private void issued_bt_Click(object sender, EventArgs e)
        {
            string    fio       = grid_readers.CurrentRow.Cells["f_name"].Value.ToString() + " " + grid_readers.CurrentRow.Cells["l_name"].Value.ToString() + " " + grid_readers.CurrentRow.Cells["surname"].Value.ToString();
            issued_fm issued_fm = new issued_fm(conn, grid_readers.CurrentRow.Cells["login"].Value.ToString(), fio);

            issued_fm.Show();
        }
 private void issued_bt_Click(object sender, EventArgs e)
 {
     string fio = grid_readers.CurrentRow.Cells["f_name"].Value.ToString()+" "+grid_readers.CurrentRow.Cells["l_name"].Value.ToString()+" "+grid_readers.CurrentRow.Cells["surname"].Value.ToString();
     issued_fm issued_fm = new issued_fm(conn, grid_readers.CurrentRow.Cells["login"].Value.ToString(),fio);
     issued_fm.Show();
 }