/// <summary>
        /// 寻找所有的Completed和Incompleted的case
        /// </summary>
        /// <returns></returns>
        private List <Record> FindSourceCompletedAndIncompletedRecords()
        {
            List <Record> records = null;

            try
            {
                OleDbConnection con = recordDao.Begin();
                records = recordDao.FindRecordsCompletedAndIncompleted(con);
                recordDao.Commit();
                return(records);
            }
            catch (Exception)
            {
                recordDao.RollBack();
                throw;
            }
            finally
            {
                recordDao.Close();
            }
        }