如何用存储库模式问题解决这个泛型？

Question

我从前一个问题获得了此代码,但它没有编译:

    public interface IEntity
{     
// Common to all Data Objects
}
public interface ICustomer : IEntity
{
     // Specific data for a customer
}
public interface IRepository<T, TID> : IDisposable where T : IEntity
{
     T Get(TID key);
     IList<T> GetAll();
     void Save (T entity);
     T Update (T entity);
     // Common data will be added here
}
public class Repository<T, TID> : IRepository
{
     // Implementation of the generic repository
}
public interface ICustomerRepository
{
     // Specific operations for the customers repository
}
public class CustomerRepository : Repository<ICustomer>, ICustomerRepository
{
     // Implementation of the specific customers repository
}

但是在这两行中:

1-公共类存储库:IRepository

2-公共类CustomerRepository:Repository,ICustomerRepository

它给了我这个错误:使用泛型类型'TestApplication1.IRepository'需要'2'类型参数

你能帮我解决一下吗？

Answer 1

从Repository/IRepository继承时,需要使用两个类型参数,因为它们采用两个类型参数.也就是说,当您从IRepository继承时,您需要指定以下内容:

public class Repository<T, TID> : IRepository<T,TID> where T:IEntity

和

public class CustomerRepository : Repository<ICustomer,int>,ICustomerRepository

编辑为Reposistory的实现添加类型约束