isDefined throws an error

[mrsbean]

I am a CF newbie, but fairly well versed in other things like PHP. I tried to use isDefined to tell me whether or not a variable had been declared. If it had not yet been declared, I wanted to give it a value, otherwise, I wanted to use the value that was called by a link which led to the page.

It seems frustrating to me that I can't do this, so there must be some other way to think of it.

  	  <cfif isDefined("#imv#")>
	  <cfelse>
	<cfset #imv# = 0>
	</cfif>
	  <tr><td valign="top"><a href="index.cfm?template=ec_category_edit_1&form_cat_id=1&imv=1"><img src="images/arrow.gif" align="left" class="arrowcss" /></a></td>
	  <td valign="top">Image Map(?)&nbsp;</td>
	  <td>
	  <cfif #imv# EQ 1>
	  <textarea  name="imageMap" cols="50" rows="5" id="imageMap"></textarea>
		</cfif>
		</td></tr>

Thanks in advance for any assistance.

MrsBean

 

[ecobb]

Remove the output signs:

<cfif isDefined("imv")>

You don't need output signs inside of a cf tag, so you can even remove them from your cfif and cfset statements.

<cfset imv = 0>

<cfif imv EQ 1>

By the way, what you're trying to do:

I tried to use isDefined to tell me whether or not a variable had been declared. If it had not yet been declared, I wanted to give it a value, otherwise, I wanted to use the value that was called by a link which led to the page.

would be much easier by using cfparam. The following cfparam tag could replace the entire <cfif><cfelse><cfif> block that your currently using.

<cfparam name="imv" default="0">

Hope This Helps!

ECAR
ECAR Technologies

http://www.ecartech.com

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