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();
}
}