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

问题描述

有这个示例代码，但是它开始谈到毫秒/纳秒的问题。

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纪元以来的秒数。

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

这是我到目前为止已有的：

This is what I've got so far:

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

你需要什么：

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

或者，对于Java（不同）：

Or, for Java (which is different):

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

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