通过查看答案和DateTime.Ticks属性，可以从给定的值计算微秒和纳秒。因此，我将此扩展方法类组合在一起来完成此操作。（遗憾的是，我认为如果有其他要求，我将无法使用它，但其他人可能会发现它很有用。）

/// <summary>
/// Extension methods for accessing Microseconds and Nanoseconds of a
/// DateTime object.
/// </summary>
public static class DateTimeExtensionMethods
{
   /// <summary>
   /// The number of ticks per microsecond.
   /// </summary>
   public const int TicksPerMicrosecond = 10;
   /// <summary>
   /// The number of ticks per Nanosecond.
   /// </summary>
   public const int NanosecondsPerTick = 100;

   /// <summary>
   /// Gets the microsecond fraction of a DateTime.
   /// </summary>
   /// <param name="self"></param>
   /// <returns></returns>
   public static int Microseconds(this DateTime self)
   {
      return (int)Math.Floor(
         (self.Ticks 
         % TimeSpan.TicksPerMillisecond )
         / (double)TicksPerMicrosecond);
   }
   /// <summary>
   /// Gets the Nanosecond fraction of a DateTime.  Note that the DateTime
   /// object can only store nanoseconds at resolution of 100 nanoseconds.
   /// </summary>
   /// <param name="self">The DateTime object.</param>
   /// <returns>the number of Nanoseconds.</returns>
   public static int Nanoseconds(this DateTime self)
   {
      return (int)(self.Ticks % TimeSpan.TicksPerMillisecond % TicksPerMicrosecond)
         * NanosecondsPerTick;
   }
   /// <summary>
   /// Adds a number of microseconds to this DateTime object.
   /// </summary>
   /// <param name="self">The DateTime object.</param>
   /// <param name="microseconds">The number of milliseconds to add.</param>
   public static DateTime AddMicroseconds(this DateTime self, int microseconds)
   {
      return self.AddTicks(microseconds * TicksPerMicrosecond);
   }
   /// <summary>
   /// Adds a number of nanoseconds to this DateTime object.  Note: this
   /// object only stores nanoseconds of resolutions of 100 seconds.
   /// Any nanoseconds passed in lower than that will be rounded using
   /// the default rounding algorithm in Math.Round().
   /// </summary>
   /// <param name="self">The DateTime object.</param>
   /// <param name="nanoseconds">The number of nanoseconds to add.</param>
   public static DateTime AddNanoseconds(this DateTime self, int nanoseconds)
   {
      return self.AddTicks((int)Math.Round(nanoseconds / (double)NanosecondsPerTick));
   }
}

这仍然不能让你在创建时设置微秒或纳秒，但它们可以在创建后不久添加。它也不能给予比DateTime更好的分辨率（例如，1/10微秒又名100纳秒分辨率）。

DateTime time = new DateTime(year, month, day, hour, min, sec, msec);
time = time.AddMicroseconds(microseconds);
time = time.AddNanoseconds(nanoseconds); # note: rounds if not enough added

希望这对其他人有用！

如果你想要一个在微秒的几分之一上运行的东西，那么不。你所要求的东西并不作为标准库的一部分存在，但是你所要求的，为什么你需要这个呢？听起来你真的需要两个组件，一个字符串（可变长度，hold几乎是任何可能的值）和一个你本机获得的UTC标准格式的日期/时间的DateTime。
微米/纳米级秒计时不在“正常”的计算范围内，因此“正常”的.NET库中没有提供。
你会用这些时间戳做什么？你会比较它们吗？加/减它们吗？我会建议运行基本DateTime对象的reflector（实际上我想我也会很快地这样做）
为了方便您，这里是标准DateTime对象的.NET Reflector反汇编的简单版本（由于在编辑时的另一个答案也建议使用TimeSpan元素）

