private void Button_Click(object sender, RoutedEventArgs e) { if (objGeneralDba == null) { objGeneralDba = new GeneralDba(); } decimal transId = 0; if (Decimal.TryParse(transIