How to run .net Core IHosted Service at specific time Of the day?

Question

I am having the following Timer to run in .Net core Ihosted Service,

TimeSpan ScheduledTimespan;
string[] formats = { @"hh\:mm\:ss", "hh\\:mm" };
string strTime = Startup.Configuration["AppSettings:JobStartTime"].ToString();
var success = TimeSpan.TryParseExact(strTime, formats, CultureInfo.InvariantCulture, out ScheduledTimespan);
Timer _timer = new Timer(JobToRun, null, TimeSpan.Zero, ScheduledTimespan);

I'm using this specific overload,

public Timer(TimerCallback callback, object state, TimeSpan dueTime, TimeSpan period);

But JobToRun is executing as soon as the control reached to it. How do I make it run at a specific time of the day on an everyday basis? Thanks in advance.

have you looked at scheduling components like Coravel ? – Aravind Jan 14 '20 at 07:18 — Aravind, Jan 14 '20 at 07:18
No. I haven't. I'll look for it. – Sushant Yelpale Jan 14 '20 at 07:38 — Sushant Yelpale, Jan 14 '20 at 07:38
@Aravind Thanks for your suggestion. I got the slution – Sushant Yelpale Jan 14 '20 at 07:59 — Sushant Yelpale, Jan 14 '20 at 07:59
You can add your answer to the question . – Aravind Jan 14 '20 at 08:37 — Aravind, Jan 14 '20 at 08:37

Sushant Yelpale · Accepted Answer · 2023-03-07T11:42:17.190

Following function returns parsed job run time

private static TimeSpan getScheduledParsedTime()
{
     string[] formats = { @"hh\:mm\:ss", "hh\\:mm" };
     string jobStartTime = "07:10";
     TimeSpan.TryParseExact(jobStartTime, formats, CultureInfo.InvariantCulture, out TimeSpan ScheduledTimespan);
     return ScheduledTimespan;
}

Following function returns the delay time from current time of the day. If current time of the day passed the job run time, appropriate delay will be added to job run like below,

private static TimeSpan getJobRunDelay()
{
    TimeSpan scheduledParsedTime = getScheduledParsedTime();
    TimeSpan curentTimeOftheDay = TimeSpan.Parse(DateTime.Now.TimeOfDay.ToString("hh\\:mm"));
    TimeSpan delayTime = scheduledParsedTime >= curentTimeOftheDay
        ? scheduledParsedTime - curentTimeOftheDay     // Initial Run, when ETA is within 24 hours
        : new TimeSpan(24, 0, 0) - curentTimeOftheDay + scheduledParsedTime;   // For every other subsequent runs
    return delayTime;
}

below timer will call the methodToExecute based on JobRunDelay everyday

_timer = new Timer(methodToExecute, null, getJobRunDelay(), new TimeSpan(24, 0, 0));

Hi, Is it okay for you to update the entire service class. My service is not working as expected, unable to figure out. Will just cross with your service class. — DeSon, Mar 09 '22 at 11:32

How to run .net Core IHosted Service at specific time Of the day?

1 Answers1