Linq to XML Disable default namespace

Question

I'm trying to use LINQ to XML to write queries for a WebDAV server but I'm having a problem where LINQ is setting a default namespace (xmlns = "bla") which doesn't seem to be supported by WebDAV.

XNamespace ns = "d";
var content = new XElement(ns + "propfind"
,new XAttribute(XNamespace.Xmlns + "d", "DAV:")
,new XElement(ns + "allprops"));

The expected output is:

<d:propfind xmlns:d="DAV:"><d:allprop /></d:propfind>

But no matter how I attempt to serialize (even with XElement.Save(someStream, SaveOptions.DisableFormatting)) I always get this which is not supported by the WebDav server I'm trying to hit.

<propfind xmlns:d="DAV:" xmlns="d"><allprop /></propfind>

Jon Skeet · Accepted Answer · 2015-01-06 18:59:52Z

3

The problem is that your element isn't in the DAV: namespace - it's in the d namespace. You need to differentiate between the namespace URI and the namespace alias. You want:

XNamespace ns = "DAV:";
var content = new XElement(ns + "propfind",
    new XAttribute(XNamespace.Xmlns + "d", ns),
    new XElement(ns + "allprops"));

answered Jan 6, 2015 at 18:59

Jon Skeet

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3 Comments

NtscCobalt Over a year ago

Ahh ok thank you. So if I'm understanding correctly I'm still using the namespace 'DAV' in all my definitions and the serialization will understand that it should use the alias I'm providing as 'd'

Jon Skeet Over a year ago

@NtscCobalt: Yes - although it will also be the default for the element and descendants, so unless you want the alias, just remove the attribute entirely...

NtscCobalt Over a year ago

Ok makes sense. Yes in this case I need the alias. IIS gives me a 400 if DAV is set as the default namespace on the root element.

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