[Serializable]
public struct DateTime : IComparable, IFormattable, IConvertible, ISerializable, IComparable<DateTime>, IEquatable<DateTime>
{
    // Fields
    private ulong dateData;
    private const string DateDataField = "dateData";
    private const int DatePartDay = 3;
    private const int DatePartDayOfYear = 1;
    private const int DatePartMonth = 2;
    private const int DatePartYear = 0;
    private const int DaysPer100Years = 0x8eac;
    private const int DaysPer400Years = 0x23ab1;
    private const int DaysPer4Years = 0x5b5;
    private const int DaysPerYear = 0x16d;
    private const int DaysTo10000 = 0x37b9db;
    private const int DaysTo1601 = 0x8eac4;
    private const int DaysTo1899 = 0xa9559;
    private static readonly int[] DaysToMonth365;
    private static readonly int[] DaysToMonth366;
    private const long DoubleDateOffset = 0x85103c0cb83c000L;
    private const long FileTimeOffset = 0x701ce1722770000L;
    private const ulong FlagsMask = 13835058055282163712L;
    private const ulong KindLocal = 9223372036854775808L;
    private const ulong KindLocalAmbiguousDst = 13835058055282163712L;
    private const int KindShift = 0x3e;
    private const ulong KindUnspecified = 0L;
    private const ulong KindUtc = 0x4000000000000000L;
    private const ulong LocalMask = 9223372036854775808L;
    private const long MaxMillis = 0x11efae44cb400L;
    internal const long MaxTicks = 0x2bca2875f4373fffL;
    public static readonly DateTime MaxValue;
    private const int MillisPerDay = 0x5265c00;
    private const int MillisPerHour = 0x36ee80;
    private const int MillisPerMinute = 0xea60;
    private const int MillisPerSecond = 0x3e8;
    internal const long MinTicks = 0L;
    public static readonly DateTime MinValue;
    private const double OADateMaxAsDouble = 2958466.0;
    private const double OADateMinAsDouble = -657435.0;
    private const long OADateMinAsTicks = 0x6efdddaec64000L;
    private const long TicksCeiling = 0x4000000000000000L;
    private const string TicksField = "ticks";
    private const ulong TicksMask = 0x3fffffffffffffffL;
    private const long TicksPerDay = 0xc92a69c000L;
    private const long TicksPerHour = 0x861c46800L;
    private const long TicksPerMillisecond = 0x2710L;
    private const long TicksPerMinute = 0x23c34600L;
    private const long TicksPerSecond = 0x989680L;

