private void BtnUsun_Click(object sender, RoutedEventArgs e)
        {
            var Res = MessageBox.Show("Usunąć ?", "Usuwanie pozycji", MessageBoxButton.YesNo, MessageBoxImage.Exclamation);

            if (Res == MessageBoxResult.Yes)
            {
                PanelTrace_db.UsunTraceMaterial(rowTraceMaterial);
                listTraceMaterial    = PanelTrace_db.PobierzTraceMaterial();
                grdLista.ItemsSource = listTraceMaterial;
            }
        }
        private void BtnAnuluj_Click(object sender, RoutedEventArgs e)
        {
            grdBookmark            = grdLista.SelectedIndex;
            grdLista.IsEnabled     = true;
            grdPozycje.IsEnabled   = false;
            btnDodaj.IsEnabled     = true;
            btnKlonuj.IsEnabled    = true;
            btnPopraw.IsEnabled    = true;
            btnUsun.IsEnabled      = true;
            btnAnuluj.IsEnabled    = false;
            btnZatwierdz.IsEnabled = false;
            listTraceMaterial      = PanelTrace_db.PobierzTraceMaterial();
            grdLista.ItemsSource   = listTraceMaterial;

            grdLista.SelectedIndex = grdBookmark;
        }
        private void BtnZatwierdz_Click(object sender, RoutedEventArgs e)
        {
            grdLista.IsEnabled     = true;
            grdPozycje.IsEnabled   = false;
            btnDodaj.IsEnabled     = true;
            btnKlonuj.IsEnabled    = true;
            btnPopraw.IsEnabled    = true;
            btnUsun.IsEnabled      = true;
            btnAnuluj.IsEnabled    = false;
            btnZatwierdz.IsEnabled = false;

            switch (akcja)
            {
            case "D":
            case "K":
                if (grdPozycje.DataContext is trace_material)
                {
                    var row = new trace_material();
                    row       = grdPozycje.DataContext as trace_material;
                    row.id    = PanelTrace_db.IdTraceMaterial();
                    row.opw   = frmLogin.LoggedUser.login;
                    row.czasw = DateTime.Now;
                    row.opm   = frmLogin.LoggedUser.login;
                    row.czasm = DateTime.Now;
                    PanelTrace_db.DodajTraceMaterial(row);
                }
                break;

            case "P":
                rowTraceMaterial.opm   = frmLogin.LoggedUser.login;
                rowTraceMaterial.czasm = DateTime.Now;
                PanelTrace_db.PoprawTraceMaterial(rowTraceMaterial);
                break;

            default:
                break;
            }
            listTraceMaterial    = PanelTrace_db.PobierzTraceMaterial();
            grdLista.ItemsSource = listTraceMaterial;
        }