C # XML operations: write an XML record (1)

Chapter 2: Add records to existing XML files
You can add nodes and attributes according to the XML structure.
In the test, we assume that the original XML file is as follows:
<? Xml version = "1.0" encoding = "gb2312"?>
<Users>
<User id = "1">
<UserName> outrace </userName>
<UserPass> mypass </userPass>
</User>
<User id = "2">
<UserName> trace </userName>
<UserPass> mypass </userPass>
</User>
</Users>

Write the following code <% @ Import Namespace = "System. IO" %>
<% @ Import Namespace = "System. Xml" %>
<Script Language = "C #" Debug = "true" Runat = "Server">
Public void Page_Load (Object src, EventArgs e)
{
/*
* Copyright: copyright by SEM IT DEPARTMENT
* Version: version 0.0.1
* File: InsertXml_1.aspx
* Usage: add records to XML
* Author: Ouyang Yuntian @ 2005-4-7
* Mail: outrace@soueast-motor.com
* Modification:
*/
String fileName;
FileName = "users_1.xml ";
Try
{
// Create an xml dom first
XmlDocument doc = new XmlDocument ();
// Read the XML file
Doc. Load (Server. MapPath ("./files/") + fileName );
// Create a node.
XmlElement newUser = doc. CreateElement ("user ");
// Create an attribute and place the secondary attribute under the contact "newUser"
XmlAttribute newID = doc. CreateAttribute ("id ");
NewID. InnerText = "3 ";
NewUser. SetAttributeNode (newID );
// Create a node and use it as a subnode of "newUser"
XmlElement newUserName = doc. CreateElement ("userName ");