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The IsDate function returns a Boolean value that indicates if the
evaluated expression can be converted to a date. It returns True
if the expression is a date or can be converted to a date; otherwise,
it returns False. The IsDate VBScript function offers an easy
way to validate a date in your server-side ASP code. As you might
have expected the IsDate VBScript function takes only one parameter
- date or string that represents any valid date/time format. The IsDate
function will accept a date argument. If it's a valid date then the
function will return True, if not it will return False.
Note:- The IsDate function uses local setting to determine if
a string can be converted to a date ("January" is not a
month in all languages.)
The Syntax of IsDate function is :-
Example#1 :-
Code :-
document.write(IsDate("April 22, 1947") & "<br
/>")
document.write(IsDate(#11/11/01#) & "<br />")
document.write(IsDate("#11/11/01#") & "<br
/>")
document.write(IsDate("Hello World!"))
Output :-
True
True
False
False |
Example#2 :-
Code :-
<%
Dim theDate
theDate="04/21/2004" 'the date is American format
response.write IsDate(theDate)
%>
Output :-
Below is our code in action:
True |
Example#3 :-
Code :-
<%
Dim theDate
theDate="25/2004"
response.write IsDate(theDate)
%>
Output :-
Below is our code in action:
False |
Example#4 :-
|
Code :-
<%
Response.Write IsDate("January 13, 2003") '
Response.Write IsDate(#1/13/03#) '
Response.Write IsDate("This is not a date") '
Response.Write IsDate("10:55") '
%>
Output :-
True
True
False
True
|
|
