XML ASP.Net

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Grades" %>



    Grades


    
    

        
        
        
    
    

    


File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Security.Principal;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Grades : System.Web.UI.Page
{
    protected void btnViewGrades_Click(object sender, EventArgs e)
    {
        Response.Write(WindowsIdentity.GetCurrent().Name + "
");
        WindowsImpersonationContext ctx = ((WindowsIdentity)User.Identity).Impersonate();
        Response.Write(WindowsIdentity.GetCurrent().Name + "
");
        try
        {
            DataSet ds = new DataSet();
            ds.ReadXml(Server.MapPath("Data.xml"));
            GridView1.DataSource = ds.Tables[0];
            GridView1.DataBind();
        }
        catch (UnauthorizedAccessException)
        {
            lblResult.Text = "Not Authorized!";
        }
        ctx.Undo();
        Response.Write(WindowsIdentity.GetCurrent().Name + "
");
    }
}
File: Data.xml


  
    John Smith
    B
  

  
    Jane Doe
    A