can ASP check if an object is an integer?

Lord Merlin · Jul 21, 2004

Sorry for the dumb question, but what is the function in ASP to see if an
object / string is an integer?

I want to check the contents of a form, and if it's an integer, i.e a
number, do something, else if it's a word do something else, and I'm not
sure howto?

--

Kind Regards
Rudi Ahlers
+27 (82) 926 1689

Greater love has no one than this, that he lay down his life for his friends
(John 15:13).

Steven Burn · Jul 21, 2004

If IsNumeric(String_To_Check) Then
'// True
'// Do something
Else
'// False
'// Do something else
End If

--

Regards

Steven Burn
Ur I.T. Mate Group
www.it-mate.co.uk

Keeping it FREE!

Lord Merlin · Jul 21, 2004

Aha, thanx very much

Lord Merlin · Jul 21, 2004

Bob Lehmann · Jul 21, 2004

If Not IsNumeric(industry) Then

'---- Do Stuff

End If

Bob Lehmann

Bob Lehmann · Jul 21, 2004

Actually, these are VbScript commands.

VbScript documentation..
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/vtoriVBScript.asp

JScript documentation...
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/js56jsoriJScript.asp

Bob Lehmann

Lord Merlin · Jul 22, 2004

Thanx

--

Kind Regards
Rudi Ahlers
+27 (82) 926 1689

Greater love has no one than this, that he lay down his life for his friends
(John 15:13).
| If Not IsNumeric(industry) Then
|
| '---- Do Stuff
|
| End If
|
| Bob Lehmann
|
| | > Ok, one more question, how do I use this, if I want to checkif it's not
an
| > integer.
| >
| > I want to check two things, like so:
| >
| > if company_count = 0 and Is(not?)Numeric(industry) then
| > // stuff here
| > end if
| >
| > i.e. If company_count = 0, and industry is not an integer?
| > --
| >
| >
| > Kind Regards
| > Rudi Ahlers
| > +27 (82) 926 1689
| >
| > Greater love has no one than this, that he lay down his life for his
| friends
| > (John 15:13).
| > | > | If IsNumeric(String_To_Check) Then
| > | '// True
| > | '// Do something
| > | Else
| > | '// False
| > | '// Do something else
| > | End If
| > |
| > | --
| > |
| > | Regards
| > |
| > | Steven Burn
| > | Ur I.T. Mate Group
| > | www.it-mate.co.uk
| > |
| > | Keeping it FREE!
| > |
| > |
| > | | > | > Sorry for the dumb question, but what is the function in ASP to see
if
| > an
| > | > object / string is an integer?
| > | >
| > | > I want to check the contents of a form, and if it's an integer, i.e
a
| > | > number, do something, else if it's a word do something else, and I'm
| not
| > | > sure howto?
| > | >
| > | > --
| > | >
| > | >
| > | > Kind Regards
| > | > Rudi Ahlers
| > | > +27 (82) 926 1689
| > | >
| > | > Greater love has no one than this, that he lay down his life for his
| > | friends
| > | > (John 15:13).
| > | >
| > | >
| > |
| > |
| >
| >
|
|

Jeff Cochran · Jul 22, 2004

Aha, thanx very much

btw, is there a manual / website with all the classis ASP commands /
functions / etc?

I personally like DevGuru:

http://www.devguru.com/Technologies/vbscript/quickref/vbscript_intro.html

Jeff

Bob Barrows [MVP] · Jul 22, 2004

Lord said:
Sorry for the dumb question, but what is the function in ASP to see
if an object / string is an integer?

I want to check the contents of a form, and if it's an integer, i.e a
number, do something, else if it's a word do something else, and I'm
not sure howto?

Everone has been recommending IsNumeric(), but that function is flawed. What
do you guess will be returned by:

Response.Write IsNumeric("1e2")

Try it, I'll wait.

Surprised? Try "1d2".

The explanation is that e and d are exponent indicators. Try CDbl("1d2") and
see what you get ....

100, right? "d" and "e" aren't the only characters that can cross you up.
Depending on the locale, some characters can be used for currency symbols
and thus will also be passed by IsNumeric(), which only verifies that a
string can be converted to at least one of the many numeric subtypes
(including currency, double, single and integer).

The real solution is to use a regular expression to verify that the string
contains only the characters 0-9 (you could use on error resume next and
CInt(), checking for an error on the following line, but it's silly to raise
an error for this purpose).

I just got called away, so somebody else is going to have to show you the
reg exp to use for this task. Chris Hohmann, are you out there?

Bob Barrows

Chris Hohmann · Jul 22, 2004

Bob Barrows said:
The real solution is to use a regular expression to verify that the string
contains only the characters 0-9 (you could use on error resume next and
CInt(), checking for an error on the following line, but it's silly to raise
an error for this purpose).

I just got called away, so somebody else is going to have to show you the
reg exp to use for this task. Chris Hohmann, are you out there?

Positive Integer Without Separator:
^\d{1,5}$

Positive Integer With Separator:
^(\d{1,2},\d{3}|\d{1,3}$

Positive/Negative Without Separator:
^-?\d{1,5}$

Positive/Negative With Separator
^-?(\d{1,2},\d{3}|\d{1,3})$

You may need to adjust the above if your locale uses something other than
comma as the thousands separator. Also, you'll want to check for integer
overflow errors.

Can if statements be used in global.asa?	3	Jun 20, 2004
sample ASP XP Mail component	7	Apr 13, 2004
comparing two tables?	2	Jul 11, 2004
Can multi queries be done in ASP pages?	3	May 10, 2004
Buffering cannot be turned off once it is already turned on.	0	Apr 11, 2004
which scripting languages can be used?	4	Apr 11, 2004
regexing through numbers?	5	Jun 7, 2004
delete multiple DB entries?	6	Apr 3, 2004

can ASP check if an object is an integer?

Lord Merlin

Steven Burn

Lord Merlin

Lord Merlin

Bob Lehmann

Bob Lehmann

Lord Merlin

Jeff Cochran

Bob Barrows [MVP]

Chris Hohmann

Ask a Question

Similar Threads

Members online

Forum statistics

Latest Threads