Obtain eventhandler method from timer

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C#

private void StopTimer(System.Timers.Timer myTimer, ElapsedEventHandler onIntervalElapsed)
        {
            //Derive onIntervalElapsed from myTimer and store in variable.
            //var propertyFromNonPublicMembers = e.g. myTimer.GetProperty("onIntervalElapsed");
            

            if (myTimer != null)
            {
                if (myTimer.Enabled == true)
                    myTimer.Enabled = false;

                try
                {
                    myTimer.Elapsed -= onIntervalElapsed;
                    //myTimer.Elapsed -= propertyFromNonPublicMembers;
                }
                catch (Exception)
                {
  
                }
                finally
                {
                    myTimer.Dispose();
                    myTimer = null;
                    Debug.WriteLine(DateTime.Now.ToString("HH:mm:ss.fff") + $" Timer {myTimer} stopped");
                }
            }
        }

What I have tried:

Currently passing System.Timers.Timer and ElapsedEventHandlerTried to method StopTimer

Wondering if it is possible to obtain "onIntervalElapsed" value from myTimer in order to unsubscribe from the Timer.Elapsed event and therefore the need of passing the ElapsedEventHandler onIntervalElapsed to the method in the first place.

Posted 30-Apr-20 23:22pm

Member 12014273

Updated 1-May-20 11:50am

v2

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Richard MacCutchan 1-May-20 10:11am

Does the documentation show that as one of the properties of a timer?

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BillWoodruff · Answer 1 · 2020-05-01T11:51:00

System.Timers.Timer is "... for use as a server-based or service component in a multithreaded environment; it has no user interface and is not visible at runtime." MSDN ... Why did you choose this Timer from the 4 types of Timers available ?

Why do you need to get the 'ElapsedEventHandler at run-time ? Why not just define it, and use the reference to it, like this:

System.Timers.Timer myTimer = new System.Timers.Timer();

private void MyTimerOnElapsed(object sender, ElapsedEventArgs e)
{
    // whatever
}

private void StopTimer()
{
    myTimer.Stop();
    myTimer.Elapsed -= MyTimerOnElapsed;
    myTimer.Dispose();
    myTimer = null;
    Debug.WriteLine(DateTime.Now.ToString("HH:mm:ss.fff") + $" Timer {myTimer} stopped");
}