ASP.net自定义成员资格用户MembershipUser类

//
// GetUserFromReader
//    A helper function that takes the current row from the OdbcDataReader
// and hydrates a MembershipUser from the values. Called by the
// MembershipUser.GetUser implementation.
//

private OdbcMembershipUser GetUserFromReader(OdbcDataReader reader)
{
  object providerUserKey = reader.GetValue(0);
  string username = reader.GetString(1);
  string email = reader.GetString(2);

  string passwordQuestion = "";
  if (reader.GetValue(3) != DBNull.Value)
    passwordQuestion = reader.GetString(3);

  string comment = "";
  if (reader.GetValue(4) != DBNull.Value)
    comment = reader.GetString(4);

  bool isApproved = reader.GetBoolean(5);
  bool isLockedOut = reader.GetBoolean(6);
  DateTime creationDate = reader.GetDateTime(7);

  DateTime lastLoginDate = new DateTime();
  if (reader.GetValue(8) != DBNull.Value)
    lastLoginDate = reader.GetDateTime(8);

  DateTime lastActivityDate = reader.GetDateTime(9);
  DateTime lastPasswordChangedDate = reader.GetDateTime(10);

  DateTime lastLockedOutDate = new DateTime();
  if (reader.GetValue(11) != DBNull.Value)
    lastLockedOutDate = reader.GetDateTime(11);

  bool isSubscriber = false;
  if (reader.GetValue(12) != DBNull.Value)
    isSubscriber = reader.GetBoolean(12);

  string customerID = String.Empty;
  if (reader.GetValue(13) != DBNull.Value)
    customerID = reader.GetString(13);       
 
  OdbcMembershipUser u = new OdbcMembershipUser(this.Name,
                                        username,
                                        providerUserKey,
                                        email,
                                        passwordQuestion,
                                        comment,
                   &n