c# 使用事务

EcAttendanceMatterBLL.OpenTransaction();
DbTransaction Tran = EcAttendanceMatterBLL.Transaction;
_wfibll.Transaction = Tran;
try{
     EcAttendanceMatterBLL.Insert(_EcAttendanceMatterInfo, "");
     _wfibll.Insert(_wfi, "");
     Tran.Commit();
}
catch(Exception ex)
{
     Tran.Rollback();
}