Question

我想在选择月份时在下拉列表中填充周数当我选择

January

然后它将仅显示从星期一开始的周数

1st week:
Monday(02/01/2012)
2nd week:
Monday(09/01/2012)
3rd week:
Monday(16/01/2012)
4th week:
Monday(23/01/2012)
5th week:
Monday(30/01/2012)

Answer 1

所以听起来你需要在本周的周一找到第一个，然后继续增加一周，直到你不再在同一个月：

using System;
using System.Collections.Generic;

class Test
{
    static void Main(string[] args)
    {
        foreach (DateTime date in GetMondays(2012, 1))
        {
            Console.WriteLine(date);
        }
    }

    static IEnumerable<DateTime> GetMondays(int year, int month)
    {
        DateTime startOfMonth = new DateTime(year, month, 1);

        // Get to the first Monday
        int daysToMonday = DayOfWeek.Monday - startOfMonth.DayOfWeek;

        // Now make sure it's non-negative...
        int daysToNextMonday = (daysToMonday + 7) % 7;

        // Add it to the start of the month to get to the first Monday
        DateTime firstMonday = startOfMonth.AddDays(daysToNextMonday);

        // Now yield and iterate until we're done
        for (DateTime date = firstMonday;
             date.Month == month;
             date = date.AddDays(7))
        {
            yield return date;
        }
    }
}

（您可以将日期添加到列表中，如果您愿意，则返回该日期......实际上并没有太大区别。）

Answer 2

简单地解析从月份的开始日期到月份的结束日期的所有内容。
每天检查DayOfWeek并打印结果

如何使用asp.net填充一个月的几周？

2 个答案: