如何确定最后一个营业日在某一个月？ [英] How to determine the last business day in a given month?

问题描述

我如何计算在.NET月份的最后一个营业日？

How can I calculate the last business day of the month in .NET?

推荐答案

我会做这样的周一至周五商业周刊：

I would do it like this for a Monday through Friday business week:

var holidays = new List<DateTime>{/* list of observed holidays */};
DateTime lastBusinessDay = new DateTime();
var i = DateTime.DaysInMonth(year, month);
while (i > 0)
{
  var dtCurrent = new DateTime(year, month, i);
  if(dtCurrent.DayOfWeek < DayOfWeek.Saturday && dtCurrent.DayOfWeek > DayOfWeek.Sunday && 
   !holidays.Contains(dtCurrent))
    {
      lastBusinessDay = dtCurrent;
      i = 0;
    }
    else
    {
      i = i - 1;
    }
}

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