StringBuilder cmdStr = new StringBuilder();
                            cmdStr.AppendFormat("UPDATE poplugin_data SET username='{0}', ", username);
                            foreach(string key in idict.Keys)
                            {
                                cmdStr.AppendFormat("{0}='{1}', ", key, idict[key]);
                            }
                            cmdStr.Remove(cmdStr.Length - 2, 2);
                            cmdStr.AppendFormat(" WHERE id={0}", Int32.Parse(id));

                            cmd.CommandText = cmdStr.ToString();