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

Note
This method does not support all combinations of cron strings. Please test extensively before use. Please post an issue with any syntax that should work, but doesn't.

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