/// 
        /// 计算今天有效工作小时数        /// 
        public static Decimal GetWorkHour(CheckOnModel todayCheckOn)        {            //计算今天有效工作小时数            //正常情况上下班 早上早与9:00 下班晚于18:00            DateTime amTime = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " 09:01");            DateTime pmTime = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " 18:00");            DateTime noonBreakStartTime = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " 12:30");            DateTime noonBreakEndTime = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " 13:30");            CheckOnModel copyCheckOn = CheckOnModel.DeepCopy(todayCheckOn);            //扣除一个小时午休            bool subtractOneHour = true;            //早于9:05分上班 上班打卡时间从9点起算            if (todayCheckOn.OnDutyTime.Value <= amTime)            {                copyCheckOn.OnDutyTime = amTime.AddMinutes(-1);            }            //在午休时间上班 从午休结束时开始算            if (todayCheckOn.OnDutyTime.Value >= noonBreakStartTime && todayCheckOn.OnDutyTime.Value <= noonBreakEndTime)            {                copyCheckOn.OnDutyTime = noonBreakEndTime;                subtractOneHour = false;//不再扣除午休时间            }            //从午休结束后开始上班            if (todayCheckOn.OnDutyTime.Value >= noonBreakEndTime)            {                subtractOneHour = false;//不再扣除午休时间            }            //下班打卡时间从18点起算            if (todayCheckOn.OffDutyTime.Value >= pmTime)            {                copyCheckOn.OffDutyTime = pmTime;            }            //下班时间介于午休时间            if (copyCheckOn.OffDutyTime.Value >= noonBreakStartTime && copyCheckOn.OffDutyTime.Value < noonBreakEndTime)            {                copyCheckOn.OffDutyTime = noonBreakStartTime;                subtractOneHour = false;//不再扣除午休时间            }            //下班时间早于午休时间            if (copyCheckOn.OffDutyTime.Value < noonBreakStartTime)            {                subtractOneHour = false;//不再扣除午休时间            }            if (subtractOneHour)            {                copyCheckOn.WorkHour = Convert.ToDecimal((copyCheckOn.OffDutyTime.Value - copyCheckOn.OnDutyTime.Value).TotalHours - 1);            }            else            {                copyCheckOn.WorkHour = Convert.ToDecimal((copyCheckOn.OffDutyTime.Value - copyCheckOn.OnDutyTime.Value).TotalHours);            }            //午休时间打卡走人的,可能为负数            if (copyCheckOn.WorkHour < 0)            {                copyCheckOn.WorkHour = 0;            }            //补签成功的 视为正常打卡 但要减去扣除小时数            if (copyCheckOn.Status == "Y" && copyCheckOn.EditMan != new Guid())            {                copyCheckOn.WorkHour = 8 - copyCheckOn.SubtractHour;            }            return copyCheckOn.WorkHour;        }