flex conditional data provider to tree on the basis of list selection

This is my XML data in a file named nodesAndStuff.xml.

<?xml version="1.0" encoding="utf-8"?>
<root>
    <node label="One" />
    <node label="Two" />
    <node label="Three" />
    <node label="Four" />
    <node label="Five" />
    <node label="Six" />
    <node label="Seven" />
    <node label="Eight" />
    <node label="Nine" />
</root>

The component using this data source is an XMLListCollection which is bound to a spark List and the code for that is:

<s:Application name="Spark_List_dataProvider_XML_test"
    xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:s="library://ns.adobe.com/flex/spark"
    xmlns:mx="library://ns.adobe.com/flex/halo"
    initialize="init();">

<fx:Script>
    <![CDATA[
        private function init():void开发者_JAVA百科 {
            xmlListColl.source = nodes.children();
        }
    ]]>
</fx:Script>

<fx:Declarations>
    <fx:XML id="nodes" source="nodesAndStuff.xml" />
</fx:Declarations>

<s:List id="lst"
        labelField="@label"
        horizontalCenter="0" verticalCenter="0">
    <s:dataProvider>
        <s:XMLListCollection id="xmlListColl" />
    </s:dataProvider>
</s:List>

Now I have added my tree just below the list and I have saved counting from 10 to 19 in one.xml, 20 to 29 in two.xml and so on in different XML file. I have no clue how to connect the XML containing counting from 10 to 19 as the single node in tree at the selection of label one in list.

---

There are all sorts of ways to do what you want to do. Keeping in the spirit of your example, I have modified it to do what I think you are asking:

<fx:Script>
    <![CDATA[
        private function init():void {
            processXML(one);
        }

        private function processXML(nodes:XML):void {
            xmlListColl.removeAll();
            xmlListColl.source = nodes.children();
        }

    ]]>
</fx:Script>

<fx:Declarations>
    <fx:XML id="one" source="one.xml" />
    <fx:XML id="two" source="two.xml" />
</fx:Declarations>

<s:List id="lst"
        labelField="@label"
        horizontalCenter="0" verticalCenter="0">
    <s:dataProvider>
        <s:XMLListCollection id="xmlListColl" />
    </s:dataProvider>
</s:List>

<s:Button label="Change" click="processXML(two)" />