如何在时间+ 05：30的日期时间输出日期，而不是字符串 [英] How do I get output as date with time+05:30 in date time but not in string

问题描述

var dt = DateTime.Now.ToString("o");
           DateTime date = DateTime.ParseExact(dt, "yyyy-MM-dd HH:mm:ss,fff", System.Globalization.CultureInfo.InvariantCulture);
           Console.WriteLine(date);
           Console.ReadLine();

我的尝试：



我得到的输出为2017-08-21T12：48：33 PM但我希望输出为2017-08-21T12：48：33.3060423 + 05:30（即日期时间不在字符串中）

What I have tried:

I am getting the output as 2017-08-21T12:48:33 PM but I want output as 2017-08-21T12:48:33.3060423+05:30 (i.e in date time not in string)

推荐答案

你不能。 DateTime值没有与之关联的格式 - 从特定时刻开始，它们纯粹是一些刻度。当它们被格式化为字符串以进行演示时，它们只能在年，月，日甚至毫秒的意义上获得任何格式。

要根据需要格式化DateTime：

You can't. DateTime values do not have a format associated with them - they are purely a number of ticks since a particular moment in time. They only acquire any format at all in the sense of years, month, days, or even milliseconds when they are formatted into a string for presentation.
To format the DateTime as you want try:

Console.WriteLine(date.ToString("yyyy-MM-ddTHH:mm:ss.fffffffzzz"));

MM和SS更改为mm和ss - ：O [/ edit]

[edit]MM and SS changed to mm and ss - :O [/edit]

对于简单的转换，您确定所有用户都在使用相同的当前文化设置：

For simple conversions where you are sure all your users are using the same current Culture settings:

using System.Globalization;

public string FormatIndiaTime(DateTime dt)
{
    return dt.ToString("yyyy-MM-ddThh:mm:ss.ffffff+05:30");
}

// sample use in some method
var dtUTC = TimeZoneInfo.ConvertTime(DateTime.Now, TimeZoneInfo.Utc);

var dtIndia = TimeZoneInfo.ConvertTime(dtUTC, TimeZoneInfo.FindSystemTimeZoneById("India Standard Time"));

Console.WriteLine(FormatIndiaTime(dtIndia));

// sample output: 2017-10-22T05:10:39.494879+05:30

var utcFromIST = TimeZoneInfo.ConvertTimeToUtc(dtIndia, TimeZoneInfo.Utc);

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