这里有一个示例代码，但是它开始讨论毫秒/纳秒的问题。
同样的问题出现在MSDN上，从c#的Unix时代开始。
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);
}
}
当前回答
Unix epoch现在是DateTime类的一部分。将millis转换为DateTime非常简单
DateTime.UnixEpoch.AddMilliseconds(millis)
其他回答
DateTime到UNIX时间戳:
public static double DateTimeToUnixTimestamp(DateTime dateTime)
{
return (TimeZoneInfo.ConvertTimeToUtc(dateTime) -
new DateTime(1970, 1, 1, 0, 0, 0, 0, System.DateTimeKind.Utc)).TotalSeconds;
}
写了一个最简单的扩展，为我们工作。如果有人找它……
public static class DateTimeExtensions
{
public static DateTime FromUnixTimeStampToDateTime(this string unixTimeStamp)
{
return DateTimeOffset.FromUnixTimeSeconds(long.Parse(unixTimeStamp)).UtcDateTime;
}
}
看到IdentityModel。EpochTimeExtensions
public static class EpochTimeExtensions
{
/// <summary>
/// Converts the given date value to epoch time.
/// </summary>
public static long ToEpochTime(this DateTime dateTime)
{
var date = dateTime.ToUniversalTime();
var ticks = date.Ticks - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).Ticks;
var ts = ticks / TimeSpan.TicksPerSecond;
return ts;
}
/// <summary>
/// Converts the given date value to epoch time.
/// </summary>
public static long ToEpochTime(this DateTimeOffset dateTime)
{
var date = dateTime.ToUniversalTime();
var ticks = date.Ticks - new DateTimeOffset(1970, 1, 1, 0, 0, 0, TimeSpan.Zero).Ticks;
var ts = ticks / TimeSpan.TicksPerSecond;
return ts;
}
/// <summary>
/// Converts the given epoch time to a <see cref="DateTime"/> with <see cref="DateTimeKind.Utc"/> kind.
/// </summary>
public static DateTime ToDateTimeFromEpoch(this long intDate)
{
var timeInTicks = intDate * TimeSpan.TicksPerSecond;
return new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddTicks(timeInTicks);
}
/// <summary>
/// Converts the given epoch time to a UTC <see cref="DateTimeOffset"/>.
/// </summary>
public static DateTimeOffset ToDateTimeOffsetFromEpoch(this long intDate)
{
var timeInTicks = intDate * TimeSpan.TicksPerSecond;
return new DateTimeOffset(1970, 1, 1, 0, 0, 0, TimeSpan.Zero).AddTicks(timeInTicks);
}
}
System.DateTimeOffset.Now.ToUnixTimeSeconds()
DateTime unixEpoch = DateTime.ParseExact("1970-01-01", "yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture);
DateTime convertedTime = unixEpoch.AddMilliseconds(unixTimeInMillisconds);
当然，可以将unixEpoch设置为全局静态，这样它只需要在项目中出现一次，如果UNIX时间以秒为单位，则可以使用AddSeconds。
反过来说:
double unixTimeInMilliseconds = timeToConvert.Subtract(unixEpoch).TotalMilliseconds;
截断为Int64和/或根据需要使用TotalSeconds。
