//寫入一筆新的LoginRecoder , 並刪除超過保留時間的Recoder
        internal static void InsertDelete(SwitchUserLog Log, int KeepDays)
        {
            using (SqlConnection SqlConnection = ConnectionManager.GetConnection())
            {
                SqlCommand SqlCommand = SqlConnection.CreateCommand();

                SqlCommand.CommandText = "INSERT INTO "
                                       + " MemberShip_SwitchUserLog "
                                       + " ( Id, Account, Ip, Remark, CreateTime ) "
                                       + "VALUES "
                                       + " ( @Id, @Account, @Ip, @Remark, @CreateTime ) ; "

                                       + "DELETE "
                                       + " MemberShip_SwitchUserLog "
                                       + "WHERE "
                                       + " CreateTime <= @LimitTime ; ";

                SqlCommand.Parameters.AddWithValue("Id", Log.Id);
                SqlCommand.Parameters.AddWithValue("Account", Log.Account);
                SqlCommand.Parameters.AddWithValue("Ip", Log.Ip);
                SqlCommand.Parameters.AddWithValue("Remark", Log.Remark);
                SqlCommand.Parameters.AddWithValue("CreateTime", Log.CreateTime);

                SqlCommand.Parameters.AddWithValue("LimitTime", DateTime.Now.AddDays(KeepDays * -1).ToShortDateString());

                SqlConnection.Open();
                SqlCommand.ExecuteNonQuery();
            }
        }
        //建立一個新的登入紀錄(因為一次登入只會建立一筆登入紀錄,所以就不採用GetNew的方式撰寫了)
        private static SwitchUserLog CreateSwitchUserLog(User User, string Remark)
        {
            SwitchUserLog NewSwitchUserLog = new SwitchUserLog(Guid.NewGuid().ToString(), User.Account, HttpContext.Current.Request.UserHostAddress, Remark, DateTime.Now);

            //寫入資料庫,並限制最多保留3天內的紀錄就好
            SwitchUserAccessor.InsertDelete(NewSwitchUserLog, 3);

            return NewSwitchUserLog;
        }