//the update method is called when the button edit course is clicked
//this method will cause a window apears where a existing course can be edited
private void CreateCourse_Click(object sender, RoutedEventArgs e)
{
var dlg = new CourseEditor(databaseController);
dlg.ShowDialog();
dlg.Close();
CoursesGrid.ItemsSource = databaseController.RetrieveAllDbCourses();
}
// Open course editor with selected course
private void Update_Click(object sender, EventArgs e)
{
if (CoursesGrid.SelectedIndex.Equals(-1))
{
return;
}
var dlg = new CourseEditor((Course)CoursesGrid.SelectedItem, databaseController);
dlg.ShowDialog();
dlg.Close();
CoursesGrid.ItemsSource = databaseController.RetrieveAllDbCourses();
}