No entiendo que pasa con estas consultas [MySql + C#]

[jhonwilliams]

Buenas compañeros

tengo el siguiente caso Insert , este código funciona perfectamente:

Código:

 MySqlConnection cn = new MySqlConnection(.GetStrigConnection());

            using (cn)
            {
                try
                {
                    cn.Open();
                    MySqlParameter pIdOwner = new MySqlParameter("@ID_OWNER", MySqlDbType.String, 40) { Value = id_owner };
                    MySqlParameter pCodeOwner = new MySqlParameter("@COD_OWNER", MySqlDbType.String, 20) { Value = cod_owner};
                    MySqlParameter pName = new MySqlParameter("@NAME", MySqlDbType.String, 80) { Value = name };
                    MySqlParameter pTelephone = new MySqlParameter("@TELEPHONE", MySqlDbType.String, 45) { Value = telephone };
                    MySqlParameter pCellPhone = new MySqlParameter("@CELLPHONE", MySqlDbType.String, 45) { Value = cellphone };
                    MySqlParameter pAddress = new MySqlParameter("@ADDRESS", MySqlDbType.String, 80) { Value = address };
                    MySqlParameter pMail = new MySqlParameter("@MAIL", MySqlDbType.String, 80) { Value = mail};

                    query = "INSERT INTO tblowners " +
                        "(ID_OWNER, " +
                        "COD_OWNER, " +
                        "NAME, " +
                        "TELEPHONE, " +
                        "CELLPHONE, " +
                        "ADDRESS, " +
                        "MAIL) " +
                        "VALUES " +
                        "( " +
                        "@ID_OWNER, " +
                        "@COD_OWNER, " +
                        "@NAME, " +
                        "@TELEPHONE, " +
                        "@CELLPHONE, " +
                        "@ADDRESS, " +
                        "@MAIL " +
                        ") ";

                    MySqlCommand cmd = new MySqlCommand(query, cn);
                    cmd.Parameters.Add(pIdOwner);
                    cmd.Parameters.Add(pCodeOwner);
                    cmd.Parameters.Add(pName);
                    cmd.Parameters.Add(pTelephone);
                    cmd.Parameters.Add(pCellPhone);
                    cmd.Parameters.Add(pAddress);
                    cmd.Parameters.Add(pMail);

                    result = cmd.ExecuteNonQuery();

                }
                catch (Exception ex)
                {
                    Common.CallException(ex);
                }
                finally
                {
                    cn.Close();
                }

Trato de usar la misma estructura en este bloque Update, pero no funciona por mas que miro y reviso el código yo lo veo bn

Código:

 MySqlConnection cn = new MySqlConnection(GetStrigConnection());

            using (cn)
            {
                try
                {
                    cn.Open();
                    
                    MySqlParameter pName = new MySqlParameter("@NAME", MySqlDbType.String, 80) { Value = name };
                    MySqlParameter pTelephone = new MySqlParameter("@TELEPHONE", MySqlDbType.String, 45) { Value = telephone };
                    MySqlParameter pCellPhone = new MySqlParameter("@CELLPHONE", MySqlDbType.String, 45) { Value = cellphone };
                    MySqlParameter pAddress = new MySqlParameter("@ADDRESS", MySqlDbType.String, 80) { Value = address };
                    MySqlParameter pMail = new MySqlParameter("@MAIL", MySqlDbType.String, 80) { Value = mail };
                    MySqlParameter pIdOwner = new MySqlParameter("@ID_OWNER", MySqlDbType.String, 40) { Value = id_owner };

                    query = "UPDATE tblowners "+
                        "SET " +
                        "NAME = '@NAME', " +
                        "TELEPHONE = '@TELEPHONE', " +
                        "CELLPHONE = '@CELLPHONE', " +
                        "ADDRESS = '@ADDRESS', " +
                        "MAIL =  '@MAIL'" +
                        "WHERE ID_OWNER = '@ID_OWNER' ";

                    MySqlCommand cmd = new MySqlCommand(query, cn);
                    cmd.Parameters.Add(pName);
                    cmd.Parameters.Add(pTelephone);
                    cmd.Parameters.Add(pCellPhone);
                    cmd.Parameters.Add(pAddress);
                    cmd.Parameters.Add(pMail);
                    cmd.Parameters.Add(pIdOwner);

                    result = cmd.ExecuteNonQuery();

                }
                catch (Exception ex)
                {
                    Common.CallException(ex);
                }
                finally
                {
                    cn.Close();
                }
            }

Algo muy similar me paso con este Select:

Código:

   MySqlConnection cn = new MySqlConnection(new Regedit().GetStrigConnection());

            using (cn)
            {
                try
                {
                    cn.Open();

                    query = string.Format("SELECT " +
                        "tblusers.ID_USER, " +
                        "tblusers.USERNAME, " +
                        "tblusers.NAME, " +
                        "tblusers.USERPASS,  " +
                        "tblusers.MAIL,  " +
                        "tblusers.PERMISSIONS " +
                        "FROM tblusers " +
                        "WHERE tblusers.USERNAME = '{0}' " +
                        "AND tblusers.USERPASS = '{1}' ", user,password);

                    MySqlCommand cmd = new MySqlCommand(query, cn);
                    MySqlDataAdapter adap = new MySqlDataAdapter(cmd);

                    DataTable table = new DataTable("tblUsers");

                    adap.Fill(table);

                    if (table.Rows.Count > 0)
                        result = true;
                    else
                        result = false;
                }
                catch (Exception ex)
                {
                    Common.CallException(ex);
                }
                finally
                {
                    cn.Close();
                }

A fin de cuentas no me funciono con los MySqlParameters y opte por armar la cadena de query con el string.format, pero me gustaría hacerla con los MySqlParameter, para tener una estructura uniforme en las consultas a la base de datos.

Gracias