How to remove xmlns attribute of a node other than root in an XDocument?
I think the code below is what you want. You need to put each element into the right namespace, and remove any xmlns=''
attributes for the affected elements. The latter part is required as otherwise LINQ to XML basically tries to leave you with an element of
<!-- This would be invalid -->
<Firstelement xmlns="" xmlns="http://my.namespace">
Here's the code:
using System;
using System.Xml.Linq;
class Test
{
static void Main()
{
XDocument doc = XDocument.Load("test.xml");
// All elements with an empty namespace...
foreach (var node in doc.Root.Descendants()
.Where(n => n.Name.NamespaceName == ""))
{
// Remove the xmlns='' attribute. Note the use of
// Attributes rather than Attribute, in case the
// attribute doesn't exist (which it might not if we'd
// created the document "manually" instead of loading
// it from a file.)
node.Attributes("xmlns").Remove();
// Inherit the parent namespace instead
node.Name = node.Parent.Name.Namespace + node.Name.LocalName;
}
Console.WriteLine(doc); // Or doc.Save(...)
}
}
There is no need to 'remove' the empty xmlns attribute. The whole reason that the empty xmlns attrib is added is because the namespace of your childnodes is empty (= '') and therefore differ from your root node. Adding the same namespace to your childs as well will solve this 'side-effect'.
XNamespace xmlns = XNamespace.Get("http://my.namespace");
// wrong
var doc = new XElement(xmlns + "Root", new XElement("Firstelement"));
// gives:
<Root xmlns="http://my.namespace">
<Firstelement xmlns="" />
</Root>
// right
var doc = new XElement(xmlns + "Root", new XElement(xmlns + "Firstelement"));
// gives:
<Root xmlns="http://my.namespace">
<Firstelement />
</Root>