C＃将字符串日期格式转换为另一个字符串的最佳方法？ [英] C# Best way to convert string date format to another string?

问题描述

我将以下日期存储为字符串

I have the following date stored as a string

  04.09.2009 (dd.mm.yyyy)

现在我希望将其更改为以下格式：

Now I would like it changed to this format:

  2009/08/31 (yyyy/mm/dd)

请记住，输出应为字符串值，输入日期为字符串。

Remember output should be a string value and the input date is a string.

用最少的精力转换它的最佳方法是什么？

What is the best way to convert it with minimal effort?

推荐答案

为什么要将日期存储为字符串？通常这是个坏主意...

Why are you storing the date as a string? That's generally a bad idea...

要将您解析的字符串转换为DateTime值，并将其格式转换为字符串：

To convert the string you parse it into a DateTime value, the format that into a string:

string newFormat = DateTime.ParseExact(theDate, "dd'.'MM'.'yyyy", CultureInfo.InvariantCulture).ToString("yyyy'/'MM'/'dd")

（请注意，您需要在斜杠两边加上撇号，以获取原义字符，否则，它将使用区域性的日期分隔符，该字符可能是不同的字符。）

(Note that you need apostrophes around the slashes to get the literal character, otherwise it will use the date separator character of the culture, which may be a different character.)

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