    // Methods
    static DateTime();
    public DateTime(long ticks);
    private DateTime(ulong dateData);
    public DateTime(long ticks, DateTimeKind kind);
    private DateTime(SerializationInfo info, StreamingContext context);
    public DateTime(int year, int month, int day);
    internal DateTime(long ticks, DateTimeKind kind, bool isAmbiguousDst);
    public DateTime(int year, int month, int day, Calendar calendar);
    public DateTime(int year, int month, int day, int hour, int minute, int second);
    public DateTime(int year, int month, int day, int hour, int minute, int second, DateTimeKind kind);
    public DateTime(int year, int month, int day, int hour, int minute, int second, Calendar calendar);
    public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond);
    public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, DateTimeKind kind);
    public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, Calendar calendar);
    public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, Calendar calendar, DateTimeKind kind);
    public DateTime Add(TimeSpan value);
    private DateTime Add(double value, int scale);
    public DateTime AddDays(double value);
    public DateTime AddHours(double value);
    public DateTime AddMilliseconds(double value);
    public DateTime AddMinutes(double value);
    public DateTime AddMonths(int months);
    public DateTime AddSeconds(double value);
    public DateTime AddTicks(long value);
    public DateTime AddYears(int value);
    public static int Compare(DateTime t1, DateTime t2);
    public int CompareTo(DateTime value);
    public int CompareTo(object value);
    private static long DateToTicks(int year, int month, int day);
    public static int DaysInMonth(int year, int month);
    internal static long DoubleDateToTicks(double value);
    public bool Equals(DateTime value);
    public override bool Equals(object value);
    public static bool Equals(DateTime t1, DateTime t2);
    public static DateTime FromBinary(long dateData);
    internal static DateTime FromBinaryRaw(long dateData);
    public static DateTime FromFileTime(long fileTime);
    public static DateTime FromFileTimeUtc(long fileTime);
    public static DateTime FromOADate(double d);
    private int GetDatePart(int part);
    public string[] GetDateTimeFormats();
    public string[] GetDateTimeFormats(char format);
    public string[] GetDateTimeFormats(IFormatProvider provider);
    public string[] GetDateTimeFormats(char format, IFormatProvider provider);
    public override int GetHashCode();
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern long GetSystemTimeAsFileTime();
    public TypeCode GetTypeCode();
    internal bool IsAmbiguousDaylightSavingTime();
    public bool IsDaylightSavingTime();
    public static bool IsLeapYear(int year);
    public static DateTime operator +(DateTime d, TimeSpan t);
    public static bool operator ==(DateTime d1, DateTime d2);
    public static bool operator >(DateTime t1, DateTime t2);
    public static bool operator >=(DateTime t1, DateTime t2);
    public static bool operator !=(DateTime d1, DateTime d2);
    public static bool operator <(DateTime t1, DateTime t2);
    public static bool operator <=(DateTime t1, DateTime t2);
    public static TimeSpan operator -(DateTime d1, DateTime d2);
    public static DateTime operator -(DateTime d, TimeSpan t);
    public static DateTime Parse(string s);
    public static DateTime Parse(string s, IFormatProvider provider);
    public static DateTime Parse(string s, IFormatProvider provider, DateTimeStyles styles);
    public static DateTime ParseExact(string s, string format, IFormatProvider provider);
    public static DateTime ParseExact(string s, string format, IFormatProvider provider, DateTimeStyles style);
    public static DateTime ParseExact(string s, string[] formats, IFormatProvider provider, DateTimeStyles style);
    public static DateTime SpecifyKind(DateTime value, DateTimeKind kind);
    public TimeSpan Subtract(DateTime value);
    public DateTime Subtract(TimeSpan value);
    bool IConvertible.ToBoolean(IFormatProvider provider);
    byte IConvertible.ToByte(IFormatProvider provider);
    char IConvertible.ToChar(IFormatProvider provider);
    DateTime IConvertible.ToDateTime(IFormatProvider provider);
    decimal IConvertible.ToDecimal(IFormatProvider provider);
    double IConvertible.ToDouble(IFormatProvider provider);
    short IConvertible.ToInt16(IFormatProvider provider);
    int IConvertible.ToInt32(IFormatProvider provider);
    long IConvertible.ToInt64(IFormatProvider provider);
    sbyte IConvertible.ToSByte(IFormatProvider provider);
    float IConvertible.ToSingle(IFormatProvider provider);
    object IConvertible.ToType(Type type, IFormatProvider provider);
    ushort IConvertible.ToUInt16(IFormatProvider provider);
    uint IConvertible.ToUInt32(IFormatProvider provider);
    ulong IConvertible.ToUInt64(IFormatProvider provider);
    [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]
    void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context);
    private static double TicksToOADate(long value);
    private static long TimeToTicks(int hour, int minute, int second);
    public long ToBinary();
    internal long ToBinaryRaw();
    public long ToFileTime();
    public long ToFileTimeUtc();
    public DateTime ToLocalTime();
    public string ToLongDateString();
    public string ToLongTimeString();
    public double ToOADate();
    public string ToShortDateString();
    public string ToShortTimeString();
    public override string ToString();
    public string ToString(IFormatProvider provider);
    public string ToString(string format);
    public string ToString(string format, IFormatProvider provider);
    public DateTime ToUniversalTime();
    internal static bool TryCreate(int year, int month, int day, int hour, int minute, int second, int millisecond, out DateTime result);
    public static bool TryParse(string s, out DateTime result);
    public static bool TryParse(string s, IFormatProvider provider, DateTimeStyles styles, out DateTime result);
    public static bool TryParseExact(string s, string[] formats, IFormatProvider provider, DateTimeStyles style, out DateTime result);
    public static bool TryParseExact(string s, string format, IFormatProvider provider, DateTimeStyles style, out DateTime result);

