将xml字符串转化为dataset

 public static DataSet GetDataSet(string DataSetData)
        {
            DataSet ds = new DataSet();
            try
            {
                var rs = StreamManager.String2MemoryStream(DataSetData);
                ds.ReadXml(rs);
                rs.Close();
            }
            catch(Exception ex)
            {
                ds = GetDataSetUtf8(DataSetData);
            }
            return ds;
        }

  static public  MemoryStream String2MemoryStream(string strInput)
        {
            byte[] ReadBuffer = System.Text.Encoding.Default.GetBytes(strInput);
            MemoryStream ReadStread = new MemoryStream(ReadBuffer);
            return ReadStread;
        }

保存下来 以防以后用得到