private void btnWlasciwoscMaterialu_Click(object sender, EventArgs e)
{
this.Hide();
this.Close();
Wlasciwosc_materialu wlasciwoscMaterialu = new Wlasciwosc_materialu(this.database);
wlasciwoscMaterialu.ShowDialog();
}
private void btnSaveChanges_Click(object sender, EventArgs e)
{
Wlasciwosc_materialu frm = (Wlasciwosc_materialu)Application.OpenForms["Wlasciwosc_materialu"];
int row = Convert.ToInt32(frm.dgvWlasciwoscMaterialu.CurrentRow.Cells[0].Value);;
DM_Wlasciwosc_materialu toUpdate = this.database.DM_Wlasciwosc_materialu.Where(id_materialu => id_materialu.id_wlasciwosc_materialu == row).First();
toUpdate.Id_materialu = Convert.ToInt32(cmbMaterial.SelectedValue);
toUpdate.Id_wlasciwosc = Convert.ToInt32(cmbWlasciwosc.SelectedValue);
toUpdate.Wartosc = txtValue.Text;
this.database.SaveChanges();
var WlasciwoscMaterialuForm = Application.OpenForms.OfType <Wlasciwosc_materialu>().Single();
WlasciwoscMaterialuForm.initDataGridView();
this.Close();
}