定时任务 线程处理

Question

哪位大侠出来解决一下，线程的处理
if (drAnswerScoreNull.Read())
            {
                if (int.Parse(drAnswerScoreNull[0].ToString()) > 0)
                {
                    //待阅改成--
                    db.ExecuteNonQuery(operationChange);
                }
                else
                {
                    //线程等待
                    if (drCheckAdviceCount.Read())
                    {
                        if (int.Parse(drCheckAdviceCount[0].ToString()) > 0)
                        {
                            //待审改成审批
                            db.ExecuteNonQuery(oprationChangePending);
                        }
                        else
                        {
                            //结束改成查看
                            db.ExecuteNonQuery(oprationChangeEnd);
                        }
                    }
                }
            }
有三个状态：待阅，待审，结束，
待阅没通过是不能到待审的，
同样待审没通过是不能结束的
用windows service如何处理！！