Question

I’m attempting to make a “simple” timer from 15 minutes to 0 seconds. I’m using 900 seconds as my 15 minutes. When I Run the program it runs through fine but Continues going into the negatives. I’m still a novice at C#. I’m wanting the code to stop at 0 and run an alert to grab someone’s attention. Here is what I have thus far

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Timers;

namespace GBS_GI_Timer
{
   public class Program
    {
       public static int t = 2;

        public static void Main()
        {
            System.Timers.Timer aTimer = new System.Timers.Timer();

            // Hook up the Elapsed event for the timer.
            aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);

            aTimer.Interval = 1000;
            aTimer.Enabled = true;

            //Console.WriteLine("Press the Enter key to exit the program.");
            Console.ReadLine();


            //GC.KeepAlive(aTimer);
            if (t == 0)
            aTimer.Stop();
        }
        public static void OnTimedEvent(object source, ElapsedEventArgs e)
        {
            //TimeSpan timeRemaining = TimeSpan.FromSeconds(t);

            Console.WriteLine("Time remianing..{0}", t);
            t--;

            if (t == 0)
            {
                Console.WriteLine("\a");
                Console.WriteLine("Time to check their vitals, again!");
                Console.WriteLine("Press any key to exit...");
            }
            // Console.ReadKey();
            Console.ReadLine();
        }
    }
}

Answer 1

You would have to refactor your code as below to make it work, System.Timers.Timer used ThreadPool to run the callback routines.

class Program
{
    public static int t = 2;
    static System.Timers.Timer aTimer = new System.Timers.Timer();

    public static void Main()
    {

        // Hook up the Elapsed event for the timer.
        aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);

        aTimer.Interval = 1000;
        aTimer.Enabled = true;

        Console.ReadLine();
    }
    public static void OnTimedEvent(object source, ElapsedEventArgs e)
    {
        Console.WriteLine("Time remianing..{0}", t);
        t--;

        if (t == 0)
        {
            Console.WriteLine("\a");
            Console.WriteLine("Time to check their vitals, again!");
            Console.WriteLine("Press any key to exit...");
            aTimer.Stop();
            Console.ReadLine();
        }
    }
}