ASP.NET 5 MVC with EF controllers using services

Question

I'm new to the ASP.NET 5 MVC with Entity Framework. This is probably a simple problem, but I can't find a tutorial for this online, or I don't know how to search for it. So here's my problem.

I've took the task of finishing a simple project. Here's how the solution looks like:

Task says that there's this code-first approach, hence the Data, Entity, and Services libraries.

• Data - provides the DataContext
• Entity - provides objects (C# classes that represent DB tables)
• Services - provide CRUD and other functions for each entity

How do you call service for object A from controller for object B without using the DataContext class?

All tutorials I've seen don't even use services. Each of their controllers use the DataContext instance. If I used DataContext in my controller for object BI would render services library useless. I know I can, but the goal is to use the services.

It might go without saying for me, but just to be clear: services library has 2 interfaces and 2 classes that implement the two interfaces, one pair of interface-class is for object A and the other is for object B. So: IServiceA, ServiceA, IServiceB, ServiceB.

The reason I need ServiceA to call from ControllerB is because B contains an instance of A, thus for my practice I need to list all As in a view dedicated to B.

Answer 1

I just checked and saw that each of the services is using the DataContext, so I could have just added a new function there and continue using the service in the controller.

Silly silly me.