Archived:How to load and parse XML files

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This application fails when trying to establish a network connection on the N95 (FL 2.0)

It may be failing to load the XML depending uopn the publish settings. If the file is published to use the local files only, it won't load the internet files. If you want to load the network file, you must publish it with 'Use network files' settings. Yet this is good article to get started with the using the XML files in FlashLite. It also explains the sliblings XML structure in a good diagramtic manner.

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Article Metadata

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Compatibility

Platform(s): Flash Lite 2.x

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Article

Created: soueldi (31 May 2007)

Last edited: hamishwillee (14 May 2013)

Warning: This application fails when trying to establish a network connection on the N95 (FL 2.0)

We will be using this basic XML document:

<myPhone>
	<modelName>Nokia N73</modelName>
	<screen>
		<height>240</height>
		<width>320</width>
	</screen>
	<cpu>
		<type>ARM 9</type>
		<clock_rate>220</clock_rate>
	</cpu>
</myPhone>

Loading XML files

This following script loads an XML file:

// create a new XML object
var myPhoneXML = new XML();
 
//Text nodes that contain only white space are discarded
myPhoneXML.ignoreWhite = true;
 
// define the onload handler
myPhoneXML.onLoad = function(success) {
	if (success) {
		trace("XML loaded");
	} else {
		trace("Loading failed");
	}
};
 
// load the XML file into the myPhoneXML object
myPhoneXML.load("myPhone.xml");

• The load() method on the XML object allows you to download data from a remote host.

• When the data has finished downloading, the onLoad event of the XML object occurs.

XML Navigation

• firstChild: The first child in the parent node's child list
  

trace(myPhoneXML.firstChild);
// Output: <myPhone>[...]</myPhone>
 
trace(myPhoneXML.firstChild.firstChild);
// Output: <modelName>[...]</modelName>

• lastChild: The last child in the parent node's child list
  

trace(myPhoneXML.firstChild.lastChild);
// Output: <cpu>[...]</cpu>

• nextSibling: The next node in the parent node's child list

trace(myPhoneXML.firstChild.firstChild.nextSibling);
// Output: <screen>[...]</screen>

• previousSibling: The previous node in the parent node's child list

Getting nodes value

• This example checks the <clock_rate> node value:

trace(myPhoneXML.firstChild.lastChild.lastChild.firstChild.nodeValue);
// Output: 220

• Another example using user XMLNode objects to get the screen resolution

var screenNode:XMLNode = myPhoneXML.firstChild.firstChild.nextSibling;
 
trace("Resolution: " + screenNode.firstChild.firstChild.nodeValue + " x " +
screenNode.lastChild.firstChild.nodeValue);
// Output: Resolution: 240 x 320

• Another example by iterating through the child nodes

for (var aNode:XMLNode = myPhoneXML.firstChild.firstChild.nextSibling.firstChild;aNode != null;aNode=aNode.nextSibling) {
    trace(aNode.firstChild.nodeValue);
}
// Output: 240
//	   320