有datetime.now返回最近的秒 [英] Have datetime.now return to the nearest second

问题描述

我有一个要求将时间戳记到最接近的秒数……但没有比这更准确的了。四舍五入或截断时间就可以了。

I have a "requirement" to give a timestamp to the nearest second... but NOT more accurate than that. Rounding or truncating the time is fine.

我想出了这个可憎之物

 dateTime = DateTime.Parse(DateTime.UtcNow.ToString("U"));

（U是长格式日期和时间。 2007年1月3日17:25:30）

(U is the Long format date and time. "03 January 2007 17:25:30")

是否有一些不太可怕的方法来实现这一目标？

Is there some less horrific way of achieving this?

编辑：因此，从链接的截短毫秒答案中（谢谢约翰·奥多姆（John Odom））

So from the linked truncate milliseconds answer (thanks John Odom) I am going to do this

 private static DateTime GetCurrentDateTimeNoMilliseconds()
        {
            var currentTime = DateTime.UtcNow;
            return new DateTime(currentTime.Ticks - (currentTime.Ticks % TimeSpan.TicksPerSecond), currentTime.Kind);
        }

恐怖程度较小。.但是它确实保留了日期时间的种类我很在乎。我的解决方案没有。

barely less horrific.. but it does preserve the 'kind' of datetime which I do care about. My solution did not.

推荐答案

您可以将其实现为扩展方法，使您可以将给定的DateTime调整为指定的精度。使用基础的标记：

You could implement this as an extension method that allows you to trim a given DateTime to a specified accuracy using the underlying Ticks:

public static DateTime Trim(this DateTime date, long ticks) {
   return new DateTime(date.Ticks - (date.Ticks % ticks), date.Kind);
}

然后可以很容易地将日期调整为各种精度，例如：

Then it is easy to trim your date to all kinds of accuracies like so:

DateTime now = DateTime.Now;
DateTime nowTrimmedToSeconds = now.Trim(TimeSpan.TicksPerSecond);
DateTime nowTrimmedToMinutes = now.Trim(TimeSpan.TicksPerMinute);

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