Hi,

How do you check for a empty value from a form?

lservice = request.form("pservice")

if not isnull(lservice) then <== this doesnt work.
tried "" empty string and it still didnt work.
......

I'm having problems with the fact the user didnt enter anything. The field
is optional.

thanks,
Will

[quoted text, click to view]

form and querystring variables contain strings, so just check the number of
characters:

if len(lservice) > 0 then


Bob Barrows
--
Microsoft MVP - ASP/ASP.NET
Please reply to the newsgroup. This email account is my spam trap so I
don't check it very often. If you must reply off-line, then remove the
"NO SPAM"

[quoted text, click to view]
:
: lservice = request.form("pservice")
:
: if not isnull(lservice) then <== this doesnt work.
: tried "" empty string and it still didnt work.
: .....
:
: I'm having problems with the fact the user didnt enter anything. The
field
: is optional.

This works also:

if lserver <> "" then
' value present
else
' no value present
end if

--
Roland Hall
/* This information is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of merchantability
or fitness for a particular purpose. */
Technet Script Center - http://www.microsoft.com/technet/scriptcenter/
WSH 5.6 Documentation - http://msdn.microsoft.com/downloads/list/webdev.asp
MSDN Library - http://msdn.microsoft.com/library/default.asp

And here are some server-side validation links:

Server-Side Form Validation by Dianna Leech - 12/1/1999
http://www.4guysfromrolla.com/webtech/120199-1.shtml

An Email Validation Routine by João Vieira - 4/11/1999
http://www.4guysfromrolla.com/webtech/041199-1.shtml
Somewhat shorter.

An Email Validation Script by Ben Durbin - 5/19/1999
http://www.4guysfromrolla.com/webtech/051999-1.shtml
Longer.

Form Handler: Some light form validation and error notification.
http://www.asp101.com/samples/form_handler.asp
Uses function to loop thru all fields in a form.

And some client-side ones:

Javascript Field Validations -- Client Side Scripting by Nannette
Thacker - 8/19/1999
http://www.shiningstar.net/articles/articles/javascript/javascriptvalida
tions.asp?ID=AW

Form Validation Using Javascript - 9/19/1998
http://www.4guysfromrolla.com/webtech/091998-1.shtml
Good tips such as saving JavaScript functions in a file called
DataValidation.js and including this in pages that need this.
JavaScript functions.

WebDaily: Your daily source for Web Technology Tips and Tricks! -
10/27/1998
http://www.4guysfromrolla.com/webtech/102798-1.shtml
Just checks if fields filled in.

Best regards,
J. Paul Schmidt, Freelance ASP Web Developer
http://www.Bullschmidt.com
ASP Design Tips, ASP Web Database Demo, Free ASP Bar Chart Tool...