Identifiers - mariaheine/Zenject-But-Wiki GitHub Wiki

You can also give an ID to your binding if you need to have distinct bindings for the same type, and you don't want it to just result in a List<>. For example:

// Installer
Container.Bind<IFoo>().WithId("foo").To<Foo1>().AsSingle();
Container.Bind<IFoo>().To<Foo2>().AsSingle();

// User
public class Bar1
{
    [Inject(Id = "foo")]
    IFoo _foo;
}

public class Bar2
{
    [Inject]
    IFoo _foo;
}

In this example, the Bar1 class will be given an instance of Foo1, and the Bar2 class will use the default version of IFoo which is bound to Foo2.

Note also that you can do the same thing for constructor/inject-method arguments as well:

public class Bar
{
    Foo _foo;

    public Bar(
        [Inject(Id = "foo")]
        Foo foo)
    {
    }
}

In many cases, the ID is created as a string, however you can actually use any type you like for this. For example, it's sometimes useful to use an enum instead:

enum Cameras
{
    Main,
    Player,
}

Container.Bind<Camera>().WithId(Cameras.Main).FromInstance(MyMainCamera);
Container.Bind<Camera>().WithId(Cameras.Player).FromInstance(MyPlayerCamera);

You can also use custom types, as long as they implement the Equals operator.