blocks|key|1728387|text|System.Timers.Timer|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1728388|正如MagicKat所说：|1728389|System.Threading.Timer|1728390|你可以在这里看到区别：http://intellitect.com/system-windows-forms-timer-vs-system-threading-timer-vs-system-timers-timer/|offset|length|1728391|你可以在这里看到MSDN的例子：|1728392|http://msdn.microsoft.com/en-us/library/system.timers.timer(VS.80).aspx|1728393|还有这里：|1728394|http://msdn.microsoft.com/en-us/library/system.threading.timer(VS.80).aspx|1728395|entityMap|0|LINK|mutability|MUTABLE|url|http://intellitect.com/system-windows-forms-timer-vs-system-threading-timer-vs-system-timers-timer/|1|2^0|0|0|0|B|2R|0|0|0|0|1Z|1|0|0|0|22|2|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|14|8|@]|9|@$H|15|I|16|1|17]]|A|$]]|$1|J|3|K|5|6|7|18|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|19|8|@]|9|@$H|1A|I|1B|1|1C]]|A|$]]|$1|N|3|O|5|6|7|1D|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1E|8|@]|9|@$H|1F|I|1G|1|1H]]|A|$]]|$1|R|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|S|$T|$5|U|V|W|A|$X|Y]]|Z|$5|U|V|W|A|$X|M]]|10|$5|U|V|W|A|$X|Q]]]]

System.Timers.Timer

And as MagicKat says:

System.Threading.Timer

You can see the differences here:
<a href="http://intellitect.com/system-windows-forms-timer-vs-system-threading-timer-vs-system-timers-timer/" rel="noreferrer">http://intellitect.com/system-windows-forms-timer-vs-system-threading-timer-vs-system-timers-timer/</a>

And you can see MSDN examples here: 

<a href="http://msdn.microsoft.com/en-us/library/system.timers.timer(VS.80).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/system.timers.timer(VS.80).aspx</a>

And here:

<a href="http://msdn.microsoft.com/en-us/library/system.threading.timer(VS.80).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/system.threading.timer(VS.80).aspx</a>

blocks|key|1728492|text|我推荐System.Timers名称空间中的Timer类。同样值得关注的是System.Threading名称空间中的Timer类。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1728493|using+System;
using+System.Timers;

public+class+Timer1
{
++++private+static+Timer+aTimer+=+new+System.Timers.Timer(10000);

++++public+static+void+Main()
++++{
++++++++aTimer.Elapsed+%2B=+new+ElapsedEventHandler(OnTimedEvent);
++++++++aTimer.Enabled+=+true;

++++++++Console.WriteLine("Press+the+Enter+key+to+exit+the+program.");
++++++++Console.ReadLine();
++++}

++++//+Specify+what+you+want+to+happen+when+the+Elapsed+event+is+
++++//+raised.
++++private+static+void+OnTimedEvent(object+source,+ElapsedEventArgs+e)
++++{
++++++++Console.WriteLine("The+Elapsed+event+was+raised+at+{0}",+e.SignalTime);
++++}
}|code-block|syntax|javascript|1728494|来自MSDN文档的示例。|1728495|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.timers.aspx|1|http://msdn.microsoft.com/en-us/library/system.timers.timer.aspx|2|http://msdn.microsoft.com/en-us/library/system.threading.timer.aspx|3^0|3|D|M|5|11|G|1N|5|3|D|0|M|5|1|11|G|2|1N|5|3|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|C]|$9|16|A|17|B|C]]|D|@$9|18|A|19|1|1A]|$9|1B|A|1C|1|1D]|$9|1E|A|1F|1|1G]|$9|1H|A|1I|1|1J]]|E|$]]|$1|F|3|G|5|H|7|1K|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1L|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]|W|$5|P|Q|R|E|$S|X]]|Y|$5|P|Q|R|E|$S|X]]]]

I would recommend the <a href="http://msdn.microsoft.com/en-us/library/system.timers.timer.aspx" rel="noreferrer"><code>Timer</code></a> class in the <a href="http://msdn.microsoft.com/en-us/library/system.timers.aspx" rel="noreferrer"><code>System.Timers</code></a> namespace. Also of interest, the <a href="http://msdn.microsoft.com/en-us/library/system.threading.timer.aspx" rel="noreferrer"><code>Timer</code></a> class in the <a href="http://msdn.microsoft.com/en-us/library/system.threading.timer.aspx" rel="noreferrer"><code>System.Threading</code></a> namespace.

