Manipulating Dates
From SmartWiki
| This feature uses JavaScript syntax |  |
The following JavaScript functions are built in to SmartSimple to assist when working with and performing calculations using dates:
ConvertDateStr
Takes a date that is in the users preferred display format and returns the date in the standard database format of yyyy-mm-dd.
Syntax:
- ConvertDateStr(date,'@dateformat@')
Where:
- date is the date you wish to change to the yyyy-mm-dd' format.
Example:
var newDate=ConvertDateStr(frm.startdate.value,'@dateformat@');
ConvertDate
Takes a date that is in the standard database format of yyyy-mm-dd and converts it to the preferred display format of the current user.
Syntax:
- ConvertDate(date,'@dateformat@')
Where:
- date is the date you wish to change to the users preferred display format.
Example:
var newDate=ConvertDate(sdate,'@dateformat@');
ssConvertDate
Takes a date in any date format and converts it to any other date format.
Syntax:
- ssConvertDate(date,'fromdateformat','todateformat')
Where:
- date is the date you wish to change to the users preferred display format.
- fromdateformat is the format of the date you are providing
- todateformat is the format you want the resulting date to use.
Example:
var newDate=ssConvertDate(sdate,'yyyy-mm-dd','dd/mm/yyyy');
or
var newDate=ssConvertDate(sdate,'mm/dd/yyyy','dd-mm-yyyy');
dateadd
Add the specified interval to a date
Syntax:
- dateadd(date,unit,interval)
Where:
- date is the date you wish to add to (or delete from) in format yyyy-mm-dd
- unit specifies what is being added:
- 'd' (days)
- 'm' (months)
- 'yyyy' (years)
- interval is the number of days/months/years to be added.
Example:
var newDate=dateadd(sdate,'m',duration);
Example
The following example adds a specified number of months (saved in cf_123456) to the startdate, and saves it as the enddate.
var sdate=ConvertDateStr(frm.startdate.value,'@dateformat@');
var duration=parseInt(parseFloat(frm.cf_123456.value));
if(isNaN(duration)){
alert("Invalid Duration provided");
return;
}
var edate=dateadd(sdate,'m',duration);
frm.enddate.value=ssConvertDate(edate,"@dateformat@");
Notes
- When using JavaScript to populate a date it must be added to the field in the preferred date format of the current user, as the system will automatically convert it to yyyy-mm-dd when the page is saved.
- To change the display format of dates displayed on the page see sscalculation
