displaying all records

Query = "select * from register ";

                SqlCommand cmd = new SqlCommand(Query, con);

                SqlDataReader dr = cmd.ExecuteReader();

                if (dr.HasRows)

                {

                    while (dr.Read())

                    {

                        lblid.Text = dr["mcode"].ToString() + " - " + dr["fullname"].ToString();

}}

i hve the above code

only the first record gets displayed . all the records needs to be displayed