Question

我有一个表单接受'月'和'年'的输入，我写这里是为了询问我将如何获得所有“工作周”？

我指的是周一至周五的“工作周”

所以基本上我需要第1周到第4周，或者如果可用，包括第5周。

例如，如果我输入2013年1月：

week1 = January 1 to January 4
week2 = January 7 to January 11
week3 = January 14 to January 18
week4 = January 21 to January 25
week5 = January 28 to January 31

我怎样才能实现这一目标？谢谢你的帮助！任何建议或想法将不胜感激。谢谢伙伴们！ :)

Answer 1

您可以使用此Linq查询：

int month = 1;
int year = 2013;
var cal = System.Globalization.CultureInfo.CurrentCulture.Calendar;
IEnumerable<int> daysInMonth = Enumerable.Range(1, cal.GetDaysInMonth(year, month));

List<Tuple<int, DateTime, DateTime>> listOfWorkWeeks = daysInMonth
    .Select(day => new DateTime(year, month, day))
    .GroupBy(d => cal.GetWeekOfYear(d, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday))
    .Select(g => Tuple.Create(g.Key, g.First(), g.Last(d => d.DayOfWeek != DayOfWeek.Saturday && d.DayOfWeek != DayOfWeek.Sunday)))
    .ToList();

// Item1 = week in year, Item2 = first day, Item3 = last working day
int weekNum = 1;
foreach (var weekGroup in listOfWorkWeeks)
{
    Console.WriteLine("Week{0} = {1} {2} to {1} {3}"
        , weekNum++
        , System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(month)
        , weekGroup.Item2.Day
        , weekGroup.Item3.Day);
}

1月的输出：

Week1 = January 1 to January 4
Week2 = January 7 to January 11
Week3 = January 14 to January 18
Week4 = January 21 to January 25
Week5 = January 28 to January 31

和二月：

Week1 = February 1 to February 1
Week2 = February 4 to February 8
Week3 = February 11 to February 15
Week4 = February 18 to February 22
Week5 = February 25 to February 28

Answer 2

查找月份和年份的第一个星期一。

int year = 2013;
int month = 1;

DateTime testDate = new DateTime(year,month,1);


while ( testDate.DayOfWeek != DayOfWeek.Monday )
{
   testDate = testDate.AddDays(1);
}

然后每周迭代一次，直到你达到2013年的一年。

// Should have first monday now.
// Loop until the month changes
while ( testDate.Month == month)
{
   var monday = testDate;
   var friday = testDate.AddDays(4);

   // You now have both dates.  Do whatever you need to.
   // here.

   // Increment test date by a week
   testDate = testDate.AddDays(7)
}

Answer 3

在伪代码中：

从月初的第一天开始
while（day！= Monday）取下一个日期（+1天）

请查看this SO post（Jon Skeet回答！），了解一天是否是星期一。
添加4天以查找工作周结束

如果是在同一个月，那么你的工作周就会得到答案。
添加7天查找下周一
如果新星期一仍然在同一个月内：重复3和4。

编辑以上查找所有完整工作周。

还可以找到其他周：

如果该月的第一天已经是工作日，请查找下周五。 - ＆GT;第一个工作周
如果上个星期五是在下个月，则在该月的最后一天完成最后一个工作周。 - ＆GT;上个工作周

ASP.NET每月工作几周

3 个答案: