private void addToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (!edit)
            {
                return;
            }
            var edt = new PrintersEdit();

            edt.ShowDialog();
            printingMachinesTableAdapter.Fill(printingDataSet.PrintingMachines);
            printingDataSet.AcceptChanges();
        }
        private void editToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            if (!edit)
            {
                return;
            }
            var st = new PrintingDataSet.PrintingMachinesDataTable();

            printingMachinesTableAdapter.FillBy(st,
                                                Convert.ToInt32(dataGridViewPrinters.SelectedRows[0].Cells[0].Value));
            object[] row = st.Rows[0].ItemArray;
            var      edt = new PrintersEdit(
                Convert.ToInt32(row[0]),
                row[1].ToString(),
                Convert.ToInt32(row[2]),
                Convert.ToBoolean(row[3])
                );

            edt.ShowDialog();
            printingMachinesTableAdapter.Fill(printingDataSet.PrintingMachines);
            printingDataSet.AcceptChanges();
        }