Windows服务定时运行，判断当前时间是否在配置时间段内

         /// <summary>
         /// 判断程序是否在设置运行时间内
         /// </summary>
         /// <param name="startTime">开始执行时间</param>
         /// <param name="overTime">执行结束时间</param>
         /// <returns>true：在执行时间内，false：在执行时间外</returns>
         private bool IsRunTime(string startTime, string overTime)
         {
             var flag = false;

             var beginTime = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " " + startTime);
             var endTime = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " " + overTime);

             if (beginTime <= endTime)   // 当天
             {
                 flag = beginTime <= DateTime.Now && DateTime.Now <= endTime;
             }
             else    // 跨天
             {
                 var zeroTime = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " 00:00");
                 flag = (beginTime <= DateTime.Now && DateTime.Now <= zeroTime.AddDays()) || (zeroTime <= DateTime.Now && DateTime.Now <= endTime);
             }

             return flag;
         }