//添加代码
           Panel1.Controls.Clear();
            for (int i = 0; i < Convert.ToInt32(DlPerson.SelectedValue); i++)
            {
                Panel1.Controls.Add(new TextBox() { Text="姓名"+i.ToString(), ID="lbl"+i.ToString() });
            }


          //遍历代码
           for (int i = 0; i < Panel1.Controls.Count; i++)
            {
                if (Panel1.Controls[i] is TextBox)
                {
                    TextBox tb = Panel1.Controls[i] as TextBox;
                    guestList.Add(new Guest() { Name = tb.Text, RoomNumber = i.ToString() });
                }
            }