/// <summary>

        /// datatable转换xml

        /// </summary>

        /// <param name="xmlDS"></param>

        /// <returns></returns>

        public static string ConvertDataTableToXML(DataTable xmlDS)

        {

            StringBuilder strXml = new StringBuilder();

            strXml.AppendLine("<MonitorData>");

            for (int i = 0; i < xmlDS.Rows.Count; i++)

            {

                strXml.AppendLine("<" + xmlDS.TableName + ">");

                for (int j = 0; j < xmlDS.Columns.Count; j++)

                {

                    strXml.AppendLine("<" + xmlDS.Columns[j].ColumnName + ">" + xmlDS.Rows[i][j] + "</" + xmlDS.Columns[j].ColumnName + ">");

                }

                strXml.AppendLine("</" + xmlDS.TableName + ">");

            }

            strXml.AppendLine("</MonitorData>");

            return strXml.ToString();

        }