Exemplo n.º 1
0
        private static long mailNum = 0;//用于标记邮件个数,存储邮件时作为唯一标识

        public void RemoveDuplicate()
        {
            List <Record> records = null;

            try
            {
                OleDbConnection con = recordDao.Begin();
                records = recordDao.FindAllRecords(con);


                HashSet <string> hs = new HashSet <string>();
                foreach (Record record in records)
                {
                    string myKey = record.M_subject.Trim() + "_" + record.M_mailincometime.ToString();
                    if (hs.Contains(myKey))
                    {
                        recordDao.DeleteRecordsByID(con, record.M_id);
                    }
                    else
                    {
                        hs.Add(myKey);
                    }
                }

                recordDao.Commit();
            }
            catch (Exception)
            {
                recordDao.RollBack();
                throw;
            }
            finally
            {
                recordDao.Close();
            }
        }