Authneticating a User using SQL Database.

private void Page_Load(object sender, System.EventArgs e)
               {

                 SqlConnection con;
             int abc= 0;
            con = new SqlConnection("server=user-182;user id=sa;password=007;database=srikanthch");
            con.Open();
            SqlCommand cmd;
            SqlDataReader rdr;
            cmd = new SqlCommand("select name,id from Srikanth",con);
            rdr=cmd.ExecuteReader();
            while (rdr.Read())
            {
                if (rdr["name"].ToString() == textBox1.Text && rdr["id"].ToString() == textBox2.Text)
                {
                    Response.write("valid");
                    abc = 1;
                }
            }
                if (abc == 0)
                {
                  Response.write("invalid");

                  }			

}