CFFORM and CFC usage

Question

I have form that is calling itself for submission, and at the
top of the
form, I have:
<cfif structkeyexists(url,"m")>
<cfswitch expression="#m#">
<cfcase value="0">
<cfinvoke component="compoents.post" method="infoMail">
<cfinvokeargument name="fName" value="#form.fName#">
<cfinvokeargument name="lName" value="#form.lName#">
<cfinvokeargument name="Address1"
value="#form.Address1#">
<cfinvokeargument name="Address2"
value="#form.Address2#">
<cfinvokeargument name="City" value="#form.City#">
<cfinvokeargument name="State" value="#form.State#">
<cfinvokeargument name="Zip" value="#form.Zip#">
<cfinvokeargument name="Plus4" value="#form.Plus4#">
<cfinvokeargument name="Email" value="#form.Email#">
<cfinvokeargument name="Info" value="#form.Info#">
<cfinvokeargument name="Events" value="#form.Events#">
<cfinvokeargument name="Class" value="#form.Class#">
<cfinvokeargument name="News" value="#form.News#">
</cfinvoke>
</cfcase>
<cfcase value="1">
</cfcase>
</cfswitch>
</cfif>
The problem is that if a checkbox on the form isn't selected,
then I get:
Element EVENTS is undefined in FORM
How can I get around this?? On the CFC I have it setting a
default
value of 0, and it isn't required.....

Answer 1

Steve G wrote:
>
> The problem is that if a checkbox on the form isn't
selected, then I get:
>
> Element EVENTS is undefined in FORM
>
> How can I get around this?? On the CFC I have it setting
a default
> value of 0, and it isn't required.....
That is a standard problem with the HTTP standard and the
check box and
radio button controls. If they are not selected no key is
sent to the
server. Your default in the CFC is not working because the
code is
failing when trying to use the non-existent 'form.events'
value in the
<cfinvokeargument...> tag. You just have to code your
form handler page
to understand this might be so. The two most common solutions
to this
is to check for the existence of the field OR to default it
to some value.
The struckKeyExists() function works well to test for the
existence of
form fields as the form and url variables are structures.
I.E.
<cfif structKeyExists(form,"Events")>
<cfinvokeargument name="Events" value="#form.Events#">
</cfif>
The <cfparam...> tag is designed to provide a default
value to something
if it does not exists.
I.E.
<!--- at the top of the form action page --->
<cfparam name="form.events" default="0">