#region XML转dataset        //str 是xml字符串        public static DataTable GetResultXMLToDataTable    (string str,string Dt_Name)        {            DataSet xmlDs = new DataSet("ds");            StringReader stream = null;            XmlTextReader reader = null;            try            {                using (stream = new StringReader(str))                {                    using (reader = new XmlTextReader(stream))                    {                        xmlDs.ReadXml(reader);                        return xmlDs.Tables[Dt_Name];                    }                }            }            catch (Exception ex)            {               //Get Exception            }            finally            {                if (reader != null)                    reader.Close();                if (stream != null)                    stream.Close();            }            return null;        }        #endregion