在C#中如何将Unix风格的时间戳转换为yyyy-MM-ddThh:mm:ssZ格式?
开始将您的毫秒转换为 TimeSpan
:
var time = TimeSpan.FromMilliseconds(milliseconds);
现在,在 .NET 4 中,您可以使用格式化字符串参数调用 .ToString()
。请参见http://msdn.microsoft.com/en-us/library/system.timespan.tostring.aspx
在以前的 .NET 版本中,您需要手动从 TimeSpan 的属性构建格式化字符串。
使用 DateTime(long ticks) 构造函数即可。每个tick代表100纳秒,因此乘以10000即可得到1毫秒。
新的DateTime对象将会被创建并以numTicks * 10000所表示的时间距离自0001年1月1日午夜以来的100纳秒间隔为基础。
如果毫秒基于UNIX纪元时间,那么您可以使用以下方法:
var posixTime = DateTime.SpecifyKind(new DateTime(1970, 1, 1), DateTimeKind.Utc);
var time = posixTime.AddMilliseconds(milliSecs);
DateTimeOffset.FromUnixTimeMilliseconds(milliseconds);
如果需要,您可以仅获取日期时间。
这里是您需要的内容:
public static class UnixDateTime
{
public static DateTimeOffset FromUnixTimeSeconds(long seconds)
{
if (seconds < -62135596800L || seconds > 253402300799L)
throw new ArgumentOutOfRangeException("seconds", seconds, "");
return new DateTimeOffset(seconds * 10000000L + 621355968000000000L, TimeSpan.Zero);
}
public static DateTimeOffset FromUnixTimeMilliseconds(long milliseconds)
{
if (milliseconds < -62135596800000L || milliseconds > 253402300799999L)
throw new ArgumentOutOfRangeException("milliseconds", milliseconds, "");
return new DateTimeOffset(milliseconds * 10000L + 621355968000000000L, TimeSpan.Zero);
}
public static long ToUnixTimeSeconds(this DateTimeOffset utcDateTime)
{
return utcDateTime.Ticks / 10000000L - 62135596800L;
}
public static long ToUnixTimeMilliseconds(this DateTimeOffset utcDateTime)
{
return utcDateTime.Ticks / 10000L - 62135596800000L;
}
[Test]
public void UnixSeconds()
{
DateTime utcNow = DateTime.UtcNow;
DateTimeOffset utcNowOffset = new DateTimeOffset(utcNow);
long unixTimestampInSeconds = utcNowOffset.ToUnixTimeSeconds();
DateTimeOffset utcNowOffsetTest = UnixDateTime.FromUnixTimeSeconds(unixTimestampInSeconds);
Assert.AreEqual(utcNowOffset.Year, utcNowOffsetTest.Year);
Assert.AreEqual(utcNowOffset.Month, utcNowOffsetTest.Month);
Assert.AreEqual(utcNowOffset.Date, utcNowOffsetTest.Date);
Assert.AreEqual(utcNowOffset.Hour, utcNowOffsetTest.Hour);
Assert.AreEqual(utcNowOffset.Minute, utcNowOffsetTest.Minute);
Assert.AreEqual(utcNowOffset.Second, utcNowOffsetTest.Second);
}
[Test]
public void UnixMilliseconds()
{
DateTime utcNow = DateTime.UtcNow;
DateTimeOffset utcNowOffset = new DateTimeOffset(utcNow);
long unixTimestampInMilliseconds = utcNowOffset.ToUnixTimeMilliseconds();
DateTimeOffset utcNowOffsetTest = UnixDateTime.FromUnixTimeMilliseconds(unixTimestampInMilliseconds);
Assert.AreEqual(utcNowOffset.Year, utcNowOffsetTest.Year);
Assert.AreEqual(utcNowOffset.Month, utcNowOffsetTest.Month);
Assert.AreEqual(utcNowOffset.Date, utcNowOffsetTest.Date);
Assert.AreEqual(utcNowOffset.Hour, utcNowOffsetTest.Hour);
Assert.AreEqual(utcNowOffset.Minute, utcNowOffsetTest.Minute);
Assert.AreEqual(utcNowOffset.Second, utcNowOffsetTest.Second);
Assert.AreEqual(utcNowOffset.Millisecond, utcNowOffsetTest.Millisecond);
}
}
这个示例将演示一般思路,但是您需要知道如果您的起始日期是DateTime.MinValue还是其他时间:
int ms = 1000; // One second
var date = new DateTime(ms * 10000); // The constructor takes number of 100-nanoseconds ticks since DateTime.MinValue (midnight, january 1st, year 1)
string formatted = date.ToString("yyyy-MM-ddTHH:mm:ssZ");
Console.WriteLine(formatted);
long ticks = new DateTime(1979, 07, 28, 22, 35, 5,
new CultureInfo("en-US", false).Calendar).Ticks;
DateTime dt3 = new DateTime(ticks);
Console.Write(dt3.ToString("yyyy-MM-ddThh:mm:ssZ"));
private static DateTime Milliseconds2Date(Double d)
{
TimeSpan time = TimeSpan.FromMilliseconds(d);
return new DateTime(1970, 1, 1) + time;
}
private static Double Date2Milliseconds(DateTime d)
{
var t = d.Subtract(new DateTime(1970, 1, 1));
return t.TotalMilliseconds;
}
这个问题应该有你需要的答案。
简短版:
DateTime date = new DateTime(long.Parse(ticks));
date.ToString("yyyy-MM-ddThh:mm:ssZ");