Thanks Christopher, that is what I wound up doing.

Steve LaBadie, Web Manager
East Stroudsburg University
570-422-3999
http://www.esu.edu
[email protected]


-----Original Message-----
From: Christopher Watson [mailto:[email protected]] 
Sent: Monday, April 30, 2012 2:34 PM
To: cf-talk
Subject: Re: isDefined inside a cfloop


Steve, to respond to your inquiry specifically, I've always felt it was
best to take complete control over what is in the Form scope, right from
the top, by laying out a series of <cfparam> tags and their default
values, especially if check boxes or initially-unselected radio button
groups are part of the form.

<cfparam name="Form.thisField" default="">
<cfparam name="Form.thatField" default="0">

Then my back-end logic, working with the assumption that everything IS
defined, regardless of what the user did or did not do in the form, is
free to simply test a form field value to see if it has changed from its
default to know if it has been selected or a user value provided. No
dinking around with browser implementation junk.

With that Yes/No radio button thing, general UI guidelines specify that
at least one element of a mutually exclusive control group be defaulted
to 'selected' when the interface is presented. After having said that,
though, you should actually consider changing question input like "Do
you have an Undergraduate Degree?" from a Yes/No (boolean) radio button
input to simply a single check box, with a rephrased question like "I
have an Undergraduate Degree". Then, that's where your use of the
<cfparam> tag comes into play, because you can prescribe a fixed value
to that one check box input element, and only when the check box is
checked off does that become the value for it, differentiating it from
the default value, and indicating that it was "selected".

<cfparam name="Form.UnderGrad" default="0">
...
<input type="checkbox" name="UnderGrad" value="1"> <strong>I have an
Undergraduate Degree</strong>
...
<cfif Form.UnderGrad eq 1>
    <!--- If it equals 1 at form submit, instead of the default 0, then
it was selected --->
</cfif>

-Christopher 



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