindsorContainer container, IConfigurationStore store)
{
    container
        .Register(Component
            .For(typeof(ICreateRequestInstance<>))
            .ImplementedBy(typeof(CreateRequestInstance<>))
            .LifestyleTransient())
         .Register(Component
            .For(typeof(ICreateResponseInstance<>))
            .ImplementedBy(typeof(CreateResponseInstance<>))
            .LifestyleTransient())
        .Register(Component
            .For(typeof(IRequestObject<>))
            .ImplementedBy(typeof(RequestObject<>))
            .LifestyleTransient())
        .Register(Component
            .For(typeof(IResponseObject<>))
            .ImplementedBy(typeof(ResponseObject<>))
            .LifestyleTransient());
}

这是我的班级工厂电话

public T GetConcreteClass<T>()
{
    var someClass = container.Resolve<T>();
    return someClass;
}

这是调用代码

var t = factory.GetConcreteClass<ICreateRequestInstance<ICar>>();

var test = t.CreateRequest<ICar>("provide", "test", "test", car, "1", "this is a test", "fred");

对此有任何帮助将不胜感激

Answer 1

public class CreateRequestInstance<T> where T : class, ICreateRequestInstance<T>

看起来并不正确。您正在声明一个需要模板参数的类，该模板参数是实现ICreateRequestInstance<T>的类。有了这个，除非你的Car类型实现ICreateRequestInstance<T>（我怀疑它），否则你会收到错误。

我认为你真的打算：

public class CreateRequestInstance<T> : ICreateRequestInstance<T> where T : class

这是一个实现ICreateRequestInstance<T>的类，它需要一个任何类的模板参数。

Castle windsor - Car不满足实现类型的通用约束

1 个答案: