add a select all check box in a form.

[Guest_imported]

Hi There:

I have made a form which generates a list of checkboxes ..
I need to add a checkbox checking on which all the check boxes displayed should be checked...

can anyone please suggest me the way to do it...i dont know javascript...coldfusion is fine..

Thanks
GG

 

[GunJack]

Hey gag_bag,

I think this will do what you want without having to use any JS.

<input type=&quot;checkbox&quot; name=&quot;c1&quot; value=&quot;val1&quot;>
<input type=&quot;checkbox&quot; name=&quot;c1&quot; value=&quot;val2&quot;>
<input type=&quot;checkbox&quot; name=&quot;c1&quot; value=&quot;val3&quot;>
...
<input type=&quot;checkbox&quot; name=&quot;c1&quot; value=&quot;val10&quot;>

<input type=&quot;checkbox&quot; name=&quot;c2&quot; value=&quot;val1,val2,val3,...,val10&quot;>

This will send a list of all values selected to the form in either c1 and/or c2. Just use isdefined() to see if c2 is present. If it is, you can disregard c1 like this:

<cfif isdefined(&quot;c2&quot>
<cfset newList=c2>
<cfelse>
<cfset newList=c1>
</cfif>

<cfloop index=&quot;x&quot; list=#newList#>
<cfoutput>#x#<br></cfoutput>
</cfloop>

If having the values in a comma delimited list won't work, there are some other more complicated ways to deal with it though.

Hope this helps,
GJ

 

[Guest_imported]

Hi Gj that was helpful but still my problem is not soled because the form i am fenerating is dynamic and i donnu how many checkboxes are being created...so ur solution cannot be applied can u suggest for this sceanario


thanks a lot

gg.

 

[GunJack]

Hey gg,

There's nothing in the code which expects a finite number of checkboxes so it should still work as long as you generate the form in the manner shown above. You can build the &quot;c2&quot; variable during the loop that generates your checkboxes like this:

<cfset c2=&quot;&quot;>
<cfloop...>
<cfset c2=listappend(c2,#currentCheckBoxValue#)>
<checkbox name=&quot;c1&quot; value=&quot;#currentCheckBoxValue#&quot;>
</cfloop>

GJ

 

[spacemonkey125]

I did it this way with a text link:

Have a link that sets variable checkall to yes:

<a href=&quot;this_page.cfm?checkall=yes&quot;>Check All</a>

Then in your form check for the existence of that variable:

<input type=&quot;checkbox&quot; <cfif IsDefined('checkall')>checked</cfif> name=&quot;deletethis&quot; value=&quot;#id#&quot;>

If you don't want to refresh the page, you can certainly do this with Javascript - and I'm sure there's a copy and paste script available somewhere out there ...