private void Edit_Button_Click(object sender, RoutedEventArgs e)
{
if (courseNumberTB.Text == "" || courseNumberTB.Text == "" ||
courseMeetingTimeTB.Text == "" || datepicker.SelectedDate == null)
{
MessageBox.Show("Please enter all information.");
}
else
{
FileReadWrite file = new FileReadWrite();
Course EditCourse = new Course(Convert.ToInt32(courseNumberTB.Text),
courseNameTb.Text, courseMeetingTimeTB.Text, (DateTime)datepicker.SelectedDate);
student.CourseList[index] = EditCourse;
file.EditCourseToFile(student, oldCourse, EditCourse);
ViewCourses vc = new ViewCourses(student);
this.Close();
vc.Show();
}
}