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Using xpath to produce and display parent and its child?

Posted on 2013-11-03
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Last Modified: 2013-11-08
HTML
 
      <div id="nav"></div>
       <ul>
         <li><span id="parent" >main</span></li>
         <li><span id="chapter">chapter</span></li>
         <li><span id="subchapter">subchapter</span></li>
       </ul>
       <div id="result"> 
        
      </div>

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XML:

   
   
<section id="parent">
    	<data>main</data>
    	<chapter id="chapter">
    		<data>Chapter 1</data>
    		<subchapter id="subchapter">
    			<data>Subchapter 1.1</data>
    			<topic id="634322">
    				<data>Topic A</data>
    				<paragraph id="2373" level="1">example1</paragraph>
    				<paragraph id="3438" level="2">example2.</paragraph>
    				<paragraph id="4549" level="1">exampl3</paragraph>
    			</topic>
                   </subchapter>
               ....
    	</chapter>
         ...
    </section>
    ....

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Using Xpath and javascript or jquery to produce (id of nav map to id of xml):

on click `id=parent` or `chapter` or `subchapter` get and display:
       main
         chapter
           Subchapter 1.1
             Topic A
               example1
                 example2
               exampl3

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      main
         chapter
           Subchapter 1.1
             Topic A
               example1
                 example2
               exampl3


How can I get this the above result using xpath then display result on `<div id="result">`

thanks
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Question by:pelnisgproup
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1 Comment
 
LVL 30

Accepted Solution

by:
Alexandre Simões earned 1500 total points
ID: 39621202
So you're making an ajax call on each node expansion to get it's children is that?
In response you get XML and want to parse it so that you'll be able to inject the new nodes under the parent... correct?

My first question is: Can't you return json instead of XML?
Dealing with XML in javascript is slow and a mess...
http://www.w3schools.com/xml/xml_parser.asp

Basically you can parse your response xml string like:
var txt = '-> XML String goes here <-';
var xmlDoc;
if (window.DOMParser)
  {
  var parser=new DOMParser();
  xmlDoc=parser.parseFromString(txt,"text/xml");
  }
else // Internet Explorer
  {
  xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
  xmlDoc.async=false;
  xmlDoc.loadXML(txt);
  } 

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after this, xmlDoc will contain the structure of your XML data and you can access it normally with the dot notation.
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