How to reset a timer in C#?

Question

There are three Timer classes that I am aware of, System.Threading.Timer, System.Timers.Timer, and System.Windows.Forms.Timer, but none of these have a .Reset() function which would reset the current elapsed time to 0.

Is there a BCL class that has this functionality? Is there a non-hack way of doing it? (I thought perhaps changing the time limit on it might reset it) Thought on how hard it would be to reimplement a Timer class that had this functionality, or how to do it reliably with one of the BCL classes?

Answer 1

I always do ...

myTimer.Stop();
myTimer.Start();

... is that a hack? :)

Per comment, on Threading.Timer, it's the Change method ...

dueTime Type: System.Int32 The amount of time to delay before the invoking the callback method specified when the Timer was constructed, in milliseconds. Specify Timeout.Infinite to prevent the timer from restarting. Specify zero (0) to restart the timer immediately.

Answer 2

I believe they all have the equivalent of Start() and Stop() methods, except System.Threading.Timer.

So an extension method such as

public static void Reset(this Timer timer)
{
  timer.Stop();
  timer.Start();
}

Is one way to go about this.

Answer 3

You could write an extension method called Reset(), which

• calls Start()-Stop() for Timers.Timer and Forms.Timer
• calls Change for Threading.Timer

Answer 4

there is no any other timer as you have specified except than window.forms.timer in vs2008

Answer 5

other alternative way to reset the windows.timer is using the counter, as follows:

int tmrCtr=0; Timer mTimer;

private void ResetTimer() { tmrCtr=0; }

private void mTimer_Tick() { tmrCtr++; //perform task }

so if you intend to repeat everi 1 second, you can set the timer interval at 100ms, and test the counter to 10 cycles.

this suitable if the timer should wait for some processes those my be ended at the different time span.

Answer 6

For a Timer (System.Windows.Forms.Timer).

The .Stop, then .Start methods worked as a reset.