DateTime类型ToString时要显示AM/PM怎么办

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本文介绍了如何在C#中使用DateTime类型显示包含AM/PM标识的时间格式，并解释了格式字符串的具体用法及文化敏感性问题。

DateTime类型ToString时要显示AM/PM怎么办

DateTime time = DateTime.Now;
string s = time.ToString("yyyy.MM.dd hh:mm:ss t\\M");
Console.WriteLine(s);

DateTime time = DateTime.Now;
string s = time.ToString("yyyy.MM.dd hh:mm:ss t\\M");
Console.WriteLine(s);

Explanation: t gives the first character of the AM/PM designator (the localized designator can be retrieved in DateTimeFormatInfo.AMDesignator and DateTimeFormatInfo.PMDesignator). The \\M escapes the M so that DateTime.ToString does not interpret it as part of the format string and print the numerical value of the month.

Note that once you do this you are explicitly being culture insensitive. For example, in Japan, the AM/PM designator differs in the second characters, not the first.