private void UnitCourseForm_Load(object sender, EventArgs e)
        {
            clsUnitCourse objUnitCourse = new clsUnitCourse();

            ComboBox[] cmb = new ComboBox[] { cmbUnitID, cmbUnitName, cmbCourseID, cmbCourseName };
            objUnitCourse.Load(cmb);
            objUnitCourse.ViewAll(dgvUnitCourse);
        }
        private void mnuDelete_Click(object sender, EventArgs e)
        {
            if (!clsValidation.ValidateComboBox(cmbUnitID))
            {
                return;
            }
            if (!clsValidation.ValidateComboBox(cmbCourseID))
            {
                return;
            }
            clsUnitCourse objUnitCourse = new clsUnitCourse(Convert.ToInt32(cmbUnitID.Text), Convert.ToInt32(cmbCourseID.Text));

            objUnitCourse.Delete();
            MessageBox.Show("Unit-Course record successfully deleted!");
            objUnitCourse.ViewAll(dgvUnitCourse);
        }
        private void mnuViewAll_Click(object sender, EventArgs e)
        {
            clsUnitCourse objUnitCourse = new clsUnitCourse();

            objUnitCourse.ViewAll(dgvUnitCourse);
        }