StringToDays (String function)

Convert string date/time to days since 1900 (String class)

[Introduced in Sirius Mods 7.8]

StringToDays is an intrinsic function to convert a date/time string to days since 1900.

Syntax

%days = string:StringToDays( format, [[CentSpan=] number]) Throws InvalidDateString

Syntax terms

%days	The float variable to receive the computed time since 1900.
string	The input date/time string, which must be in the format specified by format.
format	The format of the date/time string. See "Datetime formats".
CentSpan	The CENTSPAN value used, if the format has a two-digit year. The default is specified by the CENTSPAN parameter. In Sirius Mods 7.9 and later this is a name allowed parameter. For versions prior to 7.9, it is a positional parameter.

Usage notes

• If the format is invalid, the request is cancelled.
• If the date contents of the method object string is invalid, an InvalidDateString exception is thrown.
• If the CentSpan value is invalid, the request is canceled.
• Values returned by StringToDays can be stored in a BINARY or FLOAT4 field, if you want.
• Dates prior to 1 January 1900 return a negative number.
• The inverse of this function is DaysToString.

Examples

1. This statement converts a value from YYYYMMDD format:

   printText {~='20110520':stringToDays('YYYYMMDD')}

   The result is:

   '20110520':stringToDays('YYYYMMDD')=40681

2. This statement uses StringToDays and DaysToString to convert a value in YYYYMMDD format to the Month DAY, YYYY format:

   printText {~='20110520':stringToDays('YYYYMMDD'):daysToString('Month DAY, YYYY')}

   The result is:

   '20110520':stringToDays('YYYYMMDD'):daysToString('Month DAY, YYYY')=May 20, 2011

See also

• Related intrinsic methods (provide conversion from one form of date representation to another):
  • DaysToString
  • MillisecondsToString
  • SecondsToString
  • StringToMilliseconds
  • StringToSeconds
  • TimeStringConvert
• Related System methods:
  • CurrentTimeMilliseconds
  • CurrentTimeSeconds
  • CurrentTimeDays
  • CurrentTimeString

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