private void comboBoxSemester_SelectionChangeCommitted(object sender, EventArgs e)
        {
            comboBoxSection.DataSource = null;
            comboBoxSection.Items.Clear();
            comboBoxSubject.DataSource = null;
            comboBoxSubject.Items.Clear();

            Controller.Section section = new Controller.Section();
            Controller.Subject subject = new Controller.Subject();
            section.LoadAllSection(userAccount.ua_department_id, Convert.ToInt32(comboBoxSemester.SelectedValue), comboBoxSection);
            subject.LoadAllSubject(userAccount.ua_department_id, Convert.ToInt32(comboBoxSemester.SelectedValue), comboBoxSubject);
        }
        public Controller.UserAccount userAccount; //For user identification

        public ViewSectionForm(Controller.UserAccount ua)
        {
            InitializeComponent();
            section     = new Controller.Section();
            userAccount = ua;
        }