TriggerFromCronFormat Method

public static Trigger[] FromCronFormat(
	string cronString
)

Parameters

cronString  String

String using cron defined syntax for specifying a time interval. See remarks for syntax.

Return Value

The following combinations are known not to work:

• Intervals on months (e.g. "* * * */5 *")
• Intervals on DOW (e.g. "* * * * MON/3")

This section borrows liberally from the site http://www.nncron.ru/help/EN/working/cron-format.htm. The cron format consists of five fields separated by white spaces:

<Minute> <Hour> <Day_of_the_Month> <Month_of_the_Year> <Day_of_the_Week>

Each item has bounds as defined by the following:

* * * * *
| | | | |
| | | | +---- Day of the Week   (range: 1-7, 1 standing for Monday)
| | | +------ Month of the Year (range: 1-12)
| | +-------- Day of the Month  (range: 1-31)
| +---------- Hour              (range: 0-23)
+------------ Minute            (range: 0-59)

Any of these 5 fields may be an asterisk (*). This would mean the entire range of possible values, i.e. each minute, each hour, etc.

Any of the first 4 fields can be a question mark ("?"). It stands for the current time, i.e. when a field is processed, the current time will be substituted for the question mark: minutes for Minute field, hour for Hour field, day of the month for Day of month field and month for Month field.

Any field may contain a list of values separated by commas, (e.g. 1,3,7) or a range of values (two integers separated by a hyphen, e.g. 1-5).

After an asterisk (*) or a range of values, you can use character / to specify that values are repeated over and over with a certain interval between them. For example, you can write "0-23/2" in Hour field to specify that some action should be performed every two hours (it will have the same effect as "0,2,4,6,8,10,12,14,16,18,20,22"); value "*/4" in Minute field means that the action should be performed every 4 minutes, "1-30/3" means the same as "1,4,7,10,13,16,19,22,25,28".

Reference