我已经环顾stackoverflow,甚至看了一些建议的问题,似乎没有人回答,你如何在c#中获得unix时间戳?
当前回答
更新的代码从布拉德与一些事情: 你不需要数学。截断,转换为int或long会自动截断值。 在我的版本中,我使用long而不是int(我们将在2038年用完32位有符号整数)。 此外,还添加了时间戳解析。
public static class DateTimeHelper
{
/// <summary>
/// Converts a given DateTime into a Unix timestamp
/// </summary>
/// <param name="value">Any DateTime</param>
/// <returns>The given DateTime in Unix timestamp format</returns>
public static long ToUnixTimestamp(this DateTime value)
{
return (long)(value.ToUniversalTime().Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
}
/// <summary>
/// Gets a Unix timestamp representing the current moment
/// </summary>
/// <param name="ignored">Parameter ignored</param>
/// <returns>Now expressed as a Unix timestamp</returns>
public static long UnixTimestamp(this DateTime ignored)
{
return (long)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
}
/// <summary>
/// Returns a local DateTime based on provided unix timestamp
/// </summary>
/// <param name="timestamp">Unix/posix timestamp</param>
/// <returns>Local datetime</returns>
public static DateTime ParseUnixTimestamp(long timestamp)
{
return (new DateTime(1970, 1, 1)).AddSeconds(timestamp).ToLocalTime();
}
}
其他回答
使用。net 6.0,使用long避免2038问题:
DateTime。UtcNow到UnixTime:
long seconds = (long)DateTime.UtcNow.Subtract(DateTime.UnixEpoch).TotalSeconds;
(seconds是一个长值,将包含自01/01/1970或UnixTime以来的秒数)
UnixTime到DateTime。UtcNow:
DateTime timestamp = DateTime.UnixEpoch.AddSeconds(seconds);
小提琴:https://dotnetfiddle.net/xNhO6q
我正在使用的简单代码:
public static long CurrentTimestamp()
{
return (long)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds * 1000);
}
这段代码给出了unix时间戳,从1970-01-01到现在的总毫秒数。
如果你有一个长时间的UTC时间戳,还有一个更快的快捷方式。
/// <summary>
/// Convert Ticks to Unix Timestamp
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
public static long ToUnixTimestamp(long time)
{
return (time - 621355968000000000) / TimeSpan.TicksPerMillisecond;
}
更新的代码从布拉德与一些事情: 你不需要数学。截断,转换为int或long会自动截断值。 在我的版本中,我使用long而不是int(我们将在2038年用完32位有符号整数)。 此外,还添加了时间戳解析。
public static class DateTimeHelper
{
/// <summary>
/// Converts a given DateTime into a Unix timestamp
/// </summary>
/// <param name="value">Any DateTime</param>
/// <returns>The given DateTime in Unix timestamp format</returns>
public static long ToUnixTimestamp(this DateTime value)
{
return (long)(value.ToUniversalTime().Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
}
/// <summary>
/// Gets a Unix timestamp representing the current moment
/// </summary>
/// <param name="ignored">Parameter ignored</param>
/// <returns>Now expressed as a Unix timestamp</returns>
public static long UnixTimestamp(this DateTime ignored)
{
return (long)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
}
/// <summary>
/// Returns a local DateTime based on provided unix timestamp
/// </summary>
/// <param name="timestamp">Unix/posix timestamp</param>
/// <returns>Local datetime</returns>
public static DateTime ParseUnixTimestamp(long timestamp)
{
return (new DateTime(1970, 1, 1)).AddSeconds(timestamp).ToLocalTime();
}
}
截断. totalseconds很重要,因为它被定义为当前系统的值。以整个分数秒表示的timspan结构。
那DateTime的扩展呢?第二种方法可能更令人困惑,在存在属性扩展之前,它是值得的。
/// <summary>
/// Converts a given DateTime into a Unix timestamp
/// </summary>
/// <param name="value">Any DateTime</param>
/// <returns>The given DateTime in Unix timestamp format</returns>
public static int ToUnixTimestamp(this DateTime value)
{
return (int)Math.Truncate((value.ToUniversalTime().Subtract(new DateTime(1970, 1, 1))).TotalSeconds);
}
/// <summary>
/// Gets a Unix timestamp representing the current moment
/// </summary>
/// <param name="ignored">Parameter ignored</param>
/// <returns>Now expressed as a Unix timestamp</returns>
public static int UnixTimestamp(this DateTime ignored)
{
return (int)Math.Truncate((DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds);
}