Make a checkbox required field in a form

[Jimbosar]

Hi,

It is a simple question so there must be a simple answer.....first time I am doing such a thing so I have to ask...

I created a field with acheckbox in my form (like the ones: I agree with the TERMS & CONDITIONS) so you have to check the box in order to move on with the registration. With other words I want to make the field compulsory.

I would appreciate any thoughts on this...

Thanks

[Roy Sinclair]

If Peter Bailey posted this it'd be a troll :D but look here (http://www.peterbailey.net/fValidate/site.php).

[Jimbosar]

Thanks Roy Sinclair,

but.....unfortunately the checkbox validation is not there....not yet
...:mad: :mad: :mad: .....

if you know any other site would be much appreciated

[whammy]

You simply request the variable of the checkbox on the form you post to (even if you post it to itself), i.e.:


Dim mycheckbox
mycheckbox = Request.Form("mycheckbox")

If mycheckbox = "" Then
' Either redirect to the form that posted
' it with a querystring like ?E=1
' so you know there's an error, or
' display the subroutine that presents
' your form again (if you posted it to itself).
Else
' Do whatever you want to do if the var has a value
End If


That's very basic validation, in any language... if I were you I'd look at some tutorials like the ones on:

http://www.webmonkey.com/authoring <!-- especially these!!

http://www.liquidrage.com
http://www.haneng.com

And you may want to check out my example email form, as it has good basic validation that you can learn from (as well as being a good example of posting a form to itself, which is useful to get a handle on since that's how ASP.NET works!):

http://www.solidscripts.com/email.txt

P.S. make sure your checkbox has a value, like:

<input type="checkbox" name="mycheckbox" value="Y" />

:)

[Jimbosar]

Thanks a lot :)

[whammy]

No problem... I have no beef with Roy Sinclair's post - but it looks to me like that API he referenced is total javascript, whereas if you're using ASP (or any other server-side language), you don't want to rely on javascript as the user MAY have it disabled (or have a browser that isn't standards compliant or perhaps a PDA, etc.).

Since you're using ASP, it will return pure HTML to the client, so there should be no problems with compatibility assuming you are coding correct (X?)HTML.