I was tasked with having to create an unknown amount of textboxes dynamically with ColdFusion.

I was running into a lot of problems because something like this:

1. <cfloop index="i" from="1" to="#numberoftextboxes#">
2.         <cfset myvar = FORM."txtbox_"&#i# />
3.         <cfoutput>
4.                 #myvar#
5.         </cfoutput>
6. </cfloop>

 

DOESN’T Work!

 

For this to work you need to use the EVALUATE function in ColdFusion. Create something like this:

1. <cfloop index="i" from="1" to="#numberoftextboxes#">
2.         <cfset myvar = Evaluate( "FORM.txtbox_#i#" ) />
3.         <cfoutput>
4.                 #myvar#
5.         </cfoutput>
6. </cfloop>

 

If I have create 15 text boxes dynamically created, then submit the form, I can loop over all of them like I did above and it will give me the value of what was entered into each of the 15 text boxes.

 

Ben Nadel gives a little more detail with a few more examples about creating dynamic variables here:
http://www.bennadel.com/blog/152-Dynamic-ColdFusion-Variables-Via-Quoted-Naming.htm