1.首先是程式碼實現：

1.1獲取工作日天數

        /// <summary>
        /// 獲取兩個日期之間的工作日天數
        /// </summary>
        /// <param name="BeginDate">開始日期</param>
        /// <param name="EndDate">結束日期</param>
        /// <returns></returns>
        public int GetWorkDays(string BeginDate, string EndDate)
        {
            DateTime Start = Convert.ToDateTime(BeginDate);
            DateTime End = Convert.ToDateTime(EndDate); ;//獲取今天日期
            TimeSpan Tspan = End.Subtract(Start);//TimeSpan得到dt1和dt2的時間間隔
            int DayCount = Tspan.Days;//獲取兩個日期間的總天數
            int WorkDayCount = 0;//工作日
            //迴圈用來扣除總天數中的雙休日
            for (int i = 0; i <= DayCount; i++)
            {
                DateTime tempdt = Start.Date.AddDays(i);
                if (tempdt.DayOfWeek != System.DayOfWeek.Saturday && tempdt.DayOfWeek != System.DayOfWeek.Sunday)
                {
                    WorkDayCount++;
                }
            }
            return WorkDayCount;
        }
 

 1.2 獲取兩個日期之間的日期列表：

此處根據傳入月份和年份實現，同樣也可以傳入兩個日期進行實現，同時附加兩個獲取年份和月份列表的函式。

        /// <summary>
        /// 根據月份獲取當前月份的天數
        /// </summary>
        /// <param name="Years">年份</param>
        /// <param name="Month">月份</param>
        /// <returns></returns>
        public List<string> GetDayList(string Years, int Month)
        {
            List<string> List = new List<string>();
            int Day = DateTime.DaysInMonth(int.Parse(Years), Month); ;
            for (int i = 0; i <= Day; i++)
            {
                List.Add(string.Format(@"{0}-{1}-{2}", Years, Month.ToString("D2"), i.ToString("D2")));
            }
            return List;
        }
        public SelectList GetYearsList()
        {
            var options = new List<SelectListItem>();
            int Year = DateTime.Now.Year;
            for (int i = Year; i < 2016; i--)
            {
                options.Add(new SelectListItem { Text = i.ToString(), Value = i.ToString() });
            }
            return new SelectList(options, "Value", "Text", "");
        }
        public SelectList GetMonthList()
        {
            var options = new List<SelectListItem>();
            int Year = DateTime.Now.Year;
            for (int i = 1; i <= 12; i++)
            {
                options.Add(new SelectListItem { Text = i.ToString(), Value = i.ToString() });
            }
            return new SelectList(options, "Value", "Text", "");
        }
    }
 

2 SQL 實現：

2.1獲取工作日列表。

select * from 
(
SELECT CONVERT(NVARCHAR(10), DateAdd(day,number,'2017-09-29'),120) AS Date,  
Datename(weekday, CONVERT(NVARCHAR(10), DateAdd(day,number,'2017-09-29'),120)) as Type
FROM master..spt_values  
WHERE type = 'p' AND number <= DateDiff(day,'2014-09-29','2019-10-29')) as b 
where Type<>'星期六' and Type<>'星期日'  
 

 2.2 獲取日期列表：

SELECT CONVERT(NVARCHAR(10), DateAdd(day,number,'2017-09-29'),120) AS Date,  
Datename(weekday, CONVERT(NVARCHAR(10), DateAdd(day,number,'2017-09-29'),120)) as Type
FROM master..spt_values  
WHERE type = 'p' AND number <= DateDiff(day,'2014-09-29','2019-10-29')