When you create CFCs, you create methods, which are ColdFusion user-defined functions, in the component page. You pass data to a method by using parameters. The method then performs the function and, if specified in the cfreturn tag, returns data.
You can also define variables in a CFC. Within a CFC, these variables are known as properties.
You use the following tags to create a CFC. You include these tags on the CFML page that defines the CFC.
Tag |
Description |
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Contains a component definition; includes attributes for introspection. For more information, see Building ColdFusion components. |
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Defines a component method (function); includes attributes for introspection. For more information, see Defining component methods. |
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Defines a parameter (argument) to a method; includes attributes for introspection. For more information, see Defining and using method parameters. |
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Defines variables for CFCs that provide web services; also use to document component properties. For more information, see The cfproperty tag. |
A CFC has the following characteristics:
You use the cfcomponent and cffunction tags to create ColdFusion components. By itself, the cffunction tag does not provide functionality. The cfcomponent tag provides an envelope that describes the functionality that you build in CFML and enclose in cffunction tags. The following example shows the skeleton of a component with two methods:
<cfcomponent> <cffunction name="firstMethod"> <!--- CFML code for this method goes here. ---> </cffunction> <cffunction name="secondMethod"> <!--- CFML code for this method goes here. ---> </cffunction> </cfcomponent>