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

User · Accepted Answer

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

User · Answer

Other alternative way to reset the windows timer is using the counter  as follows  int timerCtr   0  Timer mTimer   private void ResetTimer     gt  timerCtr   0  private void mTimer Tick         timerCtr           Perform task      So if you intend to repeat every 1 second  you can set the timer interval at 100ms  and test the counter to 10 cycles  This is suitable if the timer should wait for some processes those may be ended at the different time span

User · Answer

I just assigned a new value to the timer  mytimer Change 10000  0      reset to 10 seconds It works fine for me  at the top of the code define the timer  System Threading Timer myTimer  if   active      myTimer   new Timer new TimerCallback TimerProc     myTimer Change 10000  0   active   true   private void TimerProc object state           The state object is the Timer object      var t    Timer state       t Dispose        Console WriteLine  quot The timer callback executes  quot        active   false              Action to do when timer is back to zero

User · Answer

For a Timer  System Windows Forms Timer    The  Stop  then  Start methods worked as a reset

User · Answer

For clarity since some other comments are incorrect  when using System Timers setting Enabled to true will reset the elapsed time  I just tested the behavior with the below   Timer countDown  new Timer 3000    Main         TextBox TextDidChange    TextBox TextDidChange      countdown Elapsed    CountDown Elapsed     void TextBox TextDidChange Object sender  EventArgs e        countdown Enabled   true     void CountDown Elapsed object sender  EventArgs e        System Console WriteLine  Elapsed        I would input text to the text box repeatedly and the timer would only run 3 seconds after the last keystroke  It s hinted at in the docs as well  as you ll see  calling Timers Start   simply sets Enabled to true   And to be sure  which I should ve just went straight to from the beginning  you ll see in the  NET reference source that if enabling an already Enabled timer it calls the private UpdateTimer   method  which internally calls Change

User · Answer

You could write an extension method called Reset    which    calls Stop  -Start   for Timers Timer and Forms Timer  calls Change for Threading Timer

User · Answer

You can do timer Interval   timer Interval

User · Answer

All the timers 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 it

User · Answer

For System Timers Timer  according to MSDN documentation  http   msdn microsoft com en-us library system timers timer enabled aspx      If the interval is set after the Timer has started  the count is   reset  For example  if you set the interval to 5 seconds and then set   the Enabled property to true  the count starts at the time Enabled is   set  If you reset the interval to 10 seconds when count is 3 seconds    the Elapsed event is raised for the first time 13 seconds after   Enabled was set to true    So       const double TIMEOUT   5000     milliseconds      aTimer   new System Timers Timer TIMEOUT       aTimer Start           timer start running                   aTimer Interval   TIMEOUT      restart the timer

User · Answer

i do this     Restart the timer queueTimer Enabled   true

[c#] How to reset a timer in C#?

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