private void DeleteSubject(object sender, ExecutedRoutedEventArgs e)
{
Subject selectedSubject = SubjectList.SelectedItem as Subject;
if (selectedSubject == null)
{
return;
}
var result =
MessageBox.Show(
"Are you sure you want delete subject \"" + selectedSubject.Name +
"\" ?\n All related tasks and TimeTable items will be deleted.", "Confirm", MessageBoxButton.YesNo);
if (result == MessageBoxResult.No)
{
return;
}
_subjectRepository.DeleteSubjectById(selectedSubject.SubjectId);
_displayedSubjects.Remove(selectedSubject);
SubjectList.Items.Refresh();
AwailableSubjects.Items.Refresh();
InitTaskGrid(false);
InitSubjectControl();
}