public List<Maker> GetMakerList()
        {
            IDAL dal = GetDAL();
            string query = "SELECT * FROM Gyartok", error = string.Empty;
            SqlDataReader rdr = dal.ExecuteReader(query, ref error);

            List<Maker> makerList = null;
            if (error == "OK")
            {
                makerList = new List<Maker>();
                while (rdr.Read())
                {
                    Maker m = new Maker();
                    m.MakerID = Convert.ToInt32(rdr[0]);
                    m.CountryID = Convert.ToInt32(rdr[1]);
                    m.MakerName = rdr[2].ToString();
                    m.MakerFoundYear = Convert.ToInt32(rdr[3]);
                    makerList.Add(m);
                }
            }
            dal.CloseDataReader(rdr);

            return makerList;
        }