    // Properties
    public DateTime Date { get; }
    public int Day { get; }
    public DayOfWeek DayOfWeek { get; }
    public int DayOfYear { get; }
    public int Hour { get; }
    private ulong InternalKind { get; }
    private long InternalTicks { get; }
    public DateTimeKind Kind { get; }
    public int Millisecond { get; }
    public int Minute { get; }
    public int Month { get; }
    public static DateTime Now { get; }
    public int Second { get; }
    public long Ticks { get; }
    public TimeSpan TimeOfDay { get; }
    public static DateTime Today { get; }
    public static DateTime UtcNow { get; }
    public int Year { get; }
}

[Serializable, StructLayout(LayoutKind.Sequential), ComVisible(true)]
public struct TimeSpan : IComparable, IComparable<TimeSpan>, IEquatable<TimeSpan>
{
    public const long TicksPerMillisecond = 0x2710L;
    private const double MillisecondsPerTick = 0.0001;
    public const long TicksPerSecond = 0x989680L;
    private const double SecondsPerTick = 1E-07;
    public const long TicksPerMinute = 0x23c34600L;
    private const double MinutesPerTick = 1.6666666666666667E-09;
    public const long TicksPerHour = 0x861c46800L;
    private const double HoursPerTick = 2.7777777777777777E-11;
    public const long TicksPerDay = 0xc92a69c000L;
    private const double DaysPerTick = 1.1574074074074074E-12;
    private const int MillisPerSecond = 0x3e8;
    private const int MillisPerMinute = 0xea60;
    private const int MillisPerHour = 0x36ee80;
    private const int MillisPerDay = 0x5265c00;
    private const long MaxSeconds = 0xd6bf94d5e5L;
    private const long MinSeconds = -922337203685L;
    private const long MaxMilliSeconds = 0x346dc5d638865L;
    private const long MinMilliSeconds = -922337203685477L;
    public static readonly TimeSpan Zero;
    public static readonly TimeSpan MaxValue;
    public static readonly TimeSpan MinValue;
    internal long _ticks;
    public TimeSpan(long ticks);
    public TimeSpan(int hours, int minutes, int seconds);
    public TimeSpan(int days, int hours, int minutes, int seconds);
    public TimeSpan(int days, int hours, int minutes, int seconds, int milliseconds);
    public long Ticks { get; }
    public int Days { get; }
    public int Hours { get; }
    public int Milliseconds { get; }
    public int Minutes { get; }
    public int Seconds { get; }
    public double TotalDays { get; }
    public double TotalHours { get; }
    public double TotalMilliseconds { get; }
    public double TotalMinutes { get; }
    public double TotalSeconds { get; }
    public TimeSpan Add(TimeSpan ts);
    public static int Compare(TimeSpan t1, TimeSpan t2);
    public int CompareTo(object value);
    public int CompareTo(TimeSpan value);
    public static TimeSpan FromDays(double value);
    public TimeSpan Duration();
    public override bool Equals(object value);
    public bool Equals(TimeSpan obj);
    public static bool Equals(TimeSpan t1, TimeSpan t2);
    public override int GetHashCode();
    public static TimeSpan FromHours(double value);
    private static TimeSpan Interval(double value, int scale);
    public static TimeSpan FromMilliseconds(double value);
    public static TimeSpan FromMinutes(double value);
    public TimeSpan Negate();
    public static TimeSpan Parse(string s);
    public static bool TryParse(string s, out TimeSpan result);
    public static TimeSpan FromSeconds(double value);
    public TimeSpan Subtract(TimeSpan ts);
    public static TimeSpan FromTicks(long value);
    internal static long TimeToTicks(int hour, int minute, int second);
    private string IntToString(int n, int digits);
    public override string ToString();
    public static TimeSpan operator -(TimeSpan t);
    public static TimeSpan operator -(TimeSpan t1, TimeSpan t2);
    public static TimeSpan operator +(TimeSpan t);
    public static TimeSpan operator +(TimeSpan t1, TimeSpan t2);
    public static bool operator ==(TimeSpan t1, TimeSpan t2);
    public static bool operator !=(TimeSpan t1, TimeSpan t2);
    public static bool operator <(TimeSpan t1, TimeSpan t2);
    public static bool operator <=(TimeSpan t1, TimeSpan t2);
    public static bool operator >(TimeSpan t1, TimeSpan t2);
    public static bool operator >=(TimeSpan t1, TimeSpan t2);
    static TimeSpan();
    // Nested Types
    [StructLayout(LayoutKind.Sequential)]
    private struct StringParser
    {
        private string str;
        private char ch;
        private int pos;
        private int len;
        private ParseError error;
        internal void NextChar();
        internal char NextNonDigit();
        internal long Parse(string s);
        internal bool TryParse(string s, out long value);
        internal bool ParseInt(int max, out int i);
        internal bool ParseTime(out long time);
        internal void SkipBlanks();
        // Nested Types
        private enum ParseError
        {
            ArgumentNull = 4,
            Format = 1,
            Overflow = 2,
            OverflowHoursMinutesSeconds = 3
        }
    }
}

