Call multiple classes with the same interface

Question

I have an interface like

public interface IAddressProvider
{
    string GetAddress(double lat, double long);
}

In my consuming class I wan

Answer 1

Could you not just use container.GetAllInstances?, like so:

var address = new List();
foreach (var provider in container.GetAllInstances())
{
    address.add(provider.GetAddress(lat, long));
}

Edit:

I see what you mean now. If you're using StructureMap 2.x then I would recommend looking at the Conditionally clause. However this has been removed in version 3 in favour of creating your own builder class that should be responsible for returning the correct instance.

For example:

public class AddressProviderBuilder : IInstanceBuilder
{
    private readonly IContainer container;

    public AddressProviderBuilder(IContainer container)
    {
        this.container = container;
    }

    public IAddressProvider Build()
    {
        foreach (var provider in this.container.GetAllInstances())
        {
            if (provider.GetAddress(lat, long) != null)
            {
                return provider;
            }
        }

        return null;
    }
}