ASP.NET Membership: Where is Current User ID Stored?

Question

Using ASP.NET membership, if I want to get information for the current user, I can call MembershipUser.GetUser()

So, somehow the system must know the ID of the current user.

If this is correct, and all I want is the ID of the current user, is there a way to get it without returning all the user information from the database?

I know I can get the username of the current user using User.Identity.Name, but I need the ID.

Answer 1

The short answer is no you can't get only userID without retrieve whole user info when you use built-in membership provider, only by this

    MembershipUser user = Membership.GetUser();
    string UserID = user.ProviderUserKey.ToString();

But if you want to have method or property which retrieve only userID, you must re-implement your own membership provider or(it's simply) to implement IPrincipal interface