Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function

Question

I am trying to call SelectNode from XmlDocument class and trouble due to this error:

Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function.

My code:

   public void Add(ref XmlDocument xmlFormat, String strName)
   {
        XmlDocument dom;
        XSLTemplate xsl = null;
        String strPath = "";
        XmlNodeList nl;
        XmlAttribute na;
        int n;

        nl = (XmlNodeList)xmlFormat.SelectNodes("//xsl:import/@href",nsm);
    }

and xsl:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:import href="stylesheets/r_adresetiket.xsl" />
    <xsl:template match="/">
        <xsl:call-template name="retouradres">
            <xsl:with-param name="_retouradres" select="data/adresetiket/_retouradres" />
            <xsl:with-param name="minofdir" select="data/adresetiket/afzendgegevens/afzendgegevens" />
            <xsl:with-param name="checked" select="data/adresetiket/LB" />
        </xsl:call-template>
    </xsl:template>
</xsl:stylesheet>

Duplicate - https://stackoverflow.com/questions/11202078/namespace-manager-or-xsltcontext-needed-this-query-has-a-prefix-variable-or-u/46373044?noredirect=1#comment93502508_46373044 — vapcguy, Nov 15 '18 at 00:44

score 77 · Accepted Answer · answered Nov 22 '12 at 12:12

You have to add xsl namespace to XmlNamespaceManager:

var document = new XmlDocument();
document.Load(...);
var nsmgr = new XmlNamespaceManager(document.NameTable);
nsmgr.AddNamespace("xsl", "http://www.w3.org/1999/XSL/Transform");

var nl = document.SelectNodes("//xsl:import/@href", nsmgr);

Daniel B · Answer 2 · 2018-11-27T21:33:48.770

32

The document can be traversed by GetElementsByTagName and it doesn't necessarily need using XmlNamespaceManager:

var nodes = document.GetElementsByTagName("xsl:import");
var href =  nodes[0].Attributes["href"];

Fiddle

edited Nov 27 '18 at 21:33

answered Sep 22 '17 at 20:06

Daniel B

3,109
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1

how can you get nested elements given the path lets say "xsl1:elem1/xsl2:elem2" thsi doesn't seem to work? – Marin Aug 20 '19 at 08:24

score 4 · Answer 3 · edited Jan 05 '21 at 12:09

var document = new XmlDocument();
document.LoadXml(rawData);

var nsmgr = new XmlNamespaceManager(document.NameTable);
nsmgr.AddNamespace("cbc", "urn:xxx"); //for example
nsmgr.AddNamespace("cac", "urn:yyy");            

XmlElement xmlElem = document.DocumentElement;
var node = xmlElem.SelectSingleNode("cac:AccountingSupplierParty/cac:Party/cac:PartyIdentification/cbc:ID[@schemeID='VKN']/text()", nsmgr);
var nodeText = node.InnerText;

All namespaces that will be used in XML should be added.
Then you can access the values of the relevant nodes using xpath.

Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function

3 Answers3

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