public SubjectWindow(DeaneryLibrary.GroupItem group)
 {
     InitializeComponent();
     Subjects = new SubjectRepository().GetSubjectsByGroupId(group.Id);
     _group_id = group.Id;
     DataContext = this;
 }
 public StudentByGroupWindow(DeaneryLibrary.GenericItem group)
 {
     InitializeComponent();
     Students = _repo.GetStudentByGroupId(group.Id);
     DataContext = this;
     Group = group;
 }
 public GroupEditWindow(DeaneryLibrary.GroupItem item)
 {
     InitializeComponent();
     Group = item;
     Specialites = new SpecialityRepository().GetAll();
     SelectedSpeciality = Specialites[0];
     //SelectedSpeciality = new SpecialityItem(item.SpecialityId, item.SpecialityName);
     DataContext = this;
 }