asp.net mvc - Inject repository to custom membership provider with Ninject

Question

I'm trying to inject a repository to a custom membership provider with ninject in MVC 3.

In MembershipProvider I have tried the following:

[Inject]
public ICustomerRepository _customerRepository{ get; set; }

And

[Inject]
public TUMembershipProvider(ICustomerRepository customerRepository)
{
    _customerRepository = customerRepository;
}

In my ninject module i tried the following:

Bind<MembershipProvider>().ToConstant(Membership.Provider);

None of the above works.

When i use(in global.asa)

kernel.Inject(Membership.Provider);

together with

[Inject]
public ICustomerRepository _customerRepository{ get; set; }

it works, but i have no life cycle management and this will cause a "ISession is open" error from NHibernate, because the ISession is InRequestScope and the repository is not.

Answer 1

You could use the approach @Remo Gloor outlines in his blog post on provider injection. It involves 3 steps:

1. Add [Inject]s to any properties on your provider you need injected (although the pattern he shows -- creating a very simple class whose only function is to be a receptable for property injection and forwards any requests to a real class implemented using constructor injection -- is well worth following)

   public class MyMembershipProvider : SqlMembershipProvider
   {
       [Inject]
       public SpecialUserProvider SpecialUserProvider { get;set;}
       ...
   

2. Create an initializer wrapper that implements IHttpModule which pulls the provider in, triggering its creation:-

   public class ProviderInitializationHttpModule : IHttpModule
   {
       public ProviderInitializationHttpModule(MembershipProvider membershipProvider)
       {
       }
   ...
   

3. Register the IHttpModule in your RegisterServices :-

   kernel.Bind<IHttpModule>().To<ProviderInitializationHttpModule>();
   

4. there is no 4; Ninject does the rest - bootstrapping all registered IHttpModules including the one you added) during the startup sequence.

(Don't forget to read the comments on the blog post re lifetimes etc.)

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Finally, if you're looking for something completely braindead direct that solves it neatly, try this @Remo Gloor answer instead

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PS a great writeup on the whole mess is Provider is not a Pattern by @Mark Seemann. (and the oboligatory plug for his excellent book:- Dependency injection in .NET which will have you figuring this stuff out comfortably from first principles)