用do while实现多个结果集的查询

protected void Button1_Click(object sender, EventArgs e)
        {
            string constr = @"Data source=PC-20121107KEFI\MSAS;initial catalog=zhucedenglu; user id=sa; password=12345";
            using (SqlConnection conn = new SqlConnection(constr)) {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand()) {
                    cmd.CommandText = "select * from T_zhmm;select * from T_denglu";
                    using (SqlDataReader reader = cmd.ExecuteReader()) {
                        do
                        {
                            while (reader.Read())
                            {  
                                TableRow tr = new TableRow();TableCell tc;
                                for (int i = 0;i<reader.FieldCount; i++)
                                {
                                    tc = new TableCell();
                                    tc.Text = reader.GetValue(i).ToString();
                                    tr.Cells.Add(tc);
                                }
                                Table1.Rows.Add(tr);
                            }
                        }
                        while (reader.NextResult());
                    }
                }
            }
        }