MVC3 + Ninject: What is the proper way to inject the User IPrincipal?

Question

I have seen the following two example for injecting the User IPrincipal:

Method 1:

kernel.Bind<IPrincipal>()
   .ToMethod(context => context.Kernel.Get<RequestContext>().HttpContext.User)
   .InRequestScope();

Method 2:

kernel.Bind<IPrincipal>()
  .ToMethod(context => HttpContext.Current.User)
  .InRequestScope();

Is there any difference in the two? Is one preferred?

Skiing

How can I accomplish the above using Autofac? – Competitor

Found my answer #2825149 – Competitor

you'll need using Ninject.Web.Common for InRequestScope extension method – Calculate

When I try to do these method 1 throws a null exception and method 2 gives me an empty IPrincipal, any idea why it wouldn't be working correctly? – Eurythmic

Answer 1

The two methods are identical. Both are going to return the HttpContext obect for the current HTTP Request.

Apocalyptic

If that's the case, I'm obviously going to choose the more concise option. Any idea why all the trouble of "context.Kernel.Get" in Method 1? – Skiing

The first example would be needed if the context you were using was of another type of ContextProvider. Since your using the HttpContext provider globally available via System.Web, there is no need for the first. – Apocalyptic