how can i retrieve infromation in new pagg(page_load event) ?

private void btnLogin_Click(object sender, EventArgs e)
        {
            

                
                counter = counter + 1;
                try
                {

                    //SqlConnection con = new SqlConnection();
                    //con.ConnectionString = "Data Source=######; Initial Catalog=$$$$$$; User ID=sa; Password=@@@@@@@@@";
                    //con.Open();

                    Program.Connection2Server();
                    
                    string query = "select * from Users_Password where UserName='" + cboUser.Text + "'";
                    SqlCommand cmd = new SqlCommand(query,Program.con);
                    SqlDataReader dr = cmd.ExecuteReader();

                    dr.Read();

                    string s1 = dr[0].ToString().Trim();
                    string s2 = dr[1].ToString().Trim();
                    if ((s1 == cboUser.Text) && (s2 == txtpassword.Text))
                    {
                        
                        MessageBox.Show("Login Succesfull");


                        if (cboUser.Text == "Admin")
                        {
                            Admin ad = new Admin();
                            this.Hide();
                            ad.Show();
                        }
                        else if (cboUser.Text == "Faculty")
                        {
                            Faculty fac = new Faculty();
                            this.Hide();
                            fac.Show();

                        }
                        else if (cboUser.Text == "Accounts")
                        {
                            Accounts acc = new Accounts();
                            this.Hide();
                            acc.Show();
                        }
                        else if (cboUser.Text == "Students")
                        {
                            Students st = new Students();
                            this.Hide();
                            st.Show();
                        }
                        Program.con.Close();
                    }
                    else
                    {
                        MessageBox.Show("Login Failed");
                        txtpassword.Clear();
                        txtpassword.Focus();
                    }

                    Program.con.Close();

                    
                }
                catch (SqlException se)
                {
                    MessageBox.Show("Error in Sql Connection" + se.ToString());
                }

            
            
            
        }