传递类的接口会引发错误，但仅传递类可以正常工作

发布于 2024-10-31 22:26:23 字数 1293 浏览 2 评论 0原文

我有两个类：

DefectsController

public abstract class DefectsController<TDefect, TDefectService> :
    ApplicationController<DefectsController<TDefect, TDefectService>, TDefect>
    where TDefectService : IEntityService<TDefect>
    where TDefect : Defect
{
    private readonly TDefectService defectService;


    public DefectsController(TDefectService defectService)
        : base(defectService)
    {
        this.defectService = defectService;
    }
}

和 JobDefectsController （还有其他部分，这些只是示例）

public class JobDefectsController : DefectsController<JobDefect, IEntityService<JobDefect>>
{
    public JobDefectsController(EntityService<JobDefect> service)
        : base(service)
    {
    }
}

出于某种原因，如果我将 JobDefectsController 的构造函数更改为使用 IEntityService，那么如果我尝试访问 DefectsController 中的 defectService它会抛出未知错误。

编辑：此错误：提供的泛型参数数量不等于泛型类型定义的数量。
参数名称：实例化

曾经有一个名为 JobDefectsService 的类，它继承自 IEntityService，其接口 (IJobDefectService) 可以是用于代替 IEntityService 和 EntityService 没有问题。

任何人都知道问题可能是什么？

谢谢，
哈罗德

原文

I have two classes:

DefectsController

public abstract class DefectsController<TDefect, TDefectService> :
    ApplicationController<DefectsController<TDefect, TDefectService>, TDefect>
    where TDefectService : IEntityService<TDefect>
    where TDefect : Defect
{
    private readonly TDefectService defectService;


    public DefectsController(TDefectService defectService)
        : base(defectService)
    {
        this.defectService = defectService;
    }
}

and JobDefectsController (there are other parts as well, these are just examples)

public class JobDefectsController : DefectsController<JobDefect, IEntityService<JobDefect>>
{
    public JobDefectsController(EntityService<JobDefect> service)
        : base(service)
    {
    }
}

For some reason if I change JobDefectsController's constructor to using IEntityService instead then if I try to access defectService in the DefectsController it throws unknown errors.

Edit: This error: The number of generic arguments provided doesn't equal the arity of the generic type definition.
Parameter name: instantiation

There used to be a class called JobDefectsService which inherited from IEntityService<JobDefect> and the interface of that (IJobDefectService) could be used in place of both IEntityService<JobDefect> and EntityService<JobDefect> without problems.

Anyone have any clue to what the problem could be?

Thanks,
Harold

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

旧时模样 2024-11-07 22:26:23

您的构造函数参数和第二个类参数必须是相同的类型。即 TDefectService 。

如果你想使用接口，那么你的具体类应该定义如下...

public class JobDefectsController : DefectsController<JobDefect, IEntityService<JobDefect>>
{
    public JobDefectsController(IEntityService<JobDefect> service)
        : base(service)
    {
    }
}

要使用具体类，那么你需要这样做...

public class JobDefectsController : DefectsController<JobDefect, EntityService<JobDefect>>
{
    public JobDefectsController(EntityService<JobDefect> service)
        : base(service)
    {
    }
}

Your constructor parameter and your second class parameter need to be the same type. I.e. TDefectService .

If you want to use the interface then your concrete class should be defined as follows...

public class JobDefectsController : DefectsController<JobDefect, IEntityService<JobDefect>>
{
    public JobDefectsController(IEntityService<JobDefect> service)
        : base(service)
    {
    }
}

To use the concrete class then you need to do this...

public class JobDefectsController : DefectsController<JobDefect, EntityService<JobDefect>>
{
    public JobDefectsController(EntityService<JobDefect> service)
        : base(service)
    {
    }
}

回复收藏 0 原文