HTTPService/XML issue

Question

Hey fellow Flexers
I'm a relative newb to Flex so there is probably a simple
solution to my issue, but I've been trying to fix this for hours
now with no success.
I'm loading in some XML using HTTPService and accessing the
parameters without any issue, it's the node value I have issues
with.
The XML is in the following format:
<events>
<comment up="1">Some text goes here 1</comment>
<comment up="3">Some text goes here 2</comment>
</events>
Now, with my current code I can access the 'up' parameter,
but I can't seem to get to the actual node value. i.e "Some text
goes here.."
My code:
<mx:HTTPService id="dataRequest" url=myURL/>
<mx:Panel>
<mx:DataGrid
dataProvider="{dataRequest.lastResult.events.comment}">
<mx:columns>
<mx:DataGridColumn headerText="Title"
dataField="comment"/> <<**this line is the issue**
<mx:DataGridColumn headerText="Up" dataField="up"/>
<< this line works fine
</mx:columns>
</mx:DataGrid>
<mx:Panel>
I've chopped out some of the code to make it readable. I know
that the code is incorrect but I've tried dozens of variations to
get it working but I'm having no joy.
Any ideas?
Thanks in advance.
Paul

Answer 1

Suggestions:
1) Use resultFormat="e4x" on the HTTPService tag. The default
is object, which causes Flex to convert the xml into a nested
object structure. God only knows the result of that.
2) Do not bind to the result. Use a result handler, so you
can debug the data.
Here are some code snippets below.
Tracy
Sample code using HTTPService, e4x, handler function to
populate a list item.
Also shows usage of AsyncToken.
The DataGrid tag:
<mx:DataGrid id="dg" dataProvider="{_xlcMyListData}"
.../>
The HTTPService tag:
<mx:HTTPService id="service" resultFormat="e4x"
result="onResult(event)" fault="..../>
Script block declaration:
import mx.rpc.Events.ResultEvent;
[Bindable]private var _xlcMyListData:XMLListCollection;
Invoke send:
var oRequest:Object = new Object();
oRequest.Arg1 = "value1";
var callToken:AsyncToken = service.send(oRequest);
token.callId = "myQuery1";
Result Handler function:
private function onResult(oEvent:ResultEvent):void {
var xmlResult:XML = XML(event.result); //converts result
Object to XML. can also use "as" operator
var xlMyListData:XMLList = xmlResult.myListData; //depends
on xml format, is row data
_xlcMyListData = new XMLListCollection(xlMyListData); //wrap
the XMLList in a collection
trace(_xlcMyListData.toXMLString()); //so you can see
exactly how to specify dataField or build labelFunction
var callToken:AsyncToken = oEvent.token;
var sCallId = callToken.callId; //"myQuery1"
switch(sCallId) {
case "myQuery1":
doQuery2();
break;
}//onResult