private void lecturers_list_box_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.lecturers_list_box.SelectedItem != null)
{
List <Course> lC = new List <Course>();
courses_list_box.Visible = true;
courses_list_box.Items.Clear();
lC = SqlWorker.GetStudentCourses((StaffMemeber)lecturers_list_box.SelectedItem);
foreach (Course c in lC)
{
courses_list_box.Items.Add(c);
}
course_name.Text = "";
course_ID.Text = "";
course_Lecturer.Text = "";
course_type.Text = "";
have_pract.Text = "";
have_lab.Text = "";
}
else
{
courses_list_box.Items.Clear();
courses_list_box.Visible = false;
}
}