How to extract the namespace from xml and declare one if none

Question

Hi,

I have the following xml :

<?xml version="1.0" encoding="utf-8" standalone="no"?>
<container xmlns="urn:oasis:names:tc:opendocument:xmlns:container" version="1.0">
	<rootfiles>
		<rootfile full-path="EPUB/package.opf" media-type="application/oebps-package+xml"/>
	</rootfiles>
</container>

and basically I need to extract < rootfile > information, so I did this :

private static string xmlText = 
            "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>" +
            "<container xmlns=\"urn:oasis:names:tc:opendocument:xmlns:container\" version=\"1.0\">" +
            	"<rootfiles>" +
            		"<rootfile full-path=\"EPUB/package.opf\" media-type=\"application/oebps-package+xml\"/>" +
            	"</rootfiles>" +
            "</container>";

        private void TestXml()
        {
            XmlLoadSettings xmlSettings = new XmlLoadSettings();
            xmlSettings.ElementContentWhiteSpace = false;
            xmlSettings.MaxElementDepth = 100;
            xmlSettings.ResolveExternals = true;
            xmlSettings.ValidateOnParse = false;

            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.LoadXml(xmlText, xmlSettings);
            var nsUri = xmlDoc.NamespaceUri;
            var pkgNodes = xmlDoc.SelectNodesNS("/ocf:container/ocf:rootfiles/ocf:rootfile", "xmlns:ocf=\"urn:oasis:names:tc:opendocument:xmlns:container\"");
            foreach(var pkgNode in pkgNodes)
            {
                IXmlNode xmlNode;
		        xmlNode = pkgNode.Attributes.GetNamedItem("full-path");
		        String full_path = (xmlNode != null)? xmlNode.InnerText : null;
            }
            
        }

However the namespace might not be present, so how can I get the xmlns if available and declare one by default if it's not

to be able to handle both case with the same code ?

Thanks

Answer 1

You should be able to ignore the NS

---

Jeff Sanders (MSFT)

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