Role based authentication

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.SqlClient;

using System.Web.Security;

using System.Data;

using System.Configuration;

namespace loginrolebased

{

public partial class Login : System.Web.UI.Page

{

string CS = ConfigurationManager.ConnectionStrings["EMS"].ConnectionString;

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btnLogin_Click(object sender, EventArgs e)

{

FormsAuthentication.Initialize();

// Create our connection and command objects

SqlConnection conn =

new SqlConnection(CS);

SqlCommand cmd = conn.CreateCommand();

cmd.CommandText = "SELECT roles FROM user1 WHERE uname=@uname " +

"AND pwd=@pwd";

// Fill our parameters

string EncryptedPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text, "SHA1");

// SqlParameter is in System.Data namespace

SqlParameter paramUsername = new SqlParameter("@Uname", txtUserName.Text);

SqlParameter paramPassword = new SqlParameter("@Pwd", EncryptedPassword);

cmd.Parameters.Add(paramUsername);

cmd.Parameters.Add(paramPassword);

//cmd.Parameters.Add("@uname", SqlDbType.NVarChar, 64).Value =txtUserName.Text;

//cmd.Parameters.Add("@pwd", SqlDbType.NVarChar, 128).Value =

// FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text, "sha1"); // Or "sha1"

//// Execute the command

conn.Open();

SqlDataReader reader = cmd.ExecuteReader();

if (reader.Read())

{

// Create a new ticket used for authentication

FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(

1, // Ticket version

paramUsername.ToString(), // Username associated with ticket

DateTime.Now, // Date/time issued

DateTime.Now.AddMinutes(30), // Date/time to expire

true, // "true" for a persistent user cookie

reader.GetString(0), // User-data, in this case the roles

FormsAuthentication.FormsCookiePath);// Path cookie valid for

// Encrypt the cookie using the machine key for secure transport

string hash = FormsAuthentication.Encrypt(ticket);

HttpCookie cookie = new HttpCookie(

FormsAuthentication.FormsCookieName, // Name of auth cookie

hash); // Hashed ticket

// Set the cookie's expiration time to the tickets expiration time

if (ticket.IsPersistent) cookie.Expires = ticket.Expiration;

// Add the cookie to the list for outgoing response

Response.Cookies.Add(cookie);

// Redirect to requested URL, or homepage if no previous page

// requested

string returnUrl = Request.QueryString["~/welcome.aspx"];

if (returnUrl == null) returnUrl = "/";

// Don't call FormsAuthentication.RedirectFromLoginPage since it

// could

// replace the authentication ticket (cookie) we just added

Response.Redirect(returnUrl);

}

else

{

// Never tell the user if just the username is password is incorrect.

// That just gives them a place to start, once they've found one or

// the other is correct!

lblmsg.Text = "Username / password incorrect. Please try again.";

lblmsg.Visible = true;

}

reader.Close();

conn.Close();

}

i am getting error in the red lines code

Plz check and solve it