c#如何计算一个月剩余的工作日

Question

您好，我是 c# 的新手，一般来说我是编程的新手，我一直在尝试从调整其他人的代码中学习下面的代码，我已经更改了代码，因为我想计算剩余的工作日数在一个月内，但问题是代码运行了一个月中的天数，所以这个月有 29 天，但是当代码运行到 30 时代码错误我无法弄清楚要更改代码的哪一部分任何帮助都会很棒

    private void days()
    {

        //Monday to Friday are business days.
        var weekends = new DayOfWeek[] { DayOfWeek.Saturday, DayOfWeek.Sunday };
        DateTime testing = DateTime.Now;



        string month1 = testing.ToString("M ");
        string year1 = testing.ToString("yyyy");
        int month = Convert.ToInt32(month1);
        int year = Convert.ToInt32(year1);


        //Fetch the amount of days in your given month.
        int daysInMonth = DateTime.DaysInMonth(year, month);
        string daysleft = testing.ToString("d ");
        int daystoday = Convert.ToInt32(daysleft);

        //Here we create an enumerable from 1 to daysInMonth,
        //and ask whether the DateTime object we create belongs to a weekend day,
        //if it doesn't, add it to our IEnumerable<int> collection of days.
        IEnumerable<int> businessDaysInMonth = Enumerable.Range(daystoday, daysInMonth)
                                               .Where(d => !weekends.Contains(new DateTime(year, month, d).DayOfWeek));

        //Pretty smooth.

        int count = 0;
        foreach (var day in businessDaysInMonth)
        {
            count = count + 1;
        }
        textBox9.Text = count.ToString();


    }
}

Answer 1

public static IEnumerable<int> Range(int start, int count)

如您所见，第二个参数不是结束，而是计数。

你想要的计数可能是:daysInMonth - daystoday + 1

我会将您的代码重写为:

private static readonly DayOfWeek[] weekends = new DayOfWeek[] { DayOfWeek.Saturday, DayOfWeek.Sunday };

bool IsWorkDay(DateTime day)//Encapsulate in a function, to simplify dealing with holydays
{
    return !weekends.Contains(day.DayOfWeek);
}

int WorkDaysLeftInMonth(DateTime currentDate)
{
    var remainingDates = Enumerable.Range(currentDate.Day,DateTime.DaysInMonth(currentDate.Year,currentDate.Month)-currentDate.Day+1)
                        .Select(day=>new DateTime(currentDate.Year, currentDate.Month, day));
    return remainingDates.Count(IsWorkDay);
}