kopiere xml fra et dokument over i et andet

Jeg troede at XPathDocument var readonly ?

Et tigtigt XmLDocument har en ImportNode metode.

XPathNavigator nav;
XPathDocument doc;

XPathNodeIterator nodeName;
XPathNodeIterator nodePrice;

string nodename;
string nodeprice;

doc = new XPathDocument(//stien til filen);
nav = doc.CreateNavigator();

nodename = "//book/name";
nodeprice = "//book/price";

hvis din xml fil fx. ser således ud
<?xml version="1.0" encoding="utf-8" ?>
<book>
  <name>Oliver</name>
  <price>20</price>
</book>

nodeName = nav.Select(nodename);
nodePrice = nav.Select(nodeprice);

string newfile="C:\\NewFile.xml";
XmlTextWriter tw = new XmlTextWriter(newfile, null);

tw.Formatting = Formatting.Indented;
tw.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");

nodename = nodeName.Current.Value.ToString();
nodeprice = nodePrice.Current.Value.ToString();

tw.WriteStartElement("book");
tw.WriteElementString("name", nodename);
tw.WriteElementString("price", nodeprice");
tw.WriteEndElement();