Question

I am trying to have one timer which will do things every 5 seconds or by user specified time interval.

Now, I want to have a function which will count down in 10 milliseconds interval until tick of first timer. I have played around and found a simple way of doing this by doing count of 1/10 of first timers tick interval but when counting the number doesn’t represent anything.

How to do such count down?

This is how I have at this time, but I want to change it:

    private void tmrClickInterval_Tick(object sender, EventArgs e)
    {
        if (nudPlusMinus.Value == 0) tmrClickInterval.Interval = int.Parse(nudClickInterval.Value.ToString());
        else tmrClickInterval.Interval = random.Next(int.Parse(nudClickInterval.Value.ToString()) - int.Parse(nudPlusMinus.Value.ToString()), int.Parse(nudClickInterval.Value.ToString()) + int.Parse(nudPlusMinus.Value.ToString()));

        if (tmrClickInterval.Interval / 10 == 0) tmrNextClick.Interval = 1;
        else tmrNextClick.Interval = tmrClickInterval.Interval / 10;
        tmrNextClick.Start();
        content++;
        nextClick = tmrClickInterval.Interval;
        label1.Text = content.ToString();
    }

    private void tmrNextClick_Tick(object sender, EventArgs e)
    {
        if (nextClick <= 0) tmrNextClick.Stop();
        else
        {
            nextClick = nextClick - (tmrClickInterval.Interval / 10);
            lblNextClickCount.Text = (nextClick / 100).ToString();
        }
    }

Answer 1

First of all I am not sure of exactly what you are trying to do, also at 10 msec intervals you are pushing the minimum resolution of a timer. See this SO question. That being said you can try using the Diagnostics.Stopwatch Class to time the interval between your Tick events. Something like this:

private void tmrClickInterval_Tick(object sender, EventArgs e)
    {
        stopWatch.Stop();
        stopWatch.Reset();         
        stopWatch.Start();
        tmrNextClick.Start();
        content++;
        label1.Text = content.ToString();
    }

    private void tmrNextClick_Tick(object sender, EventArgs e)
    {
        nextClick = (((tmrClickInterval.Interval) - stopWatch.ElapsedMilliseconds) / 10) * 10;
        if (!(nextClick < 0))
        {
            lblNextClickCount.Text = nextClick.ToString();
        }
    }