How to add XmlElement with a namespace

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Krzysztof Kazmierczak - 29 Aug 2005 21:45 GMT

Hi All!

I have problem with creating xml document with a namespace:

XmlDocument xmlDocument = new XmlDocument();

XmlElement rootElement = xmlDocument.CreateElement("foo");
xmlDocument.AppendChild(rootElement);

XmlElement boo = xmlDocument.CreateElement("boo");
boo.InnerText = "boo";
rootElement.AppendChild(boo);

XmlElement coo = xmlDocument.CreateElement("coo");
coo.InnerXml = "<doo>test</doo>";
rootElement.AppendChild(coo);

I would like to have:
coo.InnerXml = "<xsl:doo>test</xsl:doo>";
instead of
coo.InnerXml = "<doo>test</doo>";

but I receive an error message:

'xsl' is undeclared namespace

I tried to add something like that:

XmlAttribute namespaceAttribute = xmlDocument.CreateAttribute("xmlns",
"xsl", "http://www.w3.org/2000/xmlns/");
namespaceAttribute.InnerText = "http://www.w3.org/1999/XSL/Transform";
rootElement.Attributes.Append(namespaceAttribute);

or

XmlAttribute namespaceAttribute = xmlDocument.CreateAttribute("xmlns",
"xsl", "http://www.w3.org/2000/xmlns/");
namespaceAttribute.Value = "http://www.w3.org/1999/XSL/Transform";
xmlDocument.DocumentElement.SetAttributeNode(namespaceAttribute);

but without effects, stil got error message. Is that possible to create
XmlDocument in memory with a namespace?

Thank you very much for any help
Kind regards
Krzysztof Kazmierczak

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Yingzi Le - 29 Aug 2005 23:43 GMT

Hi Krzysztof,

The root element should have namespace declared. The following code works:

        XmlDocument xmlDocument = new XmlDocument();

        XmlDocument xmlDoc = new XmlDocument();
        string rootElement = "<foo xmlns:xsl='urn:test'/>";

        xmlDoc.Load(new StringReader(rootElement));

        XmlElement boo = xmlDoc.CreateElement("boo");
        boo.InnerText = "boo";
        xmlDoc.DocumentElement.AppendChild(boo);

        XmlElement coo = xmlDoc.CreateElement("coo");
        XmlElement doo = xmlDoc.CreateElement("xsl","doo","urn:test");
        doo.InnerText = "test";
        coo.AppendChild(doo);
        xmlDoc.DocumentElement.AppendChild(coo);
        xmlDoc.Save(Console.Out);

Thanks,
-- Yingzi Le

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--------------------

>Thread-Topic: How to add XmlElement with a namespace
>thread-index: AcWs2qgEgMfEc9vSSKambaDeZcbAZw==
[quoted text clipped - 65 lines]
>Kind regards
>Krzysztof Kazmierczak

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Krzysztof Kazmierczak - 30 Aug 2005 10:43 GMT

Hi!

Thank you very much for your help! The code works great, but I still need to
do that thing:

instead of:
XmlElement coo = xmlDoc.CreateElement("coo");
XmlElement doo = xmlDoc.CreateElement("xsl","doo","urn:test");

I need:
XmlElement coo = xmlDoc.CreateElement("coo");
coo.InnerXml = "<xsl:doo>test</xsl:doo>";

And I receive the same error message saying that xsl is undeclared namespace

Is that possible to add coo content that way?

Best regards and thank you very much for help
Krzysztof

> Hi Krzysztof,
>
[quoted text clipped - 95 lines]
> >Kind regards
> >Krzysztof Kazmierczak

Reply to this Message

Martin Honnen - 30 Aug 2005 12:55 GMT

> I would like to have:
> coo.InnerXml = "<xsl:doo>test</xsl:doo>";
[quoted text clipped - 4 lines]
>
> 'xsl' is undeclared namespace

It obviously is so decide which namespace URI you want to use (for
instance http://example.com/2005/08/ns1) and then try (example C# code)
coo.InnerXml =
"<xsl:doo xmlns:xsl=\"http://example.com/2005/08/ns1\">test</xsl:doo>";

> Is that possible to create
> XmlDocument in memory with a namespace?

Yes, sure, when you create an element you can directly create it in the
desired namespace by using an overload of CreateElement that takes three
arguments, the prefix, the local element name, and the namespace URI e.g.
XmlElement element =
someXmlDocument.CreateElement(
"prefix",
"localName",
"http://example.com/2005/08/ns1"
);
will create
<prefix:localName xmlns:prefix="http://example.com/2005/08/ns1" />

Signature

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

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How to add XmlElement with a namespace

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