C# 中的 Unix 时间转换

发布于 2024-12-13 10:49:18 字数 1081 浏览 1 评论 0原文

我正在尝试以unix时间获取GMT。我使用以下代码：


        public static long GetGMTInMS()
        {
            var unixTime = DateTime.Now.ToUniversalTime() -
                new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

            return (long)unixTime.TotalMilliseconds;
        }

然后，为了将 unix 时间转换回 DatTime 对象，我使用以下代码：


        public static DateTime UnixTimeStampToDateTime(double unixTimeStamp)
        {
            System.DateTime dtDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            dtDateTime = dtDateTime.AddMilliseconds(unixTimeStamp).ToLocalTime();
            return dtDateTime;
        }

当我运行它时，GetGMTInMS() 1320249196267。当我将其传递给 UnixTimeStampToDateTime() 时，我得到 {11/2/2011 11:53:16 AM}

这很好。这是我运行代码的正确时间。我遇到的问题是当我尝试将 1320249196267 放入 unix 时间转换器时，例如 this，它返回完全错误的时间。

另一个问题是我在东部时区。这返回了我所在时区的时间。这是 DateTime 对象处理的事情还是我没有得到 GMT。

原文

I am trying to get the GMT in unix time. I use the following code:


        public static long GetGMTInMS()
        {
            var unixTime = DateTime.Now.ToUniversalTime() -
                new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

            return (long)unixTime.TotalMilliseconds;
        }

To then convert the unix time back to a DatTime object, I use this:


        public static DateTime UnixTimeStampToDateTime(double unixTimeStamp)
        {
            System.DateTime dtDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            dtDateTime = dtDateTime.AddMilliseconds(unixTimeStamp).ToLocalTime();
            return dtDateTime;
        }

When I run it, the GetGMTInMS() 1320249196267. When I pass it to UnixTimeStampToDateTime() I get {11/2/2011 11:53:16 AM}

Which is fine. That is the correct time fro when I ran my code. The issue I have is when I try and put 1320249196267 into an unix time converter, such as this, it returns the totally wrong time.

The other issue, is i am in the eastern time zone. This returned the time in my time zone. Is this something that the DateTime object handles or am I not getting the GMT.

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￡冰雨忧蓝° 2024-12-20 10:49:18

在大多数情况下，“Unix 时间戳”是指自纪元以来的秒，而不是毫秒......小心！然而，像 Java 这样的东西使用“自纪元以来的毫秒”，这可能是您实际上关心的 - 尽管您展示了工具。这实际上取决于您的需要。

此外，您不应该按照当地时间做任何事情。始终坚持世界时间。

我会：

private static readonly DateTime UnixEpoch =
    new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

public static long GetCurrentUnixTimestampMillis()
{
    return (long) (DateTime.UtcNow - UnixEpoch).TotalMilliseconds;
}

public static DateTime DateTimeFromUnixTimestampMillis(long millis)
{
    return UnixEpoch.AddMilliseconds(millis);
}

public static long GetCurrentUnixTimestampSeconds()
{
    return (long) (DateTime.UtcNow - UnixEpoch).TotalSeconds;
}

public static DateTime DateTimeFromUnixTimestampSeconds(long seconds)
{
    return UnixEpoch.AddSeconds(seconds);
}

"Unix timestamp" means seconds since the epoch in most situations rather than milliseconds... be careful! However, things like Java use "milliseconds since the epoch" which may be what you actually care about - despite the tool you showed. It really depends on what you need.

Additionally, you shouldn't be doing anything with local time. Stick to universal time throughout.

I would have:

private static readonly DateTime UnixEpoch =
    new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

public static long GetCurrentUnixTimestampMillis()
{
    return (long) (DateTime.UtcNow - UnixEpoch).TotalMilliseconds;
}

public static DateTime DateTimeFromUnixTimestampMillis(long millis)
{
    return UnixEpoch.AddMilliseconds(millis);
}

public static long GetCurrentUnixTimestampSeconds()
{
    return (long) (DateTime.UtcNow - UnixEpoch).TotalSeconds;
}

public static DateTime DateTimeFromUnixTimestampSeconds(long seconds)
{
    return UnixEpoch.AddSeconds(seconds);
}

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