Question

I want to raise an event every time each hour has passed in system clock.
For example, I run my program at 7:45 am then the event should be raised at 8:00 am, not at 8:45 am.
After the event raised at 8:00 am, then this event should be raised at every hour 9:00 am, 10:00 am, 11:00 am, etc…

Can anyone help me to show some code…
I use C#.net…
Thanks in advance…

UPDATE:

Now I get the simple solution for my question. Therefore I would like to share this solution. lboshuizen’s answer is already correct. My answer is same logic with lboshuizen’s answer but more detail and exact.

Firstly it needs to use Timer. Timer basically works based on milliseconds which sometimes needs additional calculation. Therefore, I would like to implement milliseconds to minute formatting function as first.

int CalculateMillisecondUntilNextHour()
{
     int REMAIN_MINUTE = 60 - DateTime.Now.Minute;
     DateTime now = DateTime.Now;
     DateTime nexthour = now.AddMinutes((minute)).AddSeconds(now.Second * -1).AddMilliseconds(now.Millisecond * -1);

     TimeSpan interval = nexthour - now;
     return (int)interval.TotalMilliseconds;
}

void CheckEachHourPassed()
{
     System.Windows.Forms.Timer t = new System.Windows.Forms.Timer();
     t.Interval = CalculateMillisecondUntilNextHour();
     t.Tick += new EventHandler(t_Tick);
     t.Enabled = true;
}

void t_Tick(object sender, EventArgs e)
{
     MessageBox.Show("Raise Your Event");
     t.Interval = CalculateTimerInterval(REMAIN_MINUTE);
}

At here, the main working function is CheckEachHourPassed(). Call this function where you want to start your event scheduler.

Answer 1

Pseudo code (implementation is left as an excercise to the reader)

var currentTime = Time.Now()
var deltaMinutes  = Calculate_minutes_till_next_full_hour(currentTime);
wait(deltaMinutes);
var timer = new timer();
timer.Every().Minutes(60).Execute(() => Code());