private void OnSaveClickCommand() { try { if (!_modelTrain.IsBusy) { if (CheckInputData()) { IsLoading = true; ItemEdit.NamHoc = SelectedNamHoc.ID; ItemEdit.HocKy = SelectedHocKy.ID; ItemEdit.KhoaID = SelectedKhoa.KhoaID; ItemEdit.LopID = ItemLopHoc.LopID; ItemEdit.MonHocID = ItemMonHoc.MonHocID; _modelTrain.SaveTrainingAsync(ItemEdit); } } } catch (Exception ex) { MessageCustomize.Show(ex.Message); } }