How to programatically change the login name of an SPUser

Question

I'm facing a problem with Sharepoint as I must change the Login name of my users. I'm in a claim based installation and I decide to use GUID as unique identifier.

By Sharepoint PowerShell I found how to do it and works.. How can I change it programmatically? LoginName properties seems to be read only!

Here's the way I rename it on Powershell:

Move-SPUser -Identity $User2 -NewAlias "i:05.t|saml provider|MYBASE65GUID==@DOMAIN.dom" -IgnoreSID

Anybody knows a way to do that programmatically in Sharepoint?

Thank you!

Answer 1

See the ISPUserMigrator interface.

Answer 2

To modify the login name of an User I used the SPFarm object.

The code looks simple like this:

 Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(delegate()
             {
                using (SPSite elevatedSite = new SPSite(url))
                {
                    using (SPWeb web = elevatedSite.OpenWeb())
                    {
                    foreach (Principal user in ps.FindAll()) //Searches the user in LDAP
                    {
                        if (user.UserPrincipalName == EmailUser)
                        {
                             var BASE64 = System.Convert.ToBase64String((user.Guid.Value).ToByteArray()); //Convert the guid in BASE64
                            SPUser mi = web.EnsureUser("i:05.t|saml provider|"+EmailUser); //get the user I want to change
                            SPFarm farm = SPFarm.Local; //get the local farm
                            farm.MigrateUserAccount(mi.LoginName, "i:05.t|saml provider|" + BASE64 + "@fakemail.dom", false);
                            break;
                        }
                    }
                    }
                }
            });

In this way the user has a new LoginName as I wanted.

Answer 3

SPWeb.EnsureUser(loginName)

This will create the user within SharePoint if it doesn't already exist (i.e. the user should be allowed access but hasn't actually visited the site).