……
            conn.Open();
            SqlCommand comm = new SqlCommand();
            comm.CommandText = "Select top 500 voicefile FROM GSMVoiceInfo WHERE (tPhone = '14444440') AND (LEN(VoiceFileName) > 0)";
            comm.CommandTimeout = 300;
            comm.Connection = conn;

            SqlDataReader dr;
            dr = comm.ExecuteReader();
            int i = 0;
            while (dr.Read())
            {
                //i++;
                this.dataGridView1.Rows.Add(new ListViewItem(dr.GetString(dr.GetOrdinal("voicefile "))));
            }
            conn.Close();