日期格式中的年份的周数 [英] Week number of a year in dateformat

问题描述

我需要使用格式 YYYY 和月 MM 等等。我正在寻找是否有格式来获取一年的周数。

I need to get the year I use the format YYYY, and month MM, and so on. I am looking to see if there is a format to get the week number of the year.

我使用的例子的日期是 2008 -03-09 16：05：07.000 ，在这种情况下我想知道 11 的星期编号。有没有办法以编程方式检索 11

The date that I am using as example is 2008-03-09 16:05:07.000, and I would like to know the week number which is 11 in this case. Is there a way to retrieve 11 programmatically?

推荐答案

它提供了周数，但你可以很容易地得到它：

There's no format that provides the weeknumber, but you can get it in this way easily:

System.Globalization.CultureInfo cul = System.Globalization.CultureInfo.CurrentCulture;
int weekNum = cul.Calendar.GetWeekOfYear(
    DateTime.Now, 
    System.Globalization.CalendarWeekRule.FirstFourDayWeek, 
    DayOfWeek.Monday);

• CultureInfo.Calendar 属性


• Calendar.GetWeekOfYear 方法


• 自定义日期和时间格式字符串


• CultureInfo.Calendar Property
• Calendar.GetWeekOfYear Method
• Custom Date and Time Format Strings

回答您的评论如何获取给定的 DateTime ：

To answer your comment how to get the quarter of a year of a given DateTime:

int quarter = (int)((DateTime.Now.Month - 1) / 3) + 1

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