c# - 计算一周内工作的天数而不循环？

Question

我需要计算工作的总天数，给定结构说明一周中的哪几天工作以及从和到日期。

我目前的算法是这样的:

protected int TotalWorkDays(DateTime From, DateTime dtTo,WorkedDays days)
    {
        int Days = 0;
        DayOfWeek DOW;
        for (DateTime curDate = From; curDate.Date <= dtTo.Date; curDate = curDate.AddDays(1))
        {
            DOW = curDate.DayOfWeek;
            if ((DOW == DayOfWeek.Sunday &  days.Sunday) |
                (DOW == DayOfWeek.Monday &  days.Monday) |
                (DOW == DayOfWeek.Tuesday &  days.Tuesday) |
                (DOW == DayOfWeek.Wednesday &  days.Wednesday) |
                (DOW == DayOfWeek.Thursday &  days.Thursday) |
                (DOW == DayOfWeek.Friday &  days.Friday) |
                (DOW == DayOfWeek.Saturday &  days.Saturday)
               )
            {
                Days += 1;
            }
        }
        return Days;
    }

我几乎肯定这可以在没有循环的情况下完成，但我似乎无法弄清楚。谁能帮我找到更高效的算法？

Answer 1

计算从和到日期之间的周数(使用减法和除法)。然后将其乘以每周工作的天数。对最终案例做一些减法(从/到日期在一周的中间)。