blocks|key|2473128|text|你会发现，如果你检查了前面的一些问题，那么你将很难用你的计时器来获得准确性。以下是前面几个问题的一个小样本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2473129|2473130|Timer+takes+10+ms+more+than+interval+|unordered-list-item|offset|length|2473131|C#+Why+are+timer+frequencies+extremely+off?|2473132|.NET,+event+every+minute+(on+the+minute).+Is+a+timer+the+best+option?+|2473133|2473134|这是another+previous+question，它可能会为您提供一些帮助。|2473135|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/2989350/timer-takes-10-ms-more-than-interval/2989554#2989554|1|https://stackoverflow.com/questions/416522/c-why-are-timer-frequencies-extremely-off/416688#416688|2|https://stackoverflow.com/questions/1329900/net-event-every-minute-on-the-minute-is-a-timer-the-best-option/1329925#1329925|3|https://stackoverflow.com/questions/1416803/system-timers-timer-vs-system-threading-timer^0|0|0|0|10|0|0|0|17|1|0|0|1X|2|0|0|2|P|3|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|14|8|@]|9|@$F|15|G|16|1|17]]|A|$]]|$1|H|3|I|5|E|7|18|8|@]|9|@$F|19|G|1A|1|1B]]|A|$]]|$1|J|3|K|5|E|7|1C|8|@]|9|@$F|1D|G|1E|1|1F]]|A|$]]|$1|L|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1H|8|@]|9|@$F|1I|G|1J|1|1K]]|A|$]]|$1|O|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]|Y|$5|R|S|T|A|$U|Z]]|10|$5|R|S|T|A|$U|11]]]]

You will find if you check some of the previous questions on SO, you are going to have a very hard time getting accuracy with your timer. Here is a small sample of previous questions:

<ul>
<li><a href="https://stackoverflow.com/questions/2989350/timer-takes-10-ms-more-than-interval/2989554#2989554">Timer takes 10 ms more than interval</a> </li>
<li><a href="https://stackoverflow.com/questions/416522/c-why-are-timer-frequencies-extremely-off/416688#416688">C# Why are timer frequencies extremely off?</a></li>
<li><a href="https://stackoverflow.com/questions/1329900/net-event-every-minute-on-the-minute-is-a-timer-the-best-option/1329925#1329925">.NET, event every minute (on the minute). Is a timer the best option?</a> </li>
</ul>

Here is <a href="https://stackoverflow.com/questions/1416803/system-timers-timer-vs-system-threading-timer">another previous question</a> which may provide you some help.

blocks|key|5815357|text|你想要的精度是多少？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5815358|如果你说1ms是足够精确的(或者10，或者100)，你总是可以做一个循环，将当前时间与前一次迭代中保存的时间进行比较，并在当前时间值的秒值发生变化时启动一个线程……|5815359|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

What would be your desired precision ?

If you say that 1ms is precise enough (or 10, or 100), you could always do a loop which compares the current time and one saved from the previous iteration, and start a thread when the seconds value of the current time value changes...

blocks|key|2473154|text|您可以使用一些调度库，如Quartz.net，它提供了示例并易于使用：http://quartznet.sourceforge.net/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2473155|entityMap|0|LINK|mutability|MUTABLE|url|http://quartznet.sourceforge.net/^0|Z|X|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]]]]

You can use some schedule libraries, like Quartz.net, it provides examples and easy to use:
<a href="http://quartznet.sourceforge.net/" rel="nofollow noreferrer">http://quartznet.sourceforge.net/</a>

blocks|key|561957|text|这段代码使用System.Threading.Timer。它将查看触发器被调用的毫秒偏移量。如果误差超出可接受的范围，它将重新调整计时器，并通过平均每个节拍的误差来校正间隔。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|561958|class+Program+{
++++const+int+MAX_ERROR_IN_MILLISECONDS+=+20;
++++const+int+ONE_SECOND+=+1000;
++++const+int+HALF_SECOND+=+ONE_SECOND+/+2;

++++private+static+System.Threading.Timer+timer;

++++static+void+Main(string[]+args)+{

++++++++timer+=+new+System.Threading.Timer(Tick);

++++++++timer.Change(ONE_SECOND+-+DateTime.Now.Millisecond,+ONE_SECOND);
++++++++Console.ReadLine();
++++}

++++private+static+int+ticksSynced+=+0;
++++private+static+int+currInterval+=+ONE_SECOND;
++++private+static+void+Tick(object+s)+{
++++++++var+ms+=+DateTime.UtcNow.Millisecond;
++++++++var+diff+=+ms+>+HALF_SECOND+?+ms+-+ONE_SECOND+:+ms;
++++++++if+(Math.Abs(diff)+<+MAX_ERROR_IN_MILLISECONDS)+{
++++++++++++//+still+synced
++++++++++++ticksSynced%2B%2B;
++++++++}+else+{
++++++++++++//+Calculate+new+interval
++++++++++++currInterval+-=+diff+/+ticksSynced;
++++++++++++timer.Change(ONE_SECOND+-+ms,+currInterval);
++++++++++++Console.WriteLine("New+interval:+{0};+diff:+{1};+ticks:+{2}",+currInterval,+diff,+ticksSynced);
++++++++++++ticksSynced+=+0;
++++++++}
++++++++Console.WriteLine(ms);
++++}
}|code-block|syntax|javascript|561959|正如您所看到的，您不能在Windows中的第二次更改时准确地触发。你可以试着靠近。|561960|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|$]]

This code uses a System.Threading.Timer. It will look at the millisecond-offset the trigger is called. If the error is outside the accepted range, it will re-adjust the timer and it will correct the interval by averaging the error per tick.

<pre><code>class Program {
 const int MAX_ERROR_IN_MILLISECONDS = 20;
 const int ONE_SECOND = 1000;
 const int HALF_SECOND = ONE_SECOND / 2;

 private static System.Threading.Timer timer;

 static void Main(string[] args) {

 timer = new System.Threading.Timer(Tick);

 timer.Change(ONE_SECOND - DateTime.Now.Millisecond, ONE_SECOND);
 Console.ReadLine();
 }

 private static int ticksSynced = 0;
 private static int currInterval = ONE_SECOND;
 private static void Tick(object s) {
 var ms = DateTime.UtcNow.Millisecond;
 var diff = ms &gt; HALF_SECOND ? ms - ONE_SECOND : ms;
 if (Math.Abs(diff) &lt; MAX_ERROR_IN_MILLISECONDS) {
 // still synced
 ticksSynced++;
 } else {
 // Calculate new interval
 currInterval -= diff / ticksSynced;
 timer.Change(ONE_SECOND - ms, currInterval);
 Console.WriteLine("New interval: {0}; diff: {1}; ticks: {2}", currInterval, diff, ticksSynced);
 ticksSynced = 0;
 }
 Console.WriteLine(ms);
 }
}
</code></pre>

As you can see, you cannot trigger exactly on the second change in Windows. You can try to get close.

In C# how to create a timer that synchronize with tick of system DateTime. custom timer should tick whenever the seconds change for DateTime.Now

C# timer synchronized with Datetime.Now

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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在C#中如何创建一个与系统DateTime时钟同步的定时器。每当DateTime.Now的秒数发生变化时，自定义计时器应滴答作响

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