How Can I Effectively Parse XML with Namespaces Using LINQ to XML?

Use LINQ to XML to parse XML containing namespace declarations

Parsing XML containing namespace declarations can be challenging using LINQ to XML.

Consider the following XML code:

<code class="language-xml"><Response xmlns="http://myvalue.com"><Result xmlns:a="http://schemas.datacontract.org/2004/07/My.Namespace" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><a:TheBool>true</a:TheBool><a:TheId>1</a:TheId></Result></Response></code>

To parse this XML we can use the following code:

<code class="language-csharp">XDocument xmlElements = XDocument.Parse(theXml);

XNamespace ns = "http://myvalue.com";
XNamespace nsa = "http://schemas.datacontract.org/2004/07/My.Namespace";
var elements = from data in xmlElements.Descendants(ns + "Result")
              select new
              {
                  TheBool = (bool)data.Element(nsa + "TheBool"),
                  TheId = (int)data.Element(nsa + "TheId"),
              };</code>

Note the use of Descendants within ns and Elements within nsa. These namespaces enable LINQ to XML methods to identify the correct elements.

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