我如何得到所有的工作日和日期在一個月

Question

我想獲得選定5月的工作日與像週一或週二，等這一天一起？這怎麼可能？有沒有內置的功能，我不知道？

這是在C＃2.0，asp.net使用VS 2005

Answer 1

我並沒有對閏年的保證，夏令跳躍，特殊的日子，Shanghai 1927等

public List<DateTime> getWeekdatesandDates(int Month, int Year) 
{ 
    List<DateTime> weekdays = new List<DateTime>(); 

    DateTime firstOfMonth = new DateTime(Year, Month, 1); 

    DateTime currentDay = firstOfMonth; 
    while (firstOfMonth.Month == currentDay.Month) 
    { 
     DayOfWeek dayOfWeek = currentDay.DayOfWeek; 
     if (dayOfWeek != DayOfWeek.Saturday && dayOfWeek != DayOfWeek.Sunday) 
      weekdays.Add(currentDay); 

     currentDay = currentDay.AddDays(1); 
    } 

    return weekdays; 
} 

所得DateTime對象有一個DayOfWeek屬性，你可以檢查它是否是星期一到星期五。

Answer 2

這應該工作

private List<DateTime> getWeekDayDates(int month, int year) 
{ 
    List<DateTime> weekdays = new List<DateTime>(); 
    DateTime basedt = new DateTime(year, month, 1); 
    while ((basedt.Month == month) && (basedt.Year == year)) 
    { 
     if (basedt.DayOfWeek == (DayOfWeek.Monday | DayOfWeek.Tuesday | DayOfWeek.Wednesday | DayOfWeek.Thursday | DayOfWeek.Friday)) 
     { 
      weekdays.Add(new DateTime(basedt.Year, basedt.Month, basedt.Day)); 
     } 
     basedt = basedt.AddDays(1); 
    } 
    return weekdays; 
} 

然後你就可以擺脫每次需要的DateTime的任何信息。