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4 CHAPTER 30 Extending ColdFusion with CFX

Table 30.3 C++ Methods for Working with Attributes

METHOD DESCRIPTION

pRequest->AttributeExists(lpszName) Determines whether the speciﬁed attribute was

actually passed to the CFX tag. Returns a BOOL.

pRequest->GetAttribute(lpszName) Returns the value of the speciﬁed attribute, as it

was passed to the CFX tag. Note that all attribute

values are received by the CFX as

LPCSTR

string values.

pRequest->GetAttributeList() Returns the names of all attributes that were

actually passed to the CFX tag. The names are

returned as a

CFXStringSet, which is similar to

an array of strings.

Returning Variables and Text

Your CFX tag has the ability to include dynamically generated content in the ColdFusion page that

is calling the tag. It can also return variables to the calling page. Table 30.4 shows the Java methods

for these tasks, and Table 30.5 shows the C++ version.

Table 30.4 Java Methods for Returning Variables and Text

METHOD DESCRIPTION

request.setVariable(name, value) Returns a variable to ColdFusion with the

speciﬁed

name and value. Both name and value

must be speciﬁed as strings.

request.write(text) Includes text in the current page, just as if the

text was generated by a

<cfoutput> block. The

text must be speciﬁed as a string.

Table 30.5 C++ Methods for Returning Variables and Text

METHOD DESCRIPTION

pRequest->SetVariable(name, value) Returns a variable to ColdFusion with the

speciﬁed

name and value. Both must be speciﬁed

LPCSTR compatible values.

pRequest->Write(text) Includes text in the current page, just as if the

text was generated by a

<cfoutput> block. The

text must be speciﬁed as a

LPCSTR compatible

value.

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