Getting the username inside a model class

I'm trying to implement basic auditing with some of my models (like CreatedAt, UpdatedAt, CreatedBy and UpdatedBy).

The date/time part is done. I'm throwing events on my models when a property is changed (implementing INotifyPropertyChanging, INotifyPropertyChanged) and can update the correspondent fields just fine.

I just need to know how to get the current user name without having to pass it through the controller every time I instantiate or get an existing instance of a model.

From stackoverflow

• Referencing System.Web and using HttpContext.Current.User.Identity.Name worked like a charm.

• Hi!

  Referencing System.Web and using HttpContext.Current.User.Identity.Name worked like a charm.

  I didn't know about it. Thanks. I do it like this:

  Membership.GetUser().UserName
  

  Which way is quicker?

  çağdaş : Considering User object is already populated in HttpContext, that should be quicker.

  changelog : Doesn't make a big difference, since this is a "mostly read" application.

• The abstract way of talking about identity is the "principal" - see this thread. I would hope that this code allows you to get the identity without having to know about the login implementation:

  public static class SomeUtilityClass {
      public static string GetUsername() {
          IPrincipal principal = Thread.CurrentPrincipal;
          IIdentity identity = principal == null ? null : principal.Identity;
          return identity == null ? null : identity.Name;
      }
  }
  ...
  
  record.UpdatedBy = record.CreatedBy = SomeUtilityClass.GetUsername();
  

  changelog : I don't want to keep specifying it, so it works better with a subscription to the event and doing it on the model itself. Thanks for the reference tho.