<pre><code>using System;
using System.Timers;

public class Timer1
{
 private static Timer aTimer = new System.Timers.Timer(10000);

 public static void Main()
 {
 aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
 aTimer.Enabled = true;

 Console.WriteLine("Press the Enter key to exit the program.");
 Console.ReadLine();
 }

 // Specify what you want to happen when the Elapsed event is 
 // raised.
 private static void OnTimedEvent(object source, ElapsedEventArgs e)
 {
 Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime);
 }
}
</code></pre>

Example from MSDN docs.

blocks|key|1728532|text|System.Diagnostics.Stopwatch如果你的目标是计算某件事的运行时间|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1728533|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx^0|0|S|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]]]]

<a href="http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx" rel="nofollow noreferrer">System.Diagnostics.Stopwatch</a> if your goal is to time how long something takes to run

blocks|key|1513432|text|建议不要使用System.Timer的Timer类。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1513433|entityMap^0|6|C|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|$]]

It is recommended to not to use <code>System.Timer</code>'s Timer class.

blocks|key|1513509|text|据我所知，至少还有System.Timers.Timer和System.Threading.Timer类。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1513510|但有一件事需要注意(如果你以前还没有这样做过)，假设你已经在你的using子句中有了System.Threading命名空间，但是你实际上想要在System.Timers中使用计时器，你需要这样做：|1513511|using+System.Threading;
using+Timer+=+System.Timers.Timer;|code-block|syntax|javascript|1513512|Jon+Skeet在他的多线程指南中有一篇关于定时器的文章，非常值得一读：http://www.yoda.arachsys.com/csharp/threads/timers.shtml|1513513|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.timers.timer.aspx|1|http://msdn.microsoft.com/en-us/library/system.threading.timer.aspx|2|http://www.yoda.arachsys.com/csharp/threads/timers.shtml^0|9|J|0|T|M|1|0|0|0|11|1K|2|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]|$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|16|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|17|8|@]|9|@$A|18|B|19|1|1A]]|C|$]]|$1|M|3|-4|5|6|7|1B|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]|W|$5|P|Q|R|C|$S|X]]]]

There are at least the <a href="http://msdn.microsoft.com/en-us/library/system.timers.timer.aspx" rel="noreferrer">System.Timers.Timer</a> and <a href="http://msdn.microsoft.com/en-us/library/system.threading.timer.aspx" rel="noreferrer">System.Threading.Timer</a> classes that I'm aware of. 

One thing to watch out though (if you haven't done this before already), say if you already have the System.Threading namespace in your using clause already but you actually want to use the timer in System.Timers you need to do this:

<pre><code>using System.Threading;
using Timer = System.Timers.Timer;
</code></pre>

Jon Skeet has an article just on Timers in his multithreading guide, it's well worth a read:
<a href="http://www.yoda.arachsys.com/csharp/threads/timers.shtml" rel="noreferrer">http://www.yoda.arachsys.com/csharp/threads/timers.shtml</a>

blocks|key|1728755|text|这个问题由来已久，现有的答案很好地涵盖了当时的问题。与此同时，一些新的事情发生了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1728756|定时器，当然，用来干嘛？|1728757|使用定时器是一种以某种延迟和/或规则间隔运行某些处理的方式。有两种情况：|1728758|(1)只是周期性地运行一些简短的代码，没有任何线程问题，没有麻烦，没有混乱。如果普通的Windows+Forms计时器不适合，那么具有SynchronizingObject属性的System.Timers.Timer使其比System.Threading.Timer更简单。|offset|length|style|CODE|1728759|(2)您正在编写的代码属于异步并发处理领域。传统上，无论使用什么普通计时器，这种方法都容易出错，很难调试，也很难保证正确。|1728760|在第二种情况下，你可能会用传统的方法逃脱惩罚，但要注意，复杂性正在潜伏，并准备好吞噬你，不只是一次，而是任何时候你只是没有做出最好的选择，并会产生累积的影响。|1728761|现在我们有了更好的东西|1728762|如果您的情况涉及某种“事件”处理(无论其编码方式是什么:按键、鼠标按钮、来自串行端口的字节、来自网络连接的字节、来自测量值的字节，等等)，那么您应该考虑反应式编程。|1728763|近年来，反应式编程以某种方式揭示了如何针对这些情况进行编码，同时又不会落入复杂性陷阱。|1728764|因此，从技术上讲，下面的链接是对这个问题的回答:它是一个计时器，它位于System.Reactive.Linq名称空间中：Observable.Timer+Method+(System.Reactive.Linq)|1728765|公平地说，它是一个计时器，它与响应式编程思维和许多改变游戏规则的东西配合得很好。然而，它可能是也可能不是最好的工具，这取决于上下文。|1728766|由于此问题是以.NET为中心的，因此您可能会对Good+introduction+to+the+.NET+Reactive+Framework感兴趣|1728767|或者对于一个清晰的、图文并茂的、更通用的(不是以微软为中心的)文档来说，这似乎是一个很好的The+introduction+to+Reactive+Programming+you've+been+missing。|1728768|entityMap|0|LINK|mutability|MUTABLE|url|https://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.timer(v=vs.103).aspx|1|https://stackoverflow.com/questions/1596158/good-introduction-to-the-net-reactive-framework|2|https://gist.github.com/staltz/868e7e9bc2a7b8c1f754^0|0|0|0|1V|J|2H|J|33|M|0|0|0|0|0|0|Z|K|1P|1A|0|0|0|N|1C|1|0|19|1O|2|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1G|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1H|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1I|8|@$H|1J|I|1K|J|K]|$H|1L|I|1M|J|K]|$H|1N|I|1O|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1P|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1R|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1S|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1T|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1U|8|@$H|1V|I|1W|J|K]]|9|@$H|1X|I|1Y|1|1Z]]|A|$]]|$1|X|3|Y|5|6|7|20|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|21|8|@]|9|@$H|22|I|23|1|24]]|A|$]]|$1|11|3|12|5|6|7|25|8|@]|9|@$H|26|I|27|1|28]]|A|$]]|$1|13|3|-4|5|6|7|29|8|@]|9|@]|A|$]]]|14|$15|$5|16|17|18|A|$19|1A]]|1B|$5|16|17|18|A|$19|1C]]|1D|$5|16|17|18|A|$19|1E]]]]

This question is old and existing answers cover well the issue as it was at the time. In the meantime, something new has happened.

<h2>Timer, sure, for what ?</h2>

Using a timer is a way to run some processing with some delay and/or at regular interval. There are two cases:

(1) it's just to run some short code periodically without any thread concern, no trouble, no mess. If the plain Windows Forms timer is not suitable, then <code>System.Timers.Timer</code> with its <code>SynchronizingObject</code> property makes it more straightforward than <code>System.Threading.Timer</code> .

(2) what you're coding is in the realm of asynchronous concurrent processing. That has traditionally been error-prone, difficult to debug, to get right, whatever the plain timer used.

In case 2 you might get away with traditional approach, but beware, complexity is lurking and ready to eat you not just once but any time you just don't make the best choice, with cumulative effects.

<h2>Now we've got something better</h2>

If your situation deals with some kind of "event" handling (whatever the way it's coded: keypresses, mouse buttons, bytes from a serial port, from a network connection, from measurements, etc), you should consider Reactive Programming.

Reactive Programming has in recent years somehow uncovered how to code for these situations, while not falling into complexity traps.

So, technically the following link is an answer to the question: it is a timer which is in the <code>System.Reactive.Linq</code> namespace: <a href="https://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.timer(v=vs.103).aspx" rel="nofollow noreferrer">Observable.Timer Method (System.Reactive.Linq)</a>

To be fair, it's a timer that comes and plays well with the Reactive Programming mindset and a lot of game-changing stuff. Yet it might or might not be the best tool, depending on the context.

Since this question is .NET-centric, you might be interested in <a href="https://stackoverflow.com/questions/1596158/good-introduction-to-the-net-reactive-framework">Good introduction to the .NET Reactive Framework</a>

Or for a clear, illustrated, more general (not Microsoft-centric) document, this seems good <a href="https://gist.github.com/staltz/868e7e9bc2a7b8c1f754" rel="nofollow noreferrer">The introduction to Reactive Programming you've been missing</a>.

I want to use a timer in my simple <a href="http://en.wikipedia.org/wiki/.NET_Framework" rel="nofollow noreferrer">.NET</a> application written in C#. The only one I can find is the Windows.Forms.Timer class. I don't want to reference this namespace just for my console application. 

Is there a C# timer (or timer like) class for use in console applications?

Is there a timer class in C# that isn't in the Windows.Forms namespace?

Windows

我想在用C#编写的简单应用程序中使用计时器。我唯一能找到的是Windows.Forms.Timer类。我不想只为我的控制台应用程序引用这个名称空间。是否有用于控制台应用程序的C# timer (或类似timer )类？

问C#中是否有不在Windows.Forms名称空间中的timer类？
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