public override bool select() { if (!isValid(new List<string> { "nsWidth", "nsHeight", "prID"})) return false; string sqlCommand = String.Format(@"select * from NetSize where nsID={0}", nsID); Sql sql = new Sql(); SqlDataReader reader = sql.selectNetSize(sqlCommand); if (!reader.HasRows) return false; initBySqlDataReader(reader); sql.closeConnection(); return true; }