Programming ColdFusion

Name

ParameterExists — Deprecated as of ColdFusion 3.0

Synopsis

ParameterExists(parameter)

Determines if the specified parameter exists. Returns True if the parameter exists or False if it doesn’t. Note that IsDefined( ) should be used instead of ParameterExists( ), as this function has been deprecated. Example:

<CFSET MyVar="Variable">
<CFSET Form.MyFormVar="Form Variable">

<CFOUTPUT>
<CFIF ParameterExists(MyVar)>
  Parameter MyVar exists:<BR>
  MyVar = #MyVar#
<CFELSE>
  No variable called MyVar exists.
</CFIF>
<P>
<CFIF ParameterExists(MyFormVar)>
  Parameter MyFormVar exists:<BR>
  MyFormVar = #MyFormVar#
<CFELSE>
  No variable called MyFormVar exists.
</CFIF>
<P>
<CFIF ParameterExists(Queryname.Field)>
  Variable Queryname.Field exists:<BR>
  QueryName.Field = #Queryname.Field#
<CFELSE>
  No variable called Queryname.Field exists.
</CFIF>
</CFOUTPUT>