This small snippet shows how to use a XPath on a DataSet.

Here are the used classes:

DataRowDataSetXmlDataDocumentXmlNodeListXmlNode

Here’s the XML file:

Finally, here’s the code:

DataSet ds = new DataSet();ds.ReadXml(Server.MapPath("file.xml"));XmlDataDocument xmlDoc = new XmlDataDocument(ds);       XmlNodeList nodeList = xmlDoc.DocumentElement.SelectNodes("/CategoryList/Category[@ID=01]");   DataRow myRow;foreach (XmlNode myNode in nodeList){   myRow = xmlDoc.GetRowFromElement((XmlElement)myNode);   if (myRow != null)      Response.Write(myRow[0]);}

And the output?

One