Using Open Generics with Funq

Question

I have the following interface:

public interface IWriter<in TId, TViewModel>

Why there are many different implementations, such as:

public class RedisWriter<TId, TViewModel> : IWriter<TId, TViewModel> 

I would like to add an instance of this class to the service constructor:

public class MyService : Service
{
    private readonly IWriter<Guid, OrderViewModel> _writer;

    public MyService(IWriter<Guid, OrderViewModel> writer)
    {
        _writer = writer;
    }
}

Note that type type parameters are closed where the instance is required.

I see no way to do this in Funq. Is it possible? Or do other IOCs allow such use?

Answer 1

Funq does not support the creation of private implementations based on open generic registrations. With Funq, you have to explicitly register all closed shared implementations that applications require. For instance:

c.Register<IWriter<Guid, OrderViewModel>>(c => new RedisWriter<Guid, OrderViewModel>());
c.Register<IWriter<int, UserViewModel>>(c => new RedisWriter<int, UserViewModel>());

?

, DI , , Simple Injector, Autofac, Castle Windsor, Ninject StructureMap.