如何将 Unix 时间戳转换为 DateTime，反之亦然? [英] How can I convert a Unix timestamp to DateTime and vice versa?

问题描述

有这个示例代码，但它开始谈论毫秒/纳秒问题.

There is this example code, but then it starts talking about millisecond / nanosecond problems.

同样的问题在 MSDN 上，自 C# 中的 Unix 时代以来的秒数.

The same question is on MSDN, Seconds since the Unix epoch in C#.

这是我目前得到的:

public Double CreatedEpoch
{
  get
  {
    DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0, 0).ToLocalTime();
    TimeSpan span = (this.Created.ToLocalTime() - epoch);
    return span.TotalSeconds;
  }
  set
  {
    DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0, 0).ToLocalTime();
    this.Created = epoch.AddSeconds(value);
  }
}

推荐答案

您需要的是:

public static DateTime UnixTimeStampToDateTime( double unixTimeStamp )
{
    // Unix timestamp is seconds past epoch
    DateTime dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
    dateTime = dateTime.AddSeconds( unixTimeStamp ).ToLocalTime();
    return dateTime;
}

或者，对于 Java(这是不同的，因为时间戳以毫秒为单位，而不是秒):

Or, for Java (which is different because the timestamp is in milliseconds, not seconds):

public static DateTime JavaTimeStampToDateTime( double javaTimeStamp )
{
    // Java timestamp is milliseconds past epoch
    DateTime dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
    dateTime = dateTime.AddMilliseconds( javaTimeStamp ).ToLocalTime();
    return dateTime;
}

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