7条答案

按热度按时间

lvjbypge1#

你也许可以使用DateTime。DateTime.Ticks的分辨率是100纳秒。你可以用DateTime.AddTicks设置刻度。

赞(0）回复(0）举报 2022-11-26

o3imoua42#

jmp7cifd3#

如果我真的需要比DateTime提供的100 ns分辨率更高的精度，我会考虑创建一个包含DateTime和一个整数值的结构：

public struct HiResDateTime
{
    public HiResDateTime(DateTime dateTime, int nanoseconds)
    {
        if (nanoSeconds < 0 || nanoSeconds > 99) 
            throw new ArgumentOutOfRangeException(...);
        DateTime = dateTime;
        Nanoseconds = nanoseconds;
    }

    ... possibly other constructors including one that takes a timestamp parameter
    ... in the format provided by the instruments.

    public DateTime DateTime { get; private set; }
    public int Nanoseconds { get; private set; }

    ... implementation ...
}

然后实施所需的任何内容，例如：

比较（先比较DateTime，然后比较Nanoseconds）
ToString()，例如，将日期时间格式设置为100 ns精度，然后附加纳秒。
转换为DateTime/从DateTime转换为DateTime
加/减（可能需要类似的HiResTimeSpan）...等....

pdsfdshx4#

iih3973s5#

我也在为同样的问题而挣扎，因为我有一个项目，我有皮秒分辨率的时间戳。我的源数据是“time_t”格式的，即自epoch以来的秒数+皮秒+ UTC偏移量。
我找到的最好的解决方案是使用“decimal seconds since epoch in UTC”作为我的内部时间格式，并且只使用DateTime作为一个漂亮的打印对象，以提取高达1秒分辨率的语言环境/格式，然后手动操作字符串以包括小数秒。

cnh2zyt36#

在.NET 7中，您可以顺便使用DateTime.Microsecond和/或DateTime.Nanosecond属性，而无需创建自己的扩展方法，但它们 * 仍然 * 提供与Ticks相同的精度。
在.NET 7之前，各种日期和时间结构中可用的最小时间增量是Ticks属性中可用的“tick”。作为参考，一个tick是100 ns。开发人员传统上必须对“tick”值执行计算，以确定微秒和纳秒值。在.NET 7中，我们在日期和时间实现中引入了微秒和纳秒。

dwbf0jvd7#

你可以用不同的方式来卷你自己的。
1.)使用System.Decimal字段创建一个结构作为“后备存储”。
2.)使用System.Numerics.BigInteger作为支持创建一个结构。
Package 方法以使用System.DateTime方便的“部件”（年、月、日...），包括您自己的纳秒、皮秒、飞秒等属性和方法。

仅供参考：

日期时间最大值刻度：3,155,378,975,999,999,999
小数。最大值：79,228,162,514,264,337,593,543,950,335
大整数：任意大！

.net 是否有可供CLR使用的高分辨率(微秒、纳秒)DateTime对象？

7条答案

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