How do I access the autofac container in ASP.NET MVC3 controller?

Question

I would like to resolve a dependency using a named parameter in an MVC controller. If I can access the Autofac container I should be able to do it like so:

var service = Container.Resolve<IService>(
    new NamedParameter("fileExtension", dupExt)
);

I can't find out how to access the AutoFac container. Is there a global reference to the container that I can use or is there another way to use named parameters?

score 33 · Accepted Answer · edited May 23 '17 at 12:34

33

I've just discovered I can use IComponentContext for the same thing. You can inject an instance of IComponentContext into the controller.

public class MyController : Controller
{
    private readonly IComponentContext _icoContext;

    public void MyController(IComponentContext icoContext)
    {
        _icoContext= icoContext;
    }

    public ActionResult Index()
    {
        var service = _icoContext.Resolve<IService>(
            new NamedParameter("ext", "txt")
        );
    }
}

I've found some good advice on getting global access to the container in this question: Autofac in web applications, where should I store the container for easy access?

I've also found how to get access to the dependency resolver globally here: Global access to autofac dependency resolver in ASP.NET MVC3?

edited May 23 '17 at 12:34

Community

1
1

answered Oct 20 '11 at 15:16

Richard Garside

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You should't do that. It's a bad practice. Instead of service locator approach it's better to do constructor injection. Simply inject IService to the constructor and use the injected instace as a class fiel – Wojteq Oct 20 '11 at 15:19
1

How can I use named parameters with that approach? – Richard Garside Oct 20 '11 at 15:23
2

You can get something similar using Factory delegate: http://code.google.com/p/autofac/wiki/DelegateFactories – Wojteq Oct 20 '11 at 15:25

score 11 · Answer 2 · edited Nov 18 '11 at 01:38

11

AutofacDependencyResolver.Current.ApplicationContainer

.Resolve

.ResolveNamed

.ResolveKeyed

.....

edited Nov 18 '11 at 01:38

chown

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answered Nov 01 '11 at 02:46

chenZ

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15

You might want to flesh out your response a bit. Just posting a few names is not that helpful for most people. – Joris Meys Nov 01 '11 at 20:12
4

I think his answer is actually helping. I got my problem resolved with this answer. – Wei Ma Dec 14 '14 at 18:52
Well, I did not. I think this answer should be improved. – PaulG Jan 13 '21 at 04:35

How do I access the autofac container in ASP.NET MVC3 controller?

2 Answers2