Re: Node.prototype.selectNodes function problems

[email protected] wrote:

> I'm trying to create a javascript application that uses data returned
> from a (ASP.NET) webservice. I want a cross-browser (IE/Mozilla)
> solution for this. The webservice data loads fine into a document, but
> then I want to use XPath to select particular nodes in this document.
> IE has a selectNodes function for this, so I want to create this
> function for Mozilla as well. I have the following for Mozilla:
> 
> Node.prototype.selectNodes = function(sExpr)
> {
>   //DOCUMENT_NODE = 9
>   var doc = this.nodeType == 9 ? this : this.ownerDocument;
> 
>   var nsRes = doc.createNSResolver(this.nodeType == 9 ?
> this.documentElement : this);
> 
>   var xpRes = doc.evaluate(sExpr, this, nsRes, 5, null);
> 
>   var res = [];
>   var item;
>   while (item = xpRes.iterateNext())
>     res.push(item);
>   return res;
> }
> 
> When I use the Mozilla javascript debugger on this piece of code and
> the doc.evaluate statement has been executed, the xpRes variable
> contains a lot of XPathExceptions, with the following value: "The
> expression cannot be converted to return the specified type."

How does the XPath expression look, how does the XML document look, 
which node are you calling the method on?


-- 

	Martin Honnen
	http://JavaScript.FAQTs.com/