How do you reuse actions amongst controllers, that inherit from another base class?

[Nefcanto]

Let's say we have a generic base class:

public class ListController<T> : Controller where T class, new()

Then we inherit two controllers from this ListController

public class CustomerController : ListController<Customer>

and

public class OrderController : ListController<Order>

Now let's say I have a common action, that can not be put inside the ListController. How do you share that action between these controllers without repeating yourself?

[markmouton22]

Hi :)

One way to share a common action between these controllers without repeating yourself is to use an interface or an abstract base class that defines this common action.

public interface ICommonAction
{
    ActionResult CommonAction();
}

public class CustomerController : ListController<Customer>, ICommonAction
{
    public ActionResult CommonAction()
    {
        // Implement the common action here
    }
}

public class OrderController : ListController<Order>, ICommonAction
{
    public ActionResult CommonAction()
    {
        // Implement the common action here
    }
}

In this way, both CustomerController and OrderController have the CommonAction method, and you can call it on any instance of these classes that you know implements ICommonAction.

[Nefcanto]

@markmouton22, that's not reusing. That's a contract. Maybe you can call the default methods a reuse. But that's also extremely limited, as it does not have access to HttpContext or it can not be used with class-level variables (instance variables). There is very little value in implementing contracts as a method of DRY and code reuse.