ASP.net自定义成员资格用户MembershipUser类

//
// OdbcMembershipProvider.CreateUser -- returns OdbcMembershipUser
//

public OdbcMembershipUser CreateUser(
         string username,
         string password,
         string email,
         string passwordQuestion,
         string passwordAnswer,
         bool isApproved,
         object providerUserKey,
         bool isSubscriber,
         string customerID,
         out MembershipCreateStatus status)
{
  ValidatePasswordEventArgs args =
    new ValidatePasswordEventArgs(username, password, true);

  OnValidatingPassword(args);
 
  if (args.Cancel)
  {
    status = MembershipCreateStatus.InvalidPassword;
    return null;
  }

  if (RequiresUniqueEmail && GetUserNameByEmail(email) != "")
  {
    status = MembershipCreateStatus.DuplicateEmail;
    return null;
  }

  MembershipUser u = GetUser(username, false);

  if (u == null)
  {
    DateTime createDate = DateTime.Now;

    if (providerUserKey == null)
    {
      providerUserKey = Guid.NewGuid();
    }
    else
    {
      if ( !(providerUserKey is Guid) )
      {
        status = MembershipCreateStatus.InvalidProviderUserKey;
        return null;
      }
    }

    OdbcConnection conn = new OdbcConnection(connectionString);
    OdbcCommand cmd = new OdbcCommand("INSERT INTO Users " +
          " (PKID, Username, Password, Email, PasswordQuestion, " +
          " PasswordAnswer, IsApproved," +
          " Comment, CreationDate, LastPasswordChangedDate, LastActivityDate," +
          " ApplicationName, IsLockedOut, LastLockedOutDate," +
          " FailedPasswordAttemptCount, FailedPasswordAttemptWindowStart, " +
          " FailedPasswordAnswerAttemptCount, FailedPasswordAnswerAttemptWindowStart, " +
          " IsSubscriber, CustomerID)" +