Question

I am working on a small program and, everything works fine. Instead of having a hard coded timer though, I’d like to change the timers interval from the form from a listbox or a numericupdownbox, combobox or something along those lines.

So instead of it being a hard coded 3000MS like it is I wanted to be able to change it on the form from a small menu with 1000-10000 milliseconds.

The thing is, I am not sure how to tell the timer to use an interval specified in a optional box.

Is it possible?

Thanks.

Answer 1

If you’re going to use a control that allows for a non-numeric input such as a TextBox ensure you validate that the input is in fact a number. Better to trap errors in the first place than deal with exceptions later.

private void SetIntervalButton_Click(object sender, EventArgs e)
{
    int interval = 0;
    bool success = Int32.TryParse(intervalTextBox.Text, out interval);

    if(success)
    {
        operationTimer.Interval = interval;
    }
}

You can omit the checking above if you’re using a NumericUpDown control as it only allows a numeric value.

private void SetIntervalButton_Click(object sender, EventArgs e)
{
    operationTimer.Interval = (int) numericUpDown1.Value;
}