The followig example shows how you can pass parameters to an HTTPService by passing an Object in the HTTPService’s send() method. The remote ColdFusion script is a simple “hello world” type script which accepts a single parameter, “name”, and returns a single parameter, “welcomeMessage”.

 



 
 
 <?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

layout="vertical"

verticalAlign="middle"

backgroundColor="white">



<mx:Script>

<![CDATA[

import mx.controls.Alert;

import mx.events.ValidationResultEvent;

import mx.utils.StringUtil;



private function submit_click(evt:MouseEvent):void {

var result:ValidationResultEvent = stringValidator.validate();

var params:Object = {};



lbl.text = "";



switch (result.type) {

case ValidationResultEvent.INVALID:

Alert.show(result.message, result.type);

break;

case ValidationResultEvent.VALID:

params["name"] = StringUtil.trim(firstName.text);

httpServ.send(params);

break;

}

}

]]>

</mx:Script>



<mx:StringValidator id="stringValidator"

source="{firstName}"

property="text"

minLength="2"

maxLength="{firstName.maxChars}" />



<mx:HTTPService id="httpServ">

<mx:resultFormat>flashvars</mx:resultFormat>

<mx:url>http://www.flash-mx.com/mm/greeting.cfm</mx:url>

<mx:result>lbl.text = httpServ.lastResult.welcomeMessage;</mx:result>

<mx:fault>Alert.show(event.toString(), event.type);</mx:fault>

</mx:HTTPService>



<mx:ApplicationControlBar dock="true">

<mx:Form>

<mx:FormItem label="Name:" required="true"

direction="horizontal">

<mx:TextInput id="firstName"

maxChars="20" />

<mx:Button label="Submit"

click="submit_click(event);" />

</mx:FormItem>

</mx:Form>

</mx:ApplicationControlBar>

<mx:Label id="lbl" fontSize="32" />

</mx:Application>