有時(shí)，我們?cè)诔绦蛑行枰?jì)算某月的實(shí)際工作日，如幼兒園中收伙食費(fèi)時(shí)按當(dāng)月實(shí)際的工作日（不包括周六周日）來(lái)計(jì)算的，下面這個(gè)程序就是實(shí)現(xiàn)這個(gè)算法的。

private int getDays(System.DateTime date1)
{
        int m=System.DateTime.DaysInMonth(date1.Year,date1.Month);
        int mm=0;
        for(int i=1;i<=m;i++)
        {
                System.DateTime date=Convert.ToDateTime(date1.Year+"-"+date1.Month+"-"+i);
                switch (date.DayOfWeek)
                {
                        case System.DayOfWeek.Monday:
                        case System.DayOfWeek.Thursday:
                        case System.DayOfWeek.Tuesday:
                        case System.DayOfWeek.Wednesday:
                        case System.DayOfWeek.Friday:
                                mm=mm+1;
                                break;
                } 
        }
        return mm;
}

具體使用方法如下：

int days =getDays(System.DateTime.Now));