Question

querying xml file using xpath in javascript

Asked by: r_pat72

I have a xml file like this.
<salesloc name="Australia" area="APAC">
  <useralias>timz</useralias>
  <useralias>scott</useralias>
</salesloc>
<salesloc name="italy" area="WE">
  <useralias>david</useralias>
  <useralias>tabz</useralias>
</salesloc>

I want to load this xml in javascript and wants to check for salesloc italy, useralias "david" exist or not?
ie I have javasctipt variable called salesloc and useralias. I want to check these two variables againest this xml file wheather they are exist?

Please help.

Thanks.

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Asked On
2009-03-24 at 19:25:23ID24261833
Tags

XML

,

xpath

,

Javascript

Topics

XPath

,

JavaScript

Participating Experts
1
Points
500
Comments
6

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Answers

 

by: ryancysPosted on 2009-03-24 at 20:46:05ID: 23975903

Possible to amend the xml file to this?

<?xml version="1.0" encoding="utf-8"?>
<sales>
<salesloc name="Australia" area="APAC">
  <useralias>timz</useralias>
  <useralias>scott</useralias>  
</salesloc>
<salesloc name="italy" area="WE">
  <useralias>david</useralias>
  <useralias>tabz</useralias>
</salesloc>
</sales>

then:

<html>
<head></head>
<script language="javascript">
	var xmlDoc = null;
 
	function loadIndex() {
		var xmlfile = "myxml.xml";
		if (document.implementation && document.implementation.createDocument) {
			xmlDoc = document.implementation.createDocument("", "", null);
			xmlDoc.load(xmlfile);
		} else if (window.ActiveXObject) { // MSIE uses ActiveX
			xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
			xmlDoc.async = false;
			xmlDoc.load(xmlfile);
		}
	}
	
	function searchIndex(frm) { // search the index
		var salesloc = frm.ctry.options[frm.ctry.selectedIndex].value;
		var useralias = frm.useralias.value;
		
		var xpath="/sales/salesloc[@name='"+salesloc+"']/useralias[.='"+useralias+"']";
		var isfound = false;
		
		if (window.ActiveXObject) {
			var nodes=xmlDoc.selectNodes(xpath);
			isfound = (nodes.length>0);	
			/*
			for (i=0;i<nodes.length;i++) {
				document.write(nodes[i].childNodes[0].nodeValue);
		  		document.write("<br />");
			}*/
		} else if (document.implementation && document.implementation.createDocument) {
			var nodes=xmlDoc.evaluate(xpath, xmlDoc, null, XPathResult.ANY_TYPE,null);
			var result=nodes.iterateNext();
			isfound = (result);
			/*
			while(result) {
				document.write(result.childNodes[0].nodeValue);
				document.write("<br />");
				result=nodes.iterateNext();
		  	}*/
		}
		
		if (!isfound) {
			alert("Sorry, data not found.");
		} else {
			alert("Yes, data found.");	
		}
		return false;
	}
</script>
<body onLoad="loadIndex()">
<form action="" method="post" onSubmit="return searchIndex(this)">
   Find: 
     <select name="ctry" id="ctry">
       <option value="Australia">Australia</option>
	   <option value="italy">italy</option>
     </select>
  <input name="useralias" type="text" id="useralias">
   <input type="submit" name="Submit" value="Submit">
</form>
</body>
</html>	

                                              
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by: r_pat72Posted on 2009-03-24 at 22:35:38ID: 23976319

hi,

I am entering Australia and timz, but getting alert "sorry, no data found".
When I checked, nodes.length, it is coming length=0.

It should say "Yes, data found". Could you please check your above code.

Thanks.

 

by: ryancysPosted on 2009-03-24 at 23:44:30ID: 23976539

Make sure the xml filename is correct?

>>var xmlfile = "myxml.xml";

try change that accordingly.

 

by: r_pat72Posted on 2009-03-25 at 09:30:41ID: 23981515

here is the code. I have kept the file in c:\test folder.

<html>
<head></head>
<script language="javascript">
      var xmlDoc = null;
 
      function loadIndex() {
            var xmlfile = "c:\test\myxml.xml";
            if (document.implementation && document.implementation.createDocument) {
                  xmlDoc = document.implementation.createDocument("", "", null);
                  xmlDoc.load(xmlfile);
            } else if (window.ActiveXObject) { // MSIE uses ActiveX
                  xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
                  xmlDoc.async = false;
                  xmlDoc.load(xmlfile);
            }
      }
      
      function searchIndex(frm) { // search the index
            var salesloc = frm.ctry.options[frm.ctry.selectedIndex].value;
            var useralias = frm.useralias.value;
            alert(salesloc)
            alert(useralias)

            var xpath="sales/salesloc[@name='"+salesloc+"']/useralias[.='"+useralias+"']";
            var isfound = false;
                 alert(xpath)
            
            if (window.ActiveXObject) {
                  var nodes=xmlDoc.selectNodes(xpath);
                        alert(nodes.length);
                  isfound = (nodes.length>0);      
                  /*
                  for (i=0;i<nodes.length;i++) {
                        document.write(nodes[i].childNodes[0].nodeValue);
                          document.write("<br />");
                  }*/
            } else if (document.implementation && document.implementation.createDocument) {
                  var nodes=xmlDoc.evaluate(xpath, xmlDoc, null, XPathResult.ANY_TYPE,null);
                  var result=nodes.iterateNext();
                  isfound = (result);
                  /*
                  while(result) {
                        document.write(result.childNodes[0].nodeValue);
                        document.write("<br />");
                        result=nodes.iterateNext();
                    }*/
            }
            
            if (!isfound) {
                  alert("Sorry, data not found.");
            } else {
                  alert("Yes, data found.");      
            }
            return false;
      }
</script>
<body onLoad="loadIndex()">
<form action="" method="post" onSubmit="return searchIndex(this)">
   Find:
     <select name="ctry" id="ctry">
       <option value="Australia">Australia</option>
         <option value="italy">italy</option>
     </select>
  <input name="useralias" type="text" id="useralias">
   <input type="submit" name="Submit" value="Submit">
</form>
</body>
</html>      

But not getting the result.
 

 

by: r_pat72Posted on 2009-03-25 at 10:30:36ID: 23982282

I have changed to c:\\test\\myxml.xml. Then it worked. But one more thing I want to test ie if just I pass useralias as a parameter to see if that user exist in multiple sales location, how can I see that?

 

by: r_pat72Posted on 2009-03-25 at 13:29:05ID: 23984326

Thanks, I modified the above code for the user to see if they exist in multiple location.

var xpath="sales/salesloc/useralias[.='"+useralias+"']";

This worked.

Thanks a lot for your help.

20120131-EE-VQP-002

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