Unity equivalent for Ninject's Bind.ToMethod of IPrincipal,IIdentity

Question

I'm trying to replicate the following Ninject syntax in Unity, but not having any luck:

Bind<IIdentity>().ToMethod(c => HttpContext.Current.User.Identity);

I'm thinking it ought to look something like:

IUnityContainer container;
...
container.RegisterType<IIdentity>(HttpContext.Current.User.Identity);

How should it be?

score 11 · Accepted Answer · edited May 23 '17 at 12:09

11

While neontapir's answer could work, that extension method is Obsolete. The correct way to do this now would be to use an InjectionFactory:

container.RegisterType<IIdentity>(new InjectionFactory(u => HttpContext.Current.User.Identity));

edited May 23 '17 at 12:09

Community

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answered Nov 23 '11 at 18:01

BFree

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score 1 · Answer 2 · answered Nov 23 '11 at 17:50

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container.RegisterInstance<IIdentity>(...);

answered Nov 23 '11 at 17:50

Wiktor Zychla

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This wouldn't work as it would capture the current instance of User.Identity, and always return that. The OP wants the User.Identity to be **evaluated** every time the container is asked to resolve an IIdentity. – BFree Nov 23 '11 at 18:02
True. If the exact semantics is required then your answer is obviously closer to this. – Wiktor Zychla Nov 23 '11 at 18:05
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HttpContext.Current.User.Identity isn't available when the container is initialized, so yes wanted it to be evaluated each time. – Alfred Nov 23 '11 at 20:05
The key is you want: () => HttpContext.Current.User.Identity NOT HttpContext.Current.User.Identity – Tod Thomson Feb 13 '13 at 05:59

score 0 · Answer 3 · answered Nov 23 '11 at 17:56

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I believe a static factory extension would do it. I'm rusty on Unity. Seeman's Dependency Injection in .NET is a good resource for situations like this.

answered Nov 23 '11 at 17:56

neontapir

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Unity equivalent for Ninject's Bind.ToMethod of IPrincipal,IIdentity

3 Answers3