User Guide

1064 Chapter 7: ColdFusion C++ CFX Reference
Example
The following example adds a query named 'People' to the calling template. The query has two
columns ('FirstName' and 'LastName') and two rows:
// Create a string set and add the column names to it
CCFXStringSet* pColumns = pRequest->CreateStringSet() ;
int iFirstName = pColumns->AddString( "FirstName" ) ;
int iLastName = pColumns->AddString( "LastName" ) ;
// Create a query that contains these columns
CCFXQuery* pQuery = pRequest->AddQuery( "People", pColumns ) ;
// Add data to the query
int iRow ;
iRow = pQuery->AddRow() ;
pQuery->SetData( iRow, iFirstName, "John" ) ;
pQuery->SetData( iRow, iLastName, "Smith" ) ;
iRow = pQuery->AddRow() ;
pQuery->SetData( iRow, iFirstName, "Jane" ) ;
pQuery->SetData( iRow, iLastName, "Doe" ) ;
CCFXRequest::AttributeExists
Syntax
BOOL CCFXRequest::AttributeExists(LPCSTR lpszName)
Description
Checks whether the parameter was passed to the tag. Returns True if the parameter is available;
False, otherwise.
Parameters
Example
The following example checks whether the user passed an attribute named DESTINATION to the
tag, and throws an exception if the attribute was not passed:
if ( pRequest->AttributeExists("DESTINATION")==FALSE )
{
pRequest->ThrowException(
"Missing DESTINATION parameter",
"You must pass a DESTINATION parameter in "
"order for this tag to work correctly." ) ;
}
Parameter Description
lpszName Name of the parameter to check (case insensitive)