C#

<br />
private void Insert2XML(string strXmlFilePath, string PersonName, int ID, string Notes)<br />
{<br />
XmlDocument doc = new XmlDocument();<br />
doc.Load(strXmlFilePath);<br />
XmlNode root = doc.DocumentElement;<br />
<br />
XmlNode Person = doc.CreateElement("Person");<br />
Person.SetAttribute("Name", PersonName);<br />
Person.SetAttribute("ID", ID.ToString());<br />
Person.InnerText = Notes;<br />
root.AppendChild(Person);<br />
<br />
// Save the document to a file and auto-indent the output.<br />
XmlTextWriter writer = new XmlTextWriter(strXmlFilePath, null);<br />
writer.Formatting = Formatting.Indented;<br />
writer.Indentation = 4;<br />
doc.Save(writer);<br />
writer.Close();<br />
}<br />
<br />
private string GetPersonID(string strXmlFilePath, string PersonName)<br />
{<br />
XmlDocument doc = new XmlDocument();<br />
doc.Load(strXmlFilePath);<br />
XmlNode root = doc.DocumentElement;<br />
<br />
XmlNode SearchNode = root.SelectSingleNode("//*[@Name='" + PersonName + "']");<br />
if (SearchNode != null)<br />
{<br />
return SearchNode.Attributes["ID"].Value;<br />
}<br />
else<br />
{return "Not Found!"}<br />
}<br />

<br />
foreach(Node root in treeView.Nodes)<br />
{<br />
     CheckID(root);<br />
}<br />
<br />
private void CheckID(TreeNode root)<br />
{<br />
   Console.WriteLine((Person)root.Tag).ID);<br />
   foreach(Node element in root.Nodes)<br />
   {<br />
       CheckID(element);<br />
   }<br />
}<br />