Actionscript按子节点过滤xml'；s属性

as4新手，正在尝试找出如何通过子节点的属性过滤xml。类似下面的内容

<root>
<level1 id="1">
    <level2>
        <sample class="C1" />
        <sample class="C2" />
        <sample class="C3" />
    </level2>
</level1>
<level1 id="2">
    <level2>
        <sample class="C1" />
        <sample class="C3" />
    </level2>
</level1>
<level1 id="3">
    <level2>
        <sample class="C1" />
    </level2>
</level1>
<level1 id="3">
    <level2>
        <sample class="C2" />
    </level2>
</level1>
</root>

目标是获得包含class=“C1”示例的LEVEL1和LEVEL2的列表。类似以下内容的内容作为结果XMLList

<root>
<level1 id="1">
    <level2>
        <sample class="C1" />
        <sample class="C2" />
        <sample class="C3" />
    </level2>
</level1>
<level1 id="2">
    <level2>
        <sample class="C1" />
        <sample class="C3" />
    </level2>
</level1>
<level1 id="3">
    <level2>
        <sample class="C1" />
    </level2>
</level1>
</root>

或

在Actionscript 3.0中：

var xmlLoader:URLLoader = new URLLoader();
var xmlData:XML = new XML();
 
xmlLoader.addEventListener(Event.COMPLETE, LoadXML);
 
xmlLoader.load(new URLRequest("put-your-link-to-your-xml-file-here"));
 
function LoadXML(e:Event):void {

xmlData = new XML(e.target.data);

trace(xmlData); // traces the raw data
trace(root.level1.level2); // traces level 2
trace(root.level1.level2.text()); // can trace the text node of level 2, kind of similar
trace(root.level1.@class); // traces the "class" attribute inside level 1

var level-1-List:XMLList = root.level1; //gets an array of all level1

for each (var itemElement:XML in level-1-List) {

trace(itemElement); // loop through list and trace it

}
}

---

我会这样做：

var xmlLoader:URLLoader = new URLLoader();
var xmlData:XML = new XML(); 
xmlLoader.addEventListener(Event.COMPLETE, parseXML);
xmlLoader.load(new URLRequest("put-your-link-to-your-xml-file-here"));

     function parseXML(e:Event):void {

     xmlData = new XML(e.target.data);
     xmlData.ignoreWhiteSpace = xmlData.ignoreComments = true;

     var xmlList:XMLList = new XMLList();
     var i:uint = 0;
     var l:uint = xmlData.level1.length();
     while(i<l)
     {
         var j:uint = 0;
         var m:uint = xml.level1[i].level2.sample.length();
         while(j<m)
         {
             if(xml.level1[i].level2.sample[j].@cls == "C1")
             {
                 xmlList += xml.level1[i];
                 break;
             }
             ++j;
         }
         ++i;
     }
     trace(xmlList);

var-xmlLoader:URLLoader=new-URLLoader（）；
var xmlData:XML=newxml（）；
addEventListener（Event.COMPLETE，parseXML）；
load（新的URLRequest（“在此处放置指向xml文件的链接”）；
函数parseXML（e:Event）：void{
xmlData=新的XML（e.target.data）；
xmlData.ignoreWhiteSpace=xmlData.ignoreComments=true；
var xmlList:xmlList=new xmlList（）；
变量i:uint=0；
var l:uint=xmlData.level1.length（）；
而（我是“as4”？也许你在AS3中想到了E4X？你好，Eatdoku，你有更近的距离吗？
var xmlLoader:URLLoader = new URLLoader();
var xmlData:XML = new XML(); 
xmlLoader.addEventListener(Event.COMPLETE, parseXML);
xmlLoader.load(new URLRequest("put-your-link-to-your-xml-file-here"));

     function parseXML(e:Event):void {

     xmlData = new XML(e.target.data);
     xmlData.ignoreWhiteSpace = xmlData.ignoreComments = true;

     var xmlList:XMLList = new XMLList();
     var i:uint = 0;
     var l:uint = xmlData.level1.length();
     while(i<l)
     {
         var j:uint = 0;
         var m:uint = xml.level1[i].level2.sample.length();
         while(j<m)
         {
             if(xml.level1[i].level2.sample[j].@cls == "C1")
             {
                 xmlList += xml.level1[i];
                 break;
             }
             ++j;
         }
         ++i;
     }
     trace(xmlList);