判断一个时间是否在指定的时间范围内

private bool getTimeSpan(string timeStr)
        {
            string[] dayTime = timeStr.Split('-');
            //判断当前时间是否在工作时间段内
            string _strWorkingDayAM = dayTime[0];//工作时间上午08:30
            string _strWorkingDayPM = dayTime[1];//工作时间下午13:10
            TimeSpan dspWorkingDayAM = DateTime.Parse(_strWorkingDayAM).TimeOfDay;
            TimeSpan dspWorkingDayPM = DateTime.Parse(_strWorkingDayPM).TimeOfDay;
            DateTime t1 = DateTime.Now;
            TimeSpan dspNow = t1.TimeOfDay;
            if (dspNow > dspWorkingDayAM && dspNow < dspWorkingDayPM)//在范围内返回true
            {
                return true;
            }
            return false;
        }