Executing method every hour on the hour

Question

I want to execute a method every hour on the hour. I wrote some code,but it is not enough for my aim. Below code is working every 60 minutes.

public void Start()
{
    System.Threading.Timer timerTemaUserBilgileri = new System.Threading.Timer(new System.Threading.TimerCallback(RunTakip), null, tmrTemaUserBilgileri, 0);
}

public void RunTakip(object temauserID)
{
    try 
    {
        string objID = "6143566557387";
        EssentialMethod(objID);
        TimeSpan span = DateTime.Now.Subtract(lastRunTime);
        if (span.Minutes > 60)
        {
            tmrTemaUserBilgileri = 1 * 1000;
            timerTemaUserBilgileri.Change(tmrTemaUserBilgileri, 0);
        }
        else
        {
            tmrTemaUserBilgileri = (60 - span.Minutes) * 60 * 1000;
            timerTemaUserBilgileri.Change(tmrTemaUserBilgileri, 0);
        }
        watch.Stop();
        var elapsedMs = watch.ElapsedMilliseconds;
    }
    catch (Exception ex)
    {
        timerTemaUserBilgileri.Change(30 * 60 * 1000, 0);
        Utils.LogYaz(ex.Message.ToString());
    }
}

public void EssentialMethod(objec obj)
{
    //some code
    lastRunTime = DateTime.Now;
    //send lastruntime to sql 
}

Answer 1

How about something simpler? Use a one-minute timer to check the hour:

public partial class Form1 : Form
{
    int hour;
    public Form1()
    {
        InitializeComponent();

        if(RunOnStartUp)
            hour = -1;
        else
            hour = DateTime.Now.Hour;

    }
    private void timer1_Tick(object sender, EventArgs e)
    {
        // once per minute:
        if(DateTime.Now.Hour != hour)
        {
            hour = DateTime.Now.Hour;
            DailyTask();
        }
    }
    private DailyTask()
    {
        // do something
    }
}