ASP/VBScript DateDiff()

Author: admin | Posted: 19-04-2010 | Category: ASP/VBScript & Date Time

ASP/VBScript DateDiff() Returns the number of intervals between two dates.

ShotDev Focus:
- Using Asp and DateDiff() function.

Syntax


DateDiff(interval,  date1, date2 [,firstdayofweek[,  firstweekofyear]])

The DateDiff function syntax has these parts:

Part	Description
interval	Required. String expression that is the interval you want to use to calculate the differences between date1 and date2. See Settings section for values.
date1, date2	Required. Date expressions. Two dates you want to use in the calculation.
firstdayofweek	Optional. Constant that specifies the day of the week. If not specified, Sunday is assumed. See Settings section for values.
firstweekofyear	Optional. Constant that specifies the first week of the year. If not specified, the first week is assumed to be the week in which January 1 occurs. See Settings section for values.

Settings

The interval argument can have the following values:

Setting	Description
yyyy	Year
q	Quarter
m	Month
y	Day of year
d	Day
w	Weekday
ww	Week of year
h	Hour
n	Minute
s	Second

The firstdayofweek argument can have the following values:

Constant	Value	Description
vbUseSystem	0	Use National Language Support (NLS) API setting.
vbSunday	1	Sunday (default)
vbMonday	2	Monday
vbTuesday	3	Tuesday
vbWednesday	4	Wednesday
vbThursday	5	Thursday
vbFriday	6	Friday
vbSaturday	7	Saturday

The firstweekofyear argument can have the following values:

Constant	Value	Description
vbUseSystem	0	Use National Language Support (NLS) API setting.
vbFirstJan1	1	Start with the week in which January 1 occurs (default).
vbFirstFourDays	2	Start with the week that has at least four days in the new year.
vbFirstFullWeek	3	Start with the first full weekof the new year.

Example

asp_datediff.asp


<% Option Explicit %>
<html>
<head>
<title>ShotDev.Com Tutorial</title>
</head>
<body>
<%
Response.write Date&"<br>"
Response.write DateDiff("d","09/01/2010","09/04/2010")&"<br>"
Response.write DateDiff("m","09/01/2010","11/04/2010")&"<br>"
Response.write DateDiff("n","08:30","12:00")&"<br>"
Response.write DateDiff("h","08:30","15:30")&"<br>"
%>
</body>
</html>

Create a asp file and save to path root-path/myasp/

Run
http://localhost/myasp/asp_dateadd.asp

Screenshot