Is catalog misspelled?
categories = event.result.catelog.category;
If there's no catelog child of the XML root, then trying to access a
child of that node will probably throw the error.
Doug
Roger Ross wrote:
Hello,
Working my way throught the "Training From the Source" turorial and
ran into this error message.
Not sure why I am getting it. I compared my code to the completed code
for the lesson and it looks the same with no problems when I compile it.
TypeError: Error #1009: Cannot access a property or method of a null
object reference.
at Dashboard/::catHandler()
at Dashboard/__catRPC_result()
at
flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.rpc.http.mxml::HTTPService/http://www.adobe.com/2006/flex/mx/internal::dispatchRpcEvent
<http://www.adobe.com/2006/flex/mx/internal::dispatchRpcEvent>()
at
mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::resultHandler
<http://www.adobe.com/2006/flex/mx/internal::resultHandler>()
at mx.rpc::Responder/result()
at mx.rpc::AsyncRequest/acknowledge()
at ::DirectHTTPMessageResponder/completeHandler()
at
flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at flash.net::URLLoader/flash.net:URLLoader::onComplete()
Here is a copy of the code that it has me write with the comboBox that
is to receive the data:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml
<http://www.adobe.com/2006/mxml>"
layout="horizontal"
creationComplete="catRPC.send()">
<mx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
[Bindable]
private var categories:ArrayCollection=new ArrayCollection();
private function catHandler(event:ResultEvent):void{
categories = event.result.catelog.category;
var catObj:Object = new Object();
catObj.name = "All";
catObj.categoryID = 0;
categories.addItemAt(catObj, 0);
catCombo.selectedIndex = 0;
}
]]>
</mx:Script>
<mx:HTTPService id="catRPC"
url="http://www.flexgrocer.com/category.xml
<http://www.flexgrocer.com/category.xml>"
result="catHandler(event)"/>
<mx:ComboBox id="catCombo"
dataProvider="{categories}"
labelField="name"/>
Any Idea's...
Thanks,
Roger
