Using web service in Flex

I just tried out web service in Flex 3. This example is discussed in ActionScript 3.0 Cookbook. Here follows the complete source code.

<?xml version=”1.0″ encoding=”utf-8″?>
<mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml” layout=”absolute” creationComplete=”fnCreationComplete()”>
<mx:Script>
            <![CDATA[
                        import mx.rpc.soap.WebService;
                        import mx.rpc.soap.LoadEvent;
                        import mx.rpc.Fault;
                        import mx.rpc.events.ResultEvent;
                        import mx.rpc.events.FaultEvent;
                        import mx.controls.Alert;

                        private var webService:WebService;

                        private function fnCreationComplete():void{
                                    webService = new WebService();
                                    webService.wsdl="http://www.rightactionscript.com/webservices/FlashSurvey.php?wsdl";
                                    webService.addEventListener(LoadEvent.LOAD, onWSDL);
                                    webService.getAverages.addEventListener(ResultEvent.RESULT, onGetAverages);
                                    webService.loadWSDL();
                                    webService.getAverages.addEventListener(FaultEvent.FAULT, onFaultGetAverages);
                        }

                        private function onGetAverages(event:ResultEvent):void{
                                    textArea.text = "The averages for Flash and ActionScript are " + event.result.flash + " and " + event.result.actionscript;

                        }

                        private function onFaultGetAverages(e:FaultEvent):void{
                                    Alert.show("Fault string"+e.fault.faultString);
                        }

                        private function onWSDL(loadEvent:LoadEvent):void{
                                    webService.getAverages();
                        }
            ]]>
</mx:Script>
<mx:TextArea id=”textArea” x=”59″ y=”60″ width=”339″ height=”185″/>
</mx:Application>

Before we load the wsdl we are adding a event listener to it. So as soon as the wsdl is loaded the listener function is called and it calls a function  getAverages() from web service and it returns two values flash and actionscript which we are displaying in a text field from onGetAverages() a listener function.