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作用:每隔多久去执行线程里的方法. class ThreadTimerDemo { static void Main(string[] args) { // Create an AutoResetEvent to signal the timeout threshold in the // timer callback has been reached. var autoEvent = new AutoResetEvent(false); var statusChecker = new StatusChecker(10); // Create a timer that invokes CheckStatus after one second, // and every 1/4 second thereafter. Console.WriteLine("{0:h:mm:ss.fff} Creating timer.\n", DateTime.Now); var stateTimer = new Timer(statusChecker.CheckStatus, autoEvent, 1000, 250); // When autoEvent signals, change the period to every half second. autoEvent.WaitOne(); stateTimer.Change(0, 500); Console.WriteLine("\nChanging period to .5 seconds.\n"); // When autoEvent signals the second time, dispose of the timer. autoEvent.WaitOne(); stateTimer.Change(0, 1000); Console.WriteLine("\nChanging period to 1 seconds.\n"); autoEvent.WaitOne(); stateTimer.Dispose(); Console.WriteLine("\nDestroying timer."); Console.ReadKey(); } class StatusChecker { private int invokeCount; private int maxCount; public StatusChecker(int count) { invokeCount = 0; maxCount = count; } // This method is called by the timer delegate. public void CheckStatus(Object stateInfo) { AutoResetEvent autoEvent = (AutoResetEvent)stateInfo; Console.WriteLine("{0} Checking status {1,2}.", DateTime.Now.ToString("h:mm:ss.fff"), (++invokeCount).ToString()); if (invokeCount == maxCount) { // Reset the counter and signal the waiting thread. invokeCount = 0; autoEvent.Set(); } } } } // The example displays output like the following: // 11:59:54.202 Creating timer. // // 11:59:55.217 Checking status 1. // 11:59:55.466 Checking status 2. // 11:59:55.716 Checking status 3. // 11:59:55.968 Checking status 4. // 11:59:56.218 Checking status 5. // 11:59:56.470 Checking status 6. // 11:59:56.722 Checking status 7. // 11:59:56.972 Checking status 8. // 11:59:57.223 Checking status 9. // 11:59:57.473 Checking status 10. // // Changing period to .5 seconds. // // 11:59:57.474 Checking status 1. // 11:59:57.976 Checking status 2. // 11:59:58.476 Checking status 3. // 11:59:58.977 Checking status 4. // 11:59:59.477 Checking status 5. // 11:59:59.977 Checking status 6. // 12:00:00.478 Checking status 7. // 12:00:00.980 Checking status 8. // 12:00:01.481 Checking status 9. // 12:00:01.981 Checking status 10. // // Destroying timer. .NET 包括四个类名为
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