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Asked: 2026-06-08T19:00:55+00:00

I have a following XML structure : <html xmlns =http://www.w3.org/1999/xhtml > <head> . .

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I have a following XML structure :

<html xmlns ="http://www.w3.org/1999/xhtml" >
 <head>
  . .
 </head>
 <body>
  <div id="1"></div>
  <div id="2"></div>
 </body>
</html>

I used linq to xml to access div with id = “2”. I loaded document in XDocument :

   XDocument  ndoc = XDcoument.load(path);
   XElement n = new XElement("name","value");
   XNamespace xn = "http://www.w3.org/1999/xhtml";

ndoc.Descendants(xn + "div").Single(p => p.Attribute("id").Value == "1").Add(n);

                             OR

ndoc.Descendants("div").Single(p => p.Attribute("id").Value == "1").Add(n);

I tried out both case in each case there was an exception sequence contain no element. Whats the problem here?

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1 Answer

  1. Editorial Team

    You can give this Xml Library a whirl and it should get it easily with:

    XElement root = XElement.Load(path);
XElement div = root.XPathElement("//div[@id={0}]", 1);
if(null != div) // which it shouldn't be
    div.Add(n);
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