private void Delete_Click(object sender, RoutedEventArgs e)
{
if (listBox1.SelectedItem != null)
{
long id = (listBox1.SelectedItem as Lesson).ID;
lessons.Remove((Lesson)listBox1.SelectedItem);
_contentManager.DeleteLesson(id, loadedComponent.ID);
listBox1.Items.Refresh();
Confirm.IsEnabled = true;
savedLessons = false;
numOfLessons--;
if (listBox1.Items.Count == 0)
{
empty = true;
}
else
{
empty = false;
}
Edit.IsEnabled = false;
Delete.IsEnabled = false;
}
}
