Or actually, if the variable isn't even created you'll have to:
<cfif isDefined("Recordset2.Total")>
<cfoutput><cfset newTotal =(Recordset2.TOTAL - Recordset1.TOTAL)>#newTotal#
</cfoutput>
<cfelse>
Statements to deal with when the value is null
</cfif>
-----Original Message-----
From: Mark Smyth
Sent: 07 August 2001 09:52
To: CF-Talk
Subject: RE: Subtract Null = Error
HI
Something like this should do it
Depending whether the variable is null or has a value cf will evaulate which
one to use automatically
<cfif Recordset2.Total is "NULL">
Statements to deal with when the value is null
<cfelse>
<cfoutput><cfset newTotal =(Recordset2.TOTAL - Recordset1.TOTAL)>#newTotal#
</cfoutput>
</cfif>
regards
Mark Smyth
Macromedia Certified ColdFusion Developer
Systems Union eBusiness Solutions
00 44 1865 880800
-----Original Message-----
From: Gryphawk [mailto:[EMAIL PROTECTED]]
Sent: 07 August 2001 09:41
To: CF-Talk
Subject: Subtract Null = Error
Hi there
I was hoping you could help me with a problem - I have a calculated value
from the following code:
<cfoutput><cfset newTotal =(Recordset2.TOTAL - Recordset1.TOTAL)>#newTotal#
</cfoutput>
Which works just fine when the Recordset2.TOTAL and Recordset1.TOTAL are
populated by the SQL (as set by search parameters on a previous page).
However, on occasion Recordset2.Total is equal to nothing (null?) while
Recordset1.TOTAL has a value due to the search string, and when this
happens, CF throws an error which reads:
"An error occurred while evaluating the expression:
newTotal =(Recordset2.TOTAL - Recordset1.TOTAL)
Error near line 316, column 17.
Cannot convert to number."
Is there anyway to get around this such as an If Recordset.TOTAL = nothing,
Then [don't subtract]?
My apologies that I am only just starting to learn how to write coded stuff.
Many thanks,
Gryphawk
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