ActionScript 3从网站解析XML

Question

I have tried may example I found here and on the new (Google). Nothing seems to work.

I have a XML file which I get after a call to a website:

<?xml version="1.0" encoding="iso8859-1" ?>
<Database version="1.24" xmlns="http://1234.com">
  <Session>
    <Key>1234</Key>
    <Count>2424</Count>
    <SubExp>Sun Dec  1 00:00:00 2013</SubExp>
    <GMTime>Thu Feb  7 19:38:03 2013</GMTime>
    <Remark>cpu: 0.058s</Remark>
  </Session>
</Database>

OK I loaded into a XML object like so:

var xml:XML = new XML(event.target.data);

Good so far the object contains the XML data:

<Database version="1.24" xmlns="http://1234.com">
      <Session>
        <Key>1234</Key>
        <Count>2424</Count>
        <SubExp>Sun Dec  1 00:00:00 2013</SubExp>
        <GMTime>Thu Feb  7 19:38:03 2013</GMTime>
        <Remark>cpu: 0.058s</Remark>
      </Session>
    </Database>

now I need to read the key value under session so I have tried :

xml.Session.Key
xml.Session[0].Key
xml[0].Session.Key

some of them returns a empty string some just errors either way no data?

so in the Expression window I typed xml[0][0] just to see what happens.

and it returns the key value, however when I place it in my code

var key:String = xml[0][0];
trace(key):

the trace returns the whole XML file? so I'm not sure what I might be missing?

Answer 1

The problem is with the namespace.

Try this:

var xml:XML = new XML(event.target.data);
var ns:Namespace = xml.namespace();
trace(xml.ns::Session.ns::Key);

Also, this can be a bad idea, but when I just want some data and don't care about the namespaces (or they aren't relevant to what I'm doing) I have this handy function to strip them out and return an XML object without them:

public function stripNamespaces(xml:XML):XML {

    const DECLARATION_REG_EXP:RegExp = new RegExp("xmlns[^\"]*\"[^\"]*\"", "gi");

    var namespaceDeclarations:Array = xml.namespaceDeclarations();

    for (var i:int = 0; i < namespaceDeclarations.length; i++) {
        xml.removeNamespace(namespaceDeclarations[i]);
    }

    return new XML(xml.toString().replace(DECLARATION_REG_EXP, ""));        
}

Answer 2

Since your xml has a namespace, you need to tell Flash/e4x to use it:

private var xml:XML =
    <Database version="1.24" xmlns="http://1234.com">
      <Session>
        <Key>1234</Key>
        <Count>2424</Count>
        <SubExp>Sun Dec  1 00:00:00 2013</SubExp>
        <GMTime>Thu Feb  7 19:38:03 2013</GMTime>
        <Remark>cpu: 0.058s</Remark>
      </Session>
    </Database>;

private function onCreationComplete():void
{
    namespace myNameSpace = "http://1234.com";
    use namespace myNameSpace;
    var value:String = xml.Session.Key;
    trace("value:", value); // outputs: value: 1234
}