//计算可工作时间数

//sDay为指定日期
        public static string getEfDay(DateTime sDay)
        {
            //定义要返回的总天数
            int num = 0;

            //定义法定假日
            string[] holiday = new string[10];
            holiday[0] = "2010/1/1";
            holiday[1] = "2010/2/15";
            holiday[2] = "2010/2/16";
            holiday[3] = "2010/2/17";
            holiday[4] = "2010/5/3";
            holiday[5] = "2010/6/16";
            holiday[6] = "2010/9/22";
            holiday[7] = "2010/10/1";
            holiday[8] = "2010/10/4";
            holiday[9] = "2010/10/5";

            DateTime initDay = new DateTime(sDay.Year,1,1);

            while (initDay <= sDay)
            {
                //首先判断是否是法定假日
                bool flag = false;
                for (int i = 0; i < holiday.Length; i++)
                {
                    if (initDay.ToString("yyyy-MM-dd") == Convert.ToDateTime(holiday[i]).ToString("yyyy-MM-dd"))
                    { flag = true; break; }
               
                }
                if (!flag)
                {
                    if (initDay.DayOfWeek.ToString() != "Saturday" && initDay.DayOfWeek.ToString() != "Sunday")
                    {
                        num++;
                    }
                }
                initDay = initDay.AddDays(1);
            }
            return num.ToString();
        }