Question

I am using the default ASP.NET MVC Membership Provider and I would like to allow user’s to modify their email after they have created their account. I do not want users to be able to use a duplicate email.

How do I allow a user to modify their email and check that the email is not in use elsewhere in the database? I am not sure of the best way to do this type of check when using the default Membership Provider.

note – I know the Membership Provider itself performs this check when a user attempts to register their email address, I do not know how to perform this check at a later time (due to noobness).

note 2 – I only know of this method of accessing the user’s email, is this the proper way to be accessing it?

MembershipUser useremail = Membership.GetUser(User.Identity.Name);
ViewBag.Email = useremail.Email;

Answer 1

You can search for an existing username by that email:

String userName = MembershipProvider.GetUserNameByEmail(email)

If no match is found, userName will be null. See here for more info on this.

Also, if your MembershipProvider has RequiresUniqueEmail = true then this check should already be performed for you – as per this page.