How to resume a timer in another form?

Question

2.33/5 (2 votes)

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I have Form1 and Form2.

I have a Timer in Form1, named timer.

Now, when the user clicks on the Pause button in Form1, Form2 pops up, and the timer pauses.

When the user clicks on button1 on Form2, Form2 will close and the timer is supposed to continue running, but right now I can't make it happen.

Here's what I've tried so far:

On Form1:

C#

private void btnPause_Click(object sender, EventArgs e)
{
    timer.Stop();
    new Form2(this).ShowDialog();

}

//and a method Form2 can call to start the timer again
public void startTimer()
{
    timer.Start();
}

And on Form2:

C#

Form f1;
Form1 form1 = new Form1();

public Form2(Form1 f)
{
    this.f1 = f;

}
private void button1_Click(object sender, EventArgs e)

{
    form1.startTimer();
    this.Close();

}

I'm referencing since there's also another button on Form2 that when clicked will close Form2 and Form1 and will show another form.
I'm not sure if I should actually instantiate Form1, but I can't seem to access startTimer() through f1.

What would be the best approach to solve this?

Posted 30-Aug-14 16:22pm

kmllev

Updated 30-Aug-14 16:26pm

v2

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[no name] 30-Aug-14 22:30pm

That's because you would need to use f1 not form1

kmllev 30-Aug-14 22:33pm

Yes, and I've tried it, but for some reason, when I type f1.startTimer(); I get an error saying 'System.Windows.Forms.Form' does not contain a definition for 'startTimer' and no extension method 'startTimer' ......

[no name] 30-Aug-14 22:36pm

Well it is most likely not lying to you. You need to review your architecture.

kmllev 30-Aug-14 22:50pm

That's the problem, I'm just beginning to learn C# and I can't seem to find what's wrong.

1 solution

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Ravi Bhavnani · Accepted Answer · 2014-08-30T18:26:00

Solution 1

Don't pass an instance of Form1 to Form2.

Rewrite btnPause_Click() like so:

private void btnPause_Click(object sender, EventArgs e)
{
    timer.Stop();              // stop the timer
    new Form2().ShowDialog();  // show Form2 and wait until the user closes it
    timer.Start();             // restart the timer
}

/ravi

Posted 30-Aug-14 18:26pm

Ravi Bhavnani

Comments

kmllev 31-Aug-14 0:32am

I can't believe it's that simple. Gah I complicate things a lot. Thank you!!!