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    XPath

    Notes and sample code for XPath and Ajax

    (The following was moved from document.evaluate)

    obj.evaluate(xpathExpression,contextNode,namespaceResolver,resultType,result);
    
    //obj and contextNode should be the same object, if context is a ajax xml object (example: returnedXML) 
     this should be used as :
    
     returnedXML.evaluate(xpathExpression,returnedXML,namespaceResolver,returnType,result); 
    
    //contextNode should be used in the one in which it was created
    
    //add by mooring 2008-11-15 16:00 china
    
    
    
    
    
    
    
    var xhr = new Ajax('post','demo.xml',parseXML,'xml');
    //Ajax is a class written by javascript  which return responseXML object to parseXML function
    function parseXML(obj)//obj is the returnXML object now
    {
    if(!obj.documentElement)
    {
    alert("Your Browser does't support this script!");
    return;
    }

    var fields = [];//store the results
    if(window.ActiveXObject)
    {
    var tobj = obj.documentElement.selectNodes("/root/field/item");
    for(var i=0;i<tobj.length; i++)
    {
    fields.push(tobj[i].text);
    }
    }
    else
    {
    var tobj = obj.evaluate("/root/field/item",obj.documentElement,null, XPathResult.ANY_TYPE, null);
    var tmp = tobj.iterateNext();
    while(tmp)
    {
    fields.push(tmp.textContent);
    tmp = tobj.iterateNext();
    }
    } alert(fields);
    }
    //here is the demo xml file for xpath
    <?xml version="1.0"?>
    <root>
    <field>
    <item>Art_Id</item>
    <item>PSection</item>
    <item>Qkind</item>
    <item>Qtitle</item>
    <item>Question</item>
    <item>Pic</item>
    <item>Answer1</item>
    <item>Answer2</item>
    <item>Answer3</item>
    <item>Answer4</item>
    </field>
    </root>

    //add by mooring 2008-11-15 16:16 china

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    Contributors to this page: Brettz9, wbamberg
    Last updated by: wbamberg,
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