private void locBtn2_Click(object sender, EventArgs e)
        {
            roomsConn roomsConn           = new roomsConn();
            roomModel roomsModel          = new roomModel();
            String    selectedSessionType = sessionType.Text.ToString();

            roomsModel.roomName    = assignRoom.Text;
            roomsModel.subjectCode = asubjectCode.Text;
            roomsModel.facultyNme  = faculty.Text;
            roomsConn.updateSessionTable(roomsModel, notavltime.Text.ToString(), selectedSessionType);
            roomManagingSource.DataSource = roomsConn.load_con_sesssion_details();
        }