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Subject:
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Error with oNodes zXPath in chapter 4
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Posted By:
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chung
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Post Date:
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1/15/2007 8:37:15 AM
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Hi:
I like this book so far but hit a problem in chapter 4, "Cross-Browser XPath", p108.
In file "NameSpaceBooks.htm":
var oRoot = oXmlDom.documentElement;
var sXPath = "na:book/pub:name";
var oNodes = zXPath.selectNodes(oRoot, sXPath, sNameSpace);
if (oNodes.length > 0) {
alert(oNodes.length + " nodes selected with '" + sXPath + "'");
}
oNodes.length returns 0 for me.
The file NameSpaceBooks.htm shows as a blank page in both FF and IE.
NameSpaceBooks.xml is fine as far as I can tell.
I am using * JavaScript zXml Library * Version 1.0.2
Any advice appreciated.
Chung Wang
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Reply By:
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joefawcett
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Reply Date:
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1/15/2007 9:33:01 AM
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There is a slight error in the book regarding how to set namespace mappings for zXml which should be fixed for the next print run.
You need something like:
var namespace1 = "<namespace URI for na here>";
var namespace2 = "<namespace URI for pub here>";
var oNamespaceMapper = {na: namespace1, pub: namespace2};
var oRoot = oXmlDom.documentElement;
var sXPath = "na:book/pub:name";
var oNodes = zXPath.selectNodes(oRoot, sXPath, oNamespaceMapper);
if (oNodes.length > 0)
{
alert(oNodes.length + " nodes selected with '" + sXPath + "'");
}
You will need to replace the namespace declarations with the real ones.
--
Joe (Microsoft MVP - XML)
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