Question

I use autofac and can pass parameters to my resolve method.

How can I do this using microsofts DependencyResolver interface?

Answer 1

The IDependencyResolver does not support passing parameters directly, as I’m sure you have noticed. However, since you have Autofac under the hood, you’re able to resolve a factory delegate that enables you to pass on parameters to the underlying service:

var factory = dependencyResolver.GetService<Func<int, string, IService>>();
var service = factory(5, "42");

Note: you can either use Func delegates or explicitly defined factory delegates. More on this here.

Regarding lifetime scopes: factory delegates must be resolved from a scope where the requested service can be “reached”. Consider this setup simulating how MVC or WebApi would look like:

var cb = new ContainerBuilder();
cb.RegisterType<X>().InstancePerMatchingLifetimeScope("http");
var application = cb.Build();
var request = application.BeginLifetimeScope("http");

With this setup, our X service will only be available in the http scope. Trying to resolve X from application scope will fail with this message:

No scope with a Tag matching ‘http’ is visible from the scope
in which the instance was requested.

Resolving from the request scope will work as expected:

var f = request.Resolve<Func<IX>>();
var x = f();