如何从xml字符串C＃中提取节点

Question

I have am xml string like mentioned below:

<?xml version="1.0" encoding="utf-8" ?>
<NodeA xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.air-watch.com/webapi/resources">
    <AdditionalInfo>
        <Links>
            <Link xsi:type="link">
            </Link>
        </Links>
    </AdditionalInfo>
    <TotalResults>100</TotalResults>
    <NodeB>
        <NodeC>
            <Id>1</Id>
            <A>valueA</A>
            <B>valueB</B>
        </NodeC>
        <NodeC>
            <Id>2</Id>
            <A>valueA</A>
            <B>valueA</B>
        </NodeC>
   </NodeB>
</NodeA>

I want to extract NodeB and its child nodes (NodeC elements). How can I do it? Below solution does somewhat similar operation but it needs the xml string to be loaded in a XDocument first:

XDocument doc=XDocument.Parse(xmlstr);
String response=doc.Elements("question")
                   .Where(x=>x.Attribute("id")==id)
                   .Single()
                   .Element("response")
                   .Value;

Is there a way to do it without having to load it in a doc? Some operation on string object itself.

Answer 1

Why cant you use this

XDocument doc=XDocument.Parse(xmlstr);
String response=doc.Elements("question")
                   .Where(x=>x.Attribute("id")==id)
                   .Single()
                   .Element("response")
                   .Value; ?

you can use Regular Expressions then.