Question

I’m trying to use Ninject to provide my custom MembershipProvider with an instance of the (default) AspNetSqlMembershipProvider:

Bind<IMembershipService>()
  .To<MembershipService>()
  .WithConstructorArgument("provider", System.Web.Security.Membership.Provider));

I’m instantiating my Ninject module using the standard MVC3 pattern in the App_Start, specifically I am invoking the static Start() method using the WebActivator

[assembly: WebActivator.PreApplicationStartMethod(typeof(MyProject.App_Start.NinjectMVC3), "Start")]

public static void Start()
{
    DynamicModuleUtility.RegisterModule(typeof(OnePerRequestModule));
    bootstrapper.Initialize(CreateKernel);
}

The problem I have is that at this point, the default System.Web.Security.Membership.Provider as not been established and the application errors on start-up.

To get over this problem, I have restructured the code by adding a WebActivator.PostApplicationStartMethod:

[assembly: WebActivator.PreApplicationStartMethod(typeof(MyProject.App_Start.NinjectMVC3), "Start")]
[assembly: WebActivator.PostApplicationStartMethod(typeof(MyProject.App_Start.NinjectMVC3), "PostStart")]

public static void Start()
{
    DynamicModuleUtility.RegisterModule(typeof(OnePerRequestModule));
}

and moving the bootstrapperInitialze() call into a PostStart() method:

public static void PostStart()
{
    bootstrapper.Initialize(CreateKernel);
}

This resolves the problem, but I was wondering if a) this is likely to introduce other problems, or b) if there was an alternative approach?

ADDITIONAL DETAILS:
I have tried modifying the bindings as suggested, but I get the following compilation error:

‘Ninject.Syntax.BindingRoot.Bind()’ is a ‘method’, which is not valid in the given context

For information, here is the listing for my MembershipModule:

public class MembershipModule : NinjectModule
{
  public override void Load()
  {
     // Membership Service
     Bind<Abl.Mvc.Models.Membership.Abstract.IMembershipService>()
       .To<Abl.Mvc.Models.Membership.Services.MembershipService>()
       .WithConstructorArgument("provider", System.Web.Security.Membership.Provider)
       .WithConstructorArgument("connectionString", MembershipProvider.GetConnectionString());

     // This line errors
     Bind<MembershipProvider>.ToMethod(ctx => System.Web.Security.Membership.Provider);
  }
}

Thank you for your help.

Answer 1

Change your bindings to:

Bind<IMembershipService>().To<MembershipService>();
Bind<MembershipProvider>().ToMethod(ctx => Membership.Provider);