FBA custom login page - membership provider returns “The method or operation is not implemented.”

Question

My SP web application use FBA authentication (AD and aspnetSQLmembership providers). I want log in to SP site from custom SP login page. In code-behind page (my class inherit FormsSignInPage(ns:Microsoft.SharePoint.IdentityModel.Pages)I wrote

MembershipUserCollection msc = Membership.FindUsersByEmail(someEmailString);
if (msc != null && msc.Count == 1)
{
foreach (MembershipUser user in msc)
{
userName = user.UserName;
}
FormsAuthentication.RedirectFromLoginPage(userName, false);
}

Problem: When debugger come to "MembershipUserCollection msc = Membership.FindUsersByEmail(someEmailString);" it breaks and I get message "Exception Details: System.NotImplementedException: The method or operation is not implemented.". Should I somewhere in code need to specify which membership provider should be used (AD od SQL) or what?!?

Please, any suggestion will be appreciated.

Answer 1

If you use multiple membershipproviders, check in your web.config which one is the default one (under the <membership> tag). If the SqlMembershipProvider isn't the default one, you could get the provider by using:

MembershipProvider oProv = Membership.Providers["<Providername>"];
oProv.FindUsersByEmail(someEmailString);
//and so on....

I've encountered this problem when using claims-based authentication, the default one was set on the claimsprovider, and if you use reflector to open up the dll that claims use, you'll see that most of the methods aren't implemented.

Answer 2

This is probably because you call the abstract class Membership instead of the specific implementation (SqlMembershipProvider).

Try using SqlMembershipProvider.FindUsersByEmail class instead.