Can you do a "changing variable" form request in Cold Fusion? 2

[Ayac]

Hi All!

It is probably an easy one for a CF programmer, but I am switching over from ASP and having a hard time with this.
I know this code is bad. It suppose to fill Query String variables into an array where the variable names are Data1, Data2, Data3... Data10 and list them, on screen. What do I need to put into the underlined area or is it even possible in ColdFusion to do it this way?

<CFSET DataT=ArrayNew(1)>
<CFLOOP index="i" from="1" to="10">
<CFSET Datas="Data" & i>
<CFIF IsDefined("Form." & Datas)>
<CFSET DataT=Form.____>
<CFELSE>
<CFSET DataT="">
</CFIF>
<cfoutput>
#DataT#
</cfoutput>
</CFLOOP>

 

[NorthStarDA]

i would do it like this..

<CFSET DataT=ArrayNew(1)>
<CFLOOP index="i" from="1" to="10">
<cfset varname = "FORM.data" & #i#>
<CFPARAM name="#varname#" default="">
<CFSET DataT=#Evaluate(varname)#>
<cfoutput>
#DataT#
</cfoutput>
</CFLOOP>

still not pretty but it works

 

[Ayac]

It was very helpful! Thank you!!

 

[webmigit]

A note: I'm gonna have to thank csteinhilber for again and again showing us the better method. You can (quoting) "treat the form scope as a structure, since in fact it is." And access it like this.

<CFSET DataT=ArrayNew(1)>
<CFLOOP index="i" from="1" to="10">
  <cfset varname = "data" & #i#>
  <CFPARAM name="form.#varname#" default="">
  <CFSET DataT[i]=#FORM[varname]#>
  <cfoutput>#DataT[i]#</cfoutput>
</CFLOOP>

This is trivial mostly but I've heard it best to stay away from evaluate when possible.

ALFII.com

http://www.alfii.com

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