getting part of xml from xml document via c#

Question

i have an xml the structure is complex

<da:main xmlns:da="namespace1">
<da:siteinfo>*</da:siteinfo>
<da:Header></da:Header>
<da:Body>
<ap:header xmlns:ap="namespace2"></ap:header>
<d:Details xmlns:d="namespace3"></d:Details>

</da:Body>
</da:main>

how can i get Details session as a separate xml with namespace and prefix?

Answer 1

in xml docs, the namespace name is fixed, but the prefix can vary by document. something like:

XmlNode? GetDetails(XmlDocument doc)
{
    var nsmgr = new XmlNamespaceManager(doc.NameTable);
    nsmgr.AddNamespace("n1", "namespace1");
    nsmgr.AddNamespace("n2", "namespace2");
    nsmgr.AddNamespace("n3", "namespace3");

    var xPathString = "//n1:main/n1:Body/n3:Details";
    var xmlNode = doc.DocumentElement!.SelectSingleNode(xPathString, nsmgr);
    return xmlNode;
}

Answer 2

In BizTalk would create a schema that has that desired structure and namespace, and then map from the original schema to the new schema.

Namespace prefixes don't have to be unique except within the same payload, and you can't control that easily in BizTalk, and you shouldn't have to.

Answer 3

Hi @LALITHAKAKARAPALLI-1754,

Here is a most efficient method by using LINQ to XML API.
It is available in the .Net Framework since 2007.

c#

void Main()
{
    XDocument xdoc = XDocument.Parse(@"<da:main xmlns:da='namespace1'>
        <da:siteinfo>*</da:siteinfo>
        <da:Header></da:Header>
        <da:Body>
            <ap:header xmlns:ap='namespace2'></ap:header>
            <d:Details xmlns:d='namespace3'>
                <d:child1></d:child1>
                <d:child2></d:child2>
            </d:Details>
        </da:Body>
    </da:main>");

    XNamespace ns = "namespace3";
    var xmlNode = xdoc.Descendants(ns + "Details");

    Console.Write(xmlNode);
}

Output

<d:Details xmlns:d="namespace3">
  <d:child1></d:child1>
  <d:child2></d:child2>
</d:Details>