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Xmllist Dataprovider To Tree: Nodes Duplicated

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Firstly, apologies because I've e-mailed this question to Larry as well...

Based on pp. 248-249 of Effortless Flex 4: trying to get XML data to display correctly in Tree component, but nodes are duplicated: parent duplicates itself as a child which in turn duplicates itself again as another child.

When I run my xmlData.php script in browser, the hierarchical layout is correct:

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

- <kettles>

- <kettle>

<child>Auto kettle</child>

<child>Salton SSSAK22</child>


- <kettle>

<child>Eon Kettle</child>

<child>Kenwood SJ900</child>


- ...etc.etc...


I'm using HTTPService, XMLList and bind XMLList to my tree component:

<s:HTTPService id="XMLService" url="http://localhost/EE/services/xmlData.php" method="GET" resultFormat="e4x" result="getXMLDataResult(event)"/>


private var XMLDataList:XMLList;

private function getXMLDataResult(event:ResultEvent):void{



<mx:Tree id="applTree" creationComplete="XMLService.send()"

dragEnabled="true" labelField="child" dataProvider="{XMLDataList}" dragStart="tree_dragStartHandler(event)"/>


I URGENTLY need to get rid of the duplication. Please help!! Thanks.

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That's okay. It's when people post in the forum and then email that's annoying. As for your issue, kudos for validating the XML output. I believe the solution is to change this:




And/or set the showRoot property on the Tree to false. I don't have the time at this moment to test these myself, but I'm fairly sure it's one of those changes that will do the trick.

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Hi, thanks very much for your reply. Unfortunately no joy :(

When I use: XMLDataList=event.result.kettles.kettle; nothing displays - just a blank.

I also set the showRoot property on the Tree to false but still no difference.

Will appreciate any further suggestions.


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  • 2 months later...

Okay, the easy solution is to change the XML, if that's an option. If not, I think you're either going to have create a custom data renderer or convert the raw XML to a more usable format.


I think my problem is with the php script that generates the XML data for my tree component. I think I need a package (from PEAR) called Query2XML to generate XML from a sql query.

However, when I try and install the package on my wampserver 2.0 via the commandline:

c:\wamp\bin\php\php5.3.0>pear install XML_Query2XML-1.7.1,


I get the following error 'failed to mkdir C:\php5\pear\docs\XML_Query2XML\cases\case01


And as a test: if I try and run in my browser the following php script:



require_once 'XML/Query2XML.php';

require_once ('PEAR/Exception.php');

require_once 'DB.php';

$db = DB::connect('mysql://root@localhost/Query2XML_Tests');

$query2xml = XML_Query2XML::factory($db);



I get this error:

Warning: require_once(XML/Query2XML.php) [function.require-once]: failed to open stream: No such file or directory in C:\wamp\www\try.php on line 2


Fatal error: require_once() [function.require]: Failed opening required 'XML/Query2XML.php' (include_path='.;C:\php5\pear') in C:\wamp\www\try.php on line 2



I really need to get the xml data via sql and php into a tree component and I reckon I need to use the sql to xml query. What am I doing wrong???


Can you please help? Thanks a lot. :(

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Well, your PEAR installation failed, so any use of that PEAR class will also fail. This is likely a permissions issue and perhaps caused by the fact that you're trying to install PEAR into C:\php5 when PHP and everything is within C:\wamp.

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