blocks|key|1978618|text|使用Stopwatch类。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1978619|1978620|提供了一组方法和属性，您可以使用这些方法和属性准确地测量运行时间。|blockquote|1978621|1978622|1978623|这里有一些关于实现它的好信息：|1978624|Performance+Tests:+Precise+Run+Time+Measurements+with+System.Diagnostics.Stopwatch|1978625|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx|1|http://www.codeproject.com/KB/testing/stopwatch-measure-precise.aspx^0|2|9|2|9|0|0|0|0|0|0|0|0|2A|1|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@$9|12|A|13|1|14]]|E|$]]|$1|F|3|-4|5|6|7|15|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|16|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|17|8|@]|D|@]|E|$]]|$1|K|3|-4|5|6|7|18|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|19|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1A|8|@]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|P|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|Q|$R|$5|S|T|U|E|$V|W]]|X|$5|S|T|U|E|$V|Y]]]]

Use the <a href="http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx" rel="noreferrer"><code>Stopwatch</code></a> class.

<blockquote>
 Provides a set of methods and
 properties that you can use to
 accurately measure elapsed time.
</blockquote>

There is some good info on implementing it here:

<a href="http://www.codeproject.com/KB/testing/stopwatch-measure-precise.aspx" rel="noreferrer">Performance Tests: Precise Run Time Measurements with System.Diagnostics.Stopwatch</a>

blocks|key|1974051|text|long+milliseconds+=+DateTime.Now.Ticks+/+TimeSpan.TicksPerMillisecond;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1974052|这实际上是各种Unix转换方法在DateTimeOffset类(.NET框架4.6%2B、.NET标准1.3%2B)中的实现方式：|unstyled|offset|length|style|CODE|1974053|long+milliseconds+=+DateTimeOffset.Now.ToUnixTimeMilliseconds();|1974054|entityMap|0|LINK|mutability|MUTABLE|url|http://referencesource.microsoft.com/#mscorlib/system/datetimeoffset.cs^0|0|G|E|G|E|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|V|8|@$G|W|H|X|I|J]]|9|@$G|Y|H|Z|1|10]]|A|$]]|$1|K|3|L|5|6|7|11|8|@]|9|@]|A|$B|C]]|$1|M|3|-4|5|F|7|12|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

<pre><code>long milliseconds = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
</code></pre>

This is actually how the various Unix conversion methods are implemented in the <a href="http://referencesource.microsoft.com/#mscorlib/system/datetimeoffset.cs" rel="noreferrer"><code>DateTimeOffset</code></a> class (.NET Framework 4.6+, .NET Standard 1.3+):

<pre><code>long milliseconds = DateTimeOffset.Now.ToUnixTimeMilliseconds();
</code></pre>

blocks|key|1231653|text|DateTime.Ticks属性获取表示日期和时间的刻度数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1231654|10,000滴答是一毫秒(每秒10,000,000滴答)。|1231655|entityMap^0|0|E|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

The <code>DateTime.Ticks</code> property gets the number of ticks that represent the date and time.

10,000 Ticks is a millisecond (10,000,000 ticks per second).

blocks|key|3424599|text|我使用下面的类。我在网上找到过一次，被认为是现在最好的()。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3424600|///+<summary>Class+to+get+current+timestamp+with+enough+precision</summary>
static+class+CurrentMillis
{
++++private+static+readonly+DateTime+Jan1St1970+=+new+DateTime+(1970,+1,+1,+0,+0,+0,+DateTimeKind.Utc);
++++///+<summary>Get+extra+long+current+timestamp</summary>
++++public+static+long+Millis+{+get+{+return+(long)((DateTime.UtcNow+-+Jan1St1970).TotalMilliseconds);+}+}
}|code-block|syntax|javascript|3424601|来源未知。|3424602|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I use the following class. I found it on the Internet once, postulated to be the best NOW().

<pre><code>/// &lt;summary&gt;Class to get current timestamp with enough precision&lt;/summary&gt;
static class CurrentMillis
{
 private static readonly DateTime Jan1St1970 = new DateTime (1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
 /// &lt;summary&gt;Get extra long current timestamp&lt;/summary&gt;
 public static long Millis { get { return (long)((DateTime.UtcNow - Jan1St1970).TotalMilliseconds); } }
}
</code></pre>

Source unknown.

blocks|key|3424520|text|您可以尝试使用QueryPerformanceCounter原生方法。有关详细信息，请参阅http://www.pinvoke.net/default.aspx/kernel32/QueryPerformanceCounter.html。这就是Stopwatch类所使用的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3424521|有关详细信息，请参阅How+to+get+timestamp+of+tick+precision+in+.NET+/+C#?。|3424522|Stopwatch.GetTimestamp()提供对此方法的访问：|3424523|public+static+long+GetTimestamp()+{
+++++if(IsHighResolution)+{
+++++++++long+timestamp+=+0;
+++++++++SafeNativeMethods.QueryPerformanceCounter(out+timestamp);
+++++++++return+timestamp;
+++++}
+++++else+{
+++++++++return+DateTime.UtcNow.Ticks;
+++++}
+}|code-block|syntax|javascript|3424524|entityMap|0|LINK|mutability|MUTABLE|url|http://www.pinvoke.net/default.aspx/kernel32/QueryPerformanceCounter.html|1|https://stackoverflow.com/questions/1416139/how-to-get-timestamp-of-tick-precision-in-net-c^0|7|N|3E|9|19|21|0|0|A|1G|1|0|0|O|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|6|7|16|8|@]|D|@$9|17|A|18|1|19]]|E|$]]|$1|H|3|I|5|6|7|1A|8|@$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1D|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|X]]]]

You can try the <code>QueryPerformanceCounter</code> native method. See <a href="http://www.pinvoke.net/default.aspx/kernel32/QueryPerformanceCounter.html" rel="nofollow noreferrer">http://www.pinvoke.net/default.aspx/kernel32/QueryPerformanceCounter.html</a> for more information. This is what the <code>Stopwatch</code> class uses.

See <a href="https://stackoverflow.com/questions/1416139/how-to-get-timestamp-of-tick-precision-in-net-c">How to get timestamp of tick precision in .NET / C#?</a> for more information.

<code>Stopwatch.GetTimestamp()</code> gives access to this method:

<pre><code>public static long GetTimestamp() {
 if(IsHighResolution) {
 long timestamp = 0;
 SafeNativeMethods.QueryPerformanceCounter(out timestamp);
 return timestamp;
 }
 else {
 return DateTime.UtcNow.Ticks;
 }
 }
</code></pre>

blocks|key|3424565|text|我使用了DateTime.Now.TimeOfDay.TotalMilliseconds+(适用于今天)，希望它也能帮到你。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3424566|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I used DateTime.Now.TimeOfDay.TotalMilliseconds (for current day), hope it helps you out as well.

blocks|key|1229281|text|使用System.DateTime.Now.ToUniversalTime()。这使你的读数以已知的基于引用的毫秒格式，完全消除了日期变化，等等。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1229282|entityMap^0|2|11|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Use <code>System.DateTime.Now.ToUniversalTime()</code>. That puts your reading in a known reference-based millisecond format that totally eliminates day change, etc.

blocks|key|4836154|text|使用秒表类，我们可以在System.Diagnostics中实现它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4836155|Stopwatch+stopwatch++=+new+Stopwatch();
stopwatch.Start();
stopwatch.Stop();
Debug.WriteLine(stopwatch.ElapsedMilliseconds);|code-block|syntax|javascript|4836156|entityMap^0|B|I|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Using Stopwatch class we can achieve it from <code>System.Diagnostics</code>.
<pre><code>Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
stopwatch.Stop();
Debug.WriteLine(stopwatch.ElapsedMilliseconds);
</code></pre>

blocks|key|1229315|text|System.DateTimeOffset.Now.ToString("MM/dd/yyyy+hh:mm:ss.fff+tt")获取毫秒数，格式为'04/01/2021+04:32:14.788+PM‘|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|1229316|https://docs.microsoft.com/en-us/dotnet/standard/base-types/how-to-display-milliseconds-in-date-and-time-values|1229317|entityMap|0|LINK|mutability|MUTABLE|url^0|0|1S|2M|3|0|0|33|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|U|8|@]|E|@$9|V|A|W|1|X]]|F|$]]|$1|I|3|-4|5|6|7|Y|8|@]|E|@]|F|$]]]|J|$K|$5|L|M|N|F|$O|H]]]]

<code>System.DateTimeOffset.Now.ToString(&quot;MM/dd/yyyy hh:mm:ss.fff tt&quot;)</code> to get the millisecond in the format of '04/01/2021 04:32:14.788 PM'
<a href="https://docs.microsoft.com/en-us/dotnet/standard/base-types/how-to-display-milliseconds-in-date-and-time-values" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/dotnet/standard/base-types/how-to-display-milliseconds-in-date-and-time-values</a>

blocks|key|3424711|text|据我所知，您的需求是Environment.TickCount符合要求。它返回自启动以来的毫秒数，因此它总是增加，并可用于计算以毫秒为单位的运行时间。如果你还想要绝对时间，你可以获得当前时间和当前Environment.TickCount，并根据它和新的Environment.TickCount计算新的绝对时间。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3424712|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.environment.tickcount^0|A|L|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

As I understand your requirements <a href="https://docs.microsoft.com/en-us/dotnet/api/system.environment.tickcount" rel="nofollow noreferrer">Environment.TickCount</a> fits the bill. It returns number of milliseconds since startup, so it always increases and can be used for computing elapsed time in milliseconds. If you want absolute time also, you can get current time and current Environment.TickCount, and compute new absolute time based on that and new Environment.TickCount.

I'm making a program in which I need to get the time in milliseconds. By time, I mean a number that is never equal to itself, and is always 1000 numbers bigger than it was a second ago. I've tried converting <code>DateTime.Now</code> to a <code>TimeSpan</code> and getting the <code>TotalMilliseconds</code> from that... but I've heard it isn't perfectly accurate.

Is there an easier way to do this?

Get time in milliseconds using C#

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在编写一个程序，其中我需要获取以毫秒为单位的时间。所谓时间，我指的是一个永远不会等于它自己的数字，而且总是比一秒前大1000个数字。我曾尝试将DateTime.Now转换为TimeSpan，并从中获取TotalMilliseconds ...但我听说它并不完全准确。有没有更简单的方法来做这件事？

问使用C#获取时间(以毫秒为单位
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