How do Timers work in .net?

Question

I activated my windows timer and tried to stop but it seems not to be working, please see my code:

private void button1_Click(object sender, EventArgs e)
{
        timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
        MessageBox.Show("Hello");
        timer1.Stop();
}

It shows the message over and over again and it doesn't stop. Please give me some ideas, I am very grateful for your help.

Maybe this link will help you to solve your problem. http://stackoverflow.com/questions/4563704/c-sharp-how-do-you-stop-a-timer — Joseph, Jan 16 '17 at 08:36
this will help you to understand http://stackoverflow.com/a/4563738/5001784 — Pranav Patel, Jan 16 '17 at 08:41

Thorsten Dittmar · Accepted Answer · 2017-01-16T09:32:20.003

2

You need to stop the timer before showing the message box. Otherwise they may pile up.

There is the System.Timers.Timer that can be configured to be a one-shot timer, but the general approach for other timers is:

When the timer event fires, stop the timer, do your thing and then start the timer again if needed.

edited Jan 16 '17 at 09:32

answered Jan 16 '17 at 08:36

Thorsten Dittmar

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Thanks for your answer. Is there any way to re-execute the timer n times? "For" loop with n times doesn't work. – Hoang Viet Jan 16 '17 at 09:08
Sure. You need a class variable like `int timerRanHowManyTimes = 0` and in every timer event, the variable is increased. Only restart the timer in its event when the value of that variable is less than the desired number of times. – Thorsten Dittmar Jan 16 '17 at 09:31

score 0 · Answer 2 · answered Jan 16 '17 at 08:42

0

At line MessageBox.Show("Hello"); The execution will stop there waiting for the user to press "OK" button, so line timer1.Stop(); won't be reached until user interacts with the message box, and the timer will continue to work this way.

answered Jan 16 '17 at 08:42

Ali Ezzat Odeh

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How do Timers work in .net?

2 Answers2