//单击客房在不可读区显示客房信息
        private void dgvRoomInfoList_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            index = dgvRoomInfoList.SelectedCells[0].RowIndex;
            List<Room> rooms = dgvRoomInfoList.DataSource as List<Room>;
            Room room=rooms[index];
            manager.SearchRoom(room);
            //赋值
            txtNumber_2.Text = room.Number;
            txtGuestNumber_2.Text = room.GuestNumber.ToString();
            txtBedNumber_2.Text = room.BedNumber.ToString();
            cboState_2.Text=room.State;//此处
            txtDescription_2.Text = room.Description;
        }