c# - Cron trigger in Quartz.Net for hourly values -

i checking out cron triggers quartz.net , noticed when use other trigger apart hourly, offsets time utc(which should case), when same hourly cron, picks local time.

for example

suppose start time 2014-05-31 15:44:00

for hourly schedule next 6 occasions

cron expression: 0 0 0/1 1/1 * ? *

is given

5/31/2014 5:30:00 pm +00:00 5/31/2014 6:30:00 pm +00:00 5/31/2014 7:30:00 pm +00:00 5/31/2014 8:30:00 pm +00:00 5/31/2014 9:30:00 pm +00:00 5/31/2014 10:30:00 pm +00:00 

this shows time in localtime.

but when try weekly schedule

cron: 0 44 15 ? * sun,mon *

the schedule comes as

6/1/2014 10:14:00 +00:00 6/2/2014 10:14:00 +00:00 6/8/2014 10:14:00 +00:00 6/9/2014 10:14:00 +00:00 6/15/2014 10:14:00 +00:00 6/16/2014 10:14:00 +00:00 

which offset utc, right.

this code using

var cron = new quartz.cronexpression("0 0 0/1 1/1 * ? *"); datetimeoffset? nextfire = cron.getnextvalidtimeafter(convert.todatetime("5/31/2014 4:30:00 pm")); 

obviously, change parameters dynamically.

this piece of code schedule calculation

  var jobitem = (dbcontext.jobs.where(job => job.id == id)).firstordefault();                  list<datetimeoffset> scheduletimes = new list<datetimeoffset>();                  var time = datetimeoffset.now;                  if (!string.isnullorempty(jobitem.cronexpression))                 {                     (int = 0; <= 5; i++)                     {                         var date = getscheduleforcron(jobitem.cronexpression, time);                         scheduletimes.add(date.value);                         time = date.value;                     }                  }                 else                 {                     var jobattribute =                            (from attribute in dbcontext.jobattributes                             attribute.jobid == jobitem.id                             select attribute.specificdate).firstordefault();                      scheduletimes.add(jobattribute.value);                  }       public static datetimeoffset? getscheduleforcron(string cronexpression, datetimeoffset date)     {         var cron = new cronexpression(cronexpression);         return cron.getnextvalidtimeafter(date.datetime);     } 

edit: used http://www.cronmaker.com/ cross verify schedule.

you might confusing usage of local , utc times. if have convert.todatetime("5/31/2014 4:30:00 pm"), datetimeoffset.now or date.datetime . general rule quartz

utc times go in, utc times come out

. here's sample runs case expected output (used non-builder api brevity):

var firsttrigger = new crontriggerimpl(); firsttrigger.cronexpressionstring = "0 0 0/1 1/1 * ? *"; firsttrigger.starttimeutc = new datetime(2014, 05, 31, 15, 44, 00).touniversaltime(); console.writeline("first trigger fire times:"); console.writeline(string.join(environment.newline, triggerutils.computefiretimes(firsttrigger, null, 6).select(x => x.tolocaltime())));  var secondtrigger = new crontriggerimpl(); secondtrigger.cronexpressionstring = "0 44 15 ? * sun,mon *"; secondtrigger.starttimeutc = new datetime(2014, 05, 31, 15, 44, 00).touniversaltime(); console.writeline("second trigger fire times:"); console.writeline(string.join(environment.newline, triggerutils.computefiretimes(secondtrigger, null, 6).select(x => x.tolocaltime()))); 

it output (in gmt+3 locale, cron trigger runs on current locale's time zone default):

first trigger fire times  31.5.2014 16:00:00 +03:00  31.5.2014 17:00:00 +03:00  31.5.2014 18:00:00 +03:00  31.5.2014 19:00:00 +03:00  31.5.2014 20:00:00 +03:00  31.5.2014 21:00:00 +03:00 second trigger fire times:  1.6.2014 15:44:00 +03:00  2.6.2014 15:44:00 +03:00  8.6.2014 15:44:00 +03:00  9.6.2014 15:44:00 +03:00  15.6.2014 15:44:00 +03:00  16.6.2014 15:44:00 +03:00