Optional constructor injection arguments with .NET Core

Question

In some IoC containers it is possible to have arguments in the constructor that can't be fulfilled by the container. Is this possible with the Microsoft.Extensions.DependencyInjection libraries and IServiceProvider? If not, what is a clean solution for this sort of problem?

For example:

class InContainer
{
    public InContainer(NotInContainer dependency) { ... }
}

class Consumer
{
    public Consumer(IServiceProvider serviceProvider)
    {
         NotInContainer currentDependency = ... // from some other source
         // passing the anonymous object here is not supported, 
         // but I would like to 
         InContainer = serviceProvider.GetService<InContainer>(
             new { dependency = currentDependency }
         );
    }
}

Answer 1

Normally, I create a factory by hand in this case.

public class TheFactory
{
    public TheFactory( SomeType fromContainer )
    {
        _fromContainer = fromContainer;
    }

    public IProduct Create( SomeOtherType notFromContainer ) => new TheProduct( _fromContainer, notFromContainer );

    private readonly SomeType _fromContainer;

    private class TheProduct : IProduct
    {
        // ...
    }
}

If you need per-product dependencies from the container, the factory's Create has to resolve them. Or, in the case of e.g. unity, the factory gets a Func from the container.