How to create XML containing namespace declarations and prefixed names with an XmlDocument?

Question

I am struggling to output the following XML using the XmlDocument object in .NET. Any suggestions?

This is what I would like to output...

<l:config
    xmlns:l="urn:LonminFRConfig"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="urn:LonminFRConfig lonminFRConfigSchema.xsd">

</l:config>

The namespaces are really giving me a hard time!

Answer 1

Try this:

XmlDocument xmlDoc = new XmlDocument();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlDoc.NameTable);
nsmgr.AddNamespace("l", "urn:LonminFRConfig");
nsmgr.AddNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");

XmlElement config = xmlDoc.CreateElement("l:config", nsmgr.LookupNamespace("l"));
XmlAttribute schemaLocation = xmlDoc.CreateAttribute(
    "xsi:schemaLocation", nsmgr.LookupNamespace("xsi"));
config.Attributes.Append(schemaLocation);
schemaLocation.Value = "urn:LonminFRConfig lonminFRConfigSchema.xsd";

xmlDoc.AppendChild(config);
xmlDoc.Save(Console.Out);

Good luck!

Answer 2

Thi will do it.

const string lNS = "urn:lLominFRConfig";
const string xsiNS = "http://www.w3.org/2001/XMLSchema-instance";

var dom = new XmlDocument();

var configElem = dom.AppendChild(dom.CreateElement("l:config", lNS));

configElem.Attributes.Append(dom.CreateAttribute("xsi:schemaLocation", xsiNS))
    .Value = "urn:LonminFRConfig lonminFRConfigSchema.xsd";