Question

I have an ASP.NET MVC 2 project. I ve decoupled layers. I have a service layer and a repository layer. The controller calls service methods and only the service layer calls methods in the repository.

The problem is: A method in my repository class uses LINQ joins. From this method, I would like to return a type with merging some data from joined tables. (i.e, Name = a.Name, Position = b.Position) And I always return IEnumerables in my repository class. So in this case, it seems I need to define a new type for (Name, Position), and return that type from the repository function. But, then, I ll have to remap that class to some other ViewModel class. (Because I m seperating concerns, I shouldnt use viewmodel classes in repository right?) This leads to many different classes. EF classes, classes for joined tables, and viewmodel classes.

我走的路对吗？

请开导我。

非常感谢。

Answer 1

考虑在存储库层定义这些类。从本质上讲，它们是DTO课程，听起来就像你在我本该走的轨道上。

为什么您希望将该类重新映射到其他ViewModel类？

public class EmpPosition()
{
    public property Name{get;set;}
    public property Position{get;set;}
}

//Repo
public IEnumerable<EmpPosition> GetEmployeePositions()
{}

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