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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Grades" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Grades</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="btnViewGrades" runat="server" OnClick="btnViewGrades_Click" Text="View Grades" /><br />
<asp:GridView ID="GridView1" runat="server"/>
<asp:Label ID="lblResult" runat="server"></asp:Label>
</div>
</form>
</body>
</html>
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 + "<br>");
WindowsImpersonationContext ctx = ((WindowsIdentity)User.Identity).Impersonate();
Response.Write(WindowsIdentity.GetCurrent().Name + "<br>");
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 + "<br>");
}
}
File: Data.xml
<?xml version="1.0" encoding="utf-8" ?>
<students>
<student>
<name>John Smith</name>
<grade>B</grade>
</student>
<student>
<name>Jane Doe</name>
<grade>A</grade>
</student>
</students>
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