复制节点并更改属性的值

Question

I have the following XML File. I want to copy a new "Test" and change the ID of the Test. How is it possible?

I already can copy the nodes, unfortunately not on the correct position (see images) and I also can´t change the ID. Anyone have a solution for me?

Before:

After:

XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(Before.xml");

XmlNode Set = xmldoc.DocumentElement;
string strXmlQuery = "/Toolings/Testing/Test1";

XmlNode NodeToCopy = Set.SelectSingleNode(strXmlQuery);
XmlNode NewNode = NodeToCopy.CloneNode(true);

NodeToCopy.AppendChild(NewNode);

Set.InsertAfter(NewNode, Set.LastChild);

XPathNavigator navigator = xmldoc.CreateNavigator();

navigator.MoveToRoot();
navigator.MoveToFirstChild();
navigator.MoveToFirstChild();
navigator.MoveToFirstChild();
navigator.MoveToFirstChild();
navigator.SetValue("5678");

xmldoc.Save(After.xml");

Answer 1

Here is an example using System.Xml.Linq.XDocument which is a much easier API than XmlDocument :

//You can also use Load(), this is just so I didn't have to make a file
XDocument doc = XDocument.Parse("<Toolings><Testing><Test><ID>1234</ID></Test></Testing></Toolings>");

//Grab the first Test node (change the predicate if you have other search criteria)
var elTest = doc.Descendants().First(d => d.Name == "Test");

//Copy the node, only necessary if you don't know the structure at design time
XElement el = new XElement(elTest);

el.Element("ID").Value = "5678";

//inject new node 
elTest.AddAfterSelf(el);

doc.Save("After.xml");