How to get SPUser from FBA login name

Question

I have a Form Based Authentication login name login_name

how to get an SPUser object for that login name.

I have tried the

Web.EnsureUser(string.Format("c:0-.f|role|{0}", name));

but it gives me that the name was not found exception.

Answer 1

Checks whether the specified login name belongs to a valid user of the Web site, and if the login name does not already exist, adds it to the Web site.

    SPUser newUser = SPContext.Current.Web.EnsureUser(@"domain\logonname");