C # XML operations: write an XML record (2)

C # preliminary XML operations (5)
Chapter 2: Add records to existing XML files
In addition, C # provides a more convenient way for us to operate XML, that is, DATASET
In fact, we can think that DATASET is actually multiple XML files. Using DATASET's built-in methods and attributes to operate XML is very flexible.
Let's continue to assume that an existing 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" %>
<% @ Import Namespace = "System. Data" %>
<Script Language = "C #" Runat = "Server" Debug = "true">
Public void Page_Load (Object src, EventArgs e)
{
/*
* Copyright: copyright by SEM IT DEPARTMENT
* Version: version 0.0.1
* File: InsertXml_2.aspx
* Usage: add data to XML using DATASET
* Author: Ouyang Yuntian @ 2005-4-9
* Mail: outrace@soueast-motor.com
* Modification:
*/
String fileName;
FileName = "users_2.xml ";
DataSet myDs = new DataSet ();

Try
{
FileStream fin;
Fin = new FileStream (Server. MapPath ("./files/" + fileName), FileMode. Open, FileAccess. Read, FileShare. ReadWrite );
MyDs. ReadXml (fin );
Fin. Close ();
}
Catch (Exception ex)
{
Response. Write (ex. Message );