C# 如何将 DateTime 对象转换为 YYMMDD 格式？
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How do I convert a DateTime object to YYMMDD format?
提问by Max
Um, probably a really simple question, but I just noticed that I have no idea on how to convert DateTime.Nowto the format YYMMDD, so for example today (5. November 2009) would be "091105".
嗯，可能是一个非常简单的问题，但我只是注意到我不知道如何转换DateTime.Now为 YYMMDD 格式，因此例如今天（2009 年 11 月 5 日）将是“091105”。
I know there are overloads to DateTime.Now.ToString()where you can pass in a format string, but I have not found the right format e.g. for short year format (09 instead of 2009).
我知道DateTime.Now.ToString()您可以在格式字符串中传递重载，但我还没有找到正确的格式，例如短年份格式（09 而不是 2009）。
采纳答案by Dave Downs
DateTime.Now.ToString("yyMMdd")
You may also find the following two posts on MSDN useful as they contain a lot of info about DateTime formatting:
您可能还会发现 MSDN 上的以下两篇文章很有用，因为它们包含大量有关 DateTime 格式的信息：
Standard Date and Time Format Strings
Custom Date and Time Format Strings
回答by Guffa
The reference for the format string is at MSDN: Custom DateTime Format Specifiers.
格式字符串的参考位于MSDN：自定义日期时间格式说明符。
What you are looking for specifically is:
您要特别寻找的是：
yyRepresents the year as a two-digit number. If the year has more than two digits, only the two low-order digits appear in the result. If the year has fewer than two digits, the number is padded with leading zeroes to achieve two digits.
yy将年份表示为两位数。如果年份超过两位数，则结果中只会出现两位低位数字。如果年份少于两位数，则用前导零填充该数字以达到两位数。
MMRepresents the month as a number from 01 through 12. A single-digit month is formatted with a leading zero.
MM将月份表示为从 01 到 12 的数字。一位数月份的格式为前导零。
ddRepresents the day of the month as a number from 01 through 31. A single-digit day is formatted with a leading zero.
dd将月中的日期表示为 01 到 31 之间的数字。一位数的日期格式为前导零。
回答by mallows98
Another alternative that you can do this is by:
您可以执行此操作的另一种选择是：
var formattedDate = string.Format("{0:yyMMdd}", DateTime.Now);
Hope this helps!
希望这可以帮助！
