XML: let child-node inherit parent-node namespace?

Question

I'm trying to create some xml nodes runtime using XPath for C#. See XML Below:

<Package xmlns:m2="http://schemas.microsoft.com/appx/2013/manifest" xmlns="http://schemas.microsoft.com/appx/2010/manifest">
  <Application>
    <m2:VisualElements>
       <!--- INSERT CHILD NODES HERE WHICH ALSO HAVE NAMESPACE 'm2' ---->
    </m2:VisualElements>
  </Application>
</Package>

Currently I'm doing the following:

XElement visualElements = doc.Descendants().SingleOrDefault(p => p.Name.LocalName == "VisualElements");
visualElements.Add(new XElement(doc.Root.GetDefaultNamespace() + "InitialRotationPreference"));

I know that this is wrong since I reference the default namespace, this will result in this being added:

<InitialRotationPreference />

When I want:

<m2:InitialRotationPreference />

Is there some way to access the parent-nodes namespace (m2) without "knowing" the prefix or the namespace-url?

Thank you!

Charles Mager · Accepted Answer · 2015-05-29 15:32:36Z

1

Your document root's namespace is http://schemas.microsoft.com/appx/2010/manifest. Use the one from VisualElements:

XName name = visualElements.Name.Namespace + "InitialRotationPreference"

Or specify explicitly:

XName name = XName.Get("InitialRotationPreference", 
    "http://schemas.microsoft.com/appx/2013/manifest");

Then add an element with that name:

visualElements.Add(new XElement(name));

answered May 29, 2015 at 15:32

Charles Mager

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2 Comments

Whyser Over a year ago

Exactly what I was looking for (Name.Namespace)! The other solution you mentioned however, I explicitly said I didn't want. :) Thanks for quick answer, will accept answer in 5 min!

Charles Mager Over a year ago

@user2422321 oops, missed that bit! It's an option, anyway!

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