object refernce nt set to an instance of object

[sunitakumari144]

its urgent please help me
error msg "object refernce nt set to an instance of object"

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;


public partial class Login1 : System.Web.UI.Page
    
{
    SqlConnection con;
    SqlCommand cmd;
    HttpCookie cookie, Counts;
    string user, pass, st;
 
  
   
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            // if (Convert.ToInt32(Request.Cookies["Counters"].Value)<1)
            if (Request.Cookies["Counters"] == null)
            {
                Counts = new HttpCookie("Counters");
                Counts.Value = "1";
                Counts.Expires = Convert.ToDateTime("05/06/2010");
                //Response.Write(Counts.Value.ToString());
                Response.Cookies.Add(Counts);
            }
        }
    }

    protected void btnLogin_Click1(object sender, EventArgs e)
    {
        try
        {
            con = new SqlConnection("Data Source=HOME-E83A512B4A;Initial Catalog=Banking;Integrated Security=SSPI");
            con.Open();
            Response.Write(con.State.ToString());
            cmd = new SqlCommand("Select CustomerID,AccountNo,LPin from tblCustomers where AccountNo='" + txtUser.Text + "' and LPin='" + txtPass.Text + "'", con);
            SqlDataReader dr;

            dr = cmd.ExecuteReader();
            if (dr.Read())
            {
                Session.Add("Customerid", dr.GetValue(0).ToString());
                Session.Add("AccountNo", dr.GetValue(1).ToString());

                user = dr.GetValue(1).ToString();
                pass = dr.GetValue(2).ToString();

                //  Response.Redirect("UserHome.aspx");
                dr.Close();
            }

            if (txtUser.Text == user && txtPass.Text == pass)
            {
                cookie = new HttpCookie("UN", txtUser.Text);
                cookie.Expires = Convert.ToDateTime("05/06/2010");
                Response.Cookies.Add(cookie);
                //Response.Write("Login Succeeded");
                // lblmsg.Text = "Login Succeded";
            }
            else
            {
                int Cnt = 0;
                Counts = new HttpCookie("Counters");
                Counts.Value = Convert.ToInt32(Request.Cookies["Counters"].Value + 1).ToString();
                Counts.Expires = Convert.ToDateTime("05/06/2010");

                // Counts.Value = Convert.ToInt32(Request.Cookies["Counters"].Value + 1).ToString();


                Response.Cookies.Add(Counts);
                //Request.Cookies["Counters"].Value = (Convert.ToInt32(Request.Cookies["Counters"].Value ) + 1).ToString();
                Response.Write(Request.Cookies["Counters"].Value);
                Cnt = Convert.ToInt32(Request.Cookies["Counters"].Value);
                if (Cnt >= 3)
                {
                    Response.Write("Your Account has been blocked");
                    // lblmsg.Text = "Your Account is Blocked";
                }
                // Response.Write(); 
            }
        }
        catch (Exception ex)
        {
            Response.Write("<script> alert('" + ex.Message.ToString() + "') </script>");
        }
      
    }
}

[finito]

Hello sunitakumari144 welcome to the forums, please start a new thread and please use Code tagging.

[kvprajapati]

Initialize string variables.

string user=string.Empty, pass=string.Empty, st=string.Empty;