How can I write xml with a namespace and prefix with XElement?

Question

This may be a beginner xml question, but how can I generate an xml document that looks like the following?

<root xmlns:ci="http://somewhere.com" xmlns:ca="http://somewhereelse.com"&gt;
    <ci:field1>test</ci:field1>
    <ca:field2>another test</ca:field2>
</root>

If I can get this to be written, I can get the rest of my problem to work.

Ideally, I'd like to use LINQ to XML (XElement, XNamespace, etc.) with c#, but if this can be accomplished easier/better with XmlDocuments and XmlElements, I'd go with that.

Thanks!!!

Answer 1

I hope you will get some useful information from this thread - http://stackoverflow.com/questions/1231396/xelement-default-namespace-on-attributes-provides-unexpected-behaviour

EDIT:

Another FAQ at - http://social.msdn.microsoft.com/Forums/en-US/xmlandnetfx/thread/c0648840-e389-49be-a3d2-4d5db17b8ddd

Answer 2

Here is a small example that creates the output you want:

using System;
using System.Xml.Linq;

class Program
{
    static void Main()
    {
     XNamespace ci = "http://somewhere.com";
     XNamespace ca = "http://somewhereelse.com";

     XElement element = new XElement("root",
      new XAttribute(XNamespace.Xmlns + "ci", ci),
      new XAttribute(XNamespace.Xmlns + "ca", ca),
       new XElement(ci + "field1", "test"),
       new XElement(ca + "field2", "another test"));
    }
}

Answer 3

XNamespace ci = "http://somewhere.com";
XNamespace ca = "http://somewhereelse.com";
XElement root = new XElement(aw + "root",
    new XAttribute(XNamespace.Xmlns + "ci", "http://somewhere.com"),
    new XAttribute(XNamespace.Xmlns + "ca", "http://somewhereelse.com"),
    new XElement(ci + "field1", "test"),
    new XElement(ca + "field2", "another test")
);
Console.WriteLine(root);

This should output

<root xmlns:ci="http://somewhere.com" xmlns:ca="http://somewhereelse.com"&gt;
    <ci:field1>test</ci:field1>
    <ca:field2>another test</ca:field2>
</root>