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How do I prevent the timer from starting the first time at startup?

I have a timer that does a specific action when it starts (1000ms interval). Is there a way to prevent the timer from starting and go to the function the first time and start doing code instead?

private void timer_Tick(object sender, EventArgs e)
{
    labelStatus.Text = "Waiting for next file" + "(" + (class.property / 1000).ToString("#0.##0") + " seconds)";
    class.property -= 1000;
}

I want the timer to immediately start counting down (update the label) instead of waiting 1 second before updating the first label

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3 answers


What is stopping you from extracting the code fired on the Timer_Elapsed event and creating a separate procedure (aka Refactoring).
After your procedure will call it just before the timer starts.

For example, from this:

private void Timer_Elapsed(object sender, TimerElapsedEventArgs e)
{
    int a = 0;
    for(i=0; i<100;i++)
       a += i;
}

to ....



private void Timer_Elapsed(object sender, TimerElapsedEventArgs e)
{
    ExecuteCalc();
}
private void ExecuteCalc()
{
    int a = 0;
    for(i=0; i<100;i++)
       a += i;
}

and in your code:

ExecuteCalc();
Timer1.Enabled = true;
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Instead of doing it the way you do, you can simply execute the code that your timer should use when it is ticking right before turning it on.

Example:



public Main()
{
    DoWork();
    Timer1.Enabled = true;
}


protected void Timer1_Tick(object sender, args e)
{
    DoWork();
}
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You can simply "fake" a call to your ticker handler like this:

timer_Tick(null, null);

when you first start your timer. However, this is bad form and it is better to extract the code (refactoring) into a method and call the method. Then ask your handler for the same method as Steve:

private void timer_Tick(object sender, EventArgs e)
{
     UpdateLabel();
}

private UpdateLabel() 
{
    labelStatus.Text = "Waiting for next file" + "(" + (class.property / 1000).ToString("#0.##0") + " seconds)";
    class.property -= 1000;
}

Now call it the same way Jeff showed you:

UpdateLabel();
timer.Enable = true;
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