User Guide

Table Of Contents

118 Chapter 6: Using Flash Remoting with ColdFusion MX

To simplify the debugging of your ColdFusion code, use the cftry and cfcatch tags in your

ColdFusion page or component to catch errors and return helpful error messages about the errors

to the Flash application. For example, the ColdFusion page causeError.cfm contains the following

code:

<cftry>

</cfcatch>

</cftry>

In this example, the second cfset tag fails because it causes a divide-by-zero error. The message

attribute of the

cfthrow tag describes the error; ColdFusion returns this attribute to the Flash

application. For more information on using the

cftry and cfcatch tags, see Developing

ColdFusion MX Applications with CFML.

To handle the error in your Flash application, you create a fault handler for the

causeError()

method, as follows:

import mx.rpc.FaultEvent;

//…

function causeError_Fault ( fault:FaultEvent ):Void

{

resultBox.text = fault.fault.faultstring;

}

In this example, resultBox is a Flash text box that displays the error message created by the

cfthrow tag.

For more information on handling errors, see Chapter 2, “Using Flash Remoting ActionScript,”

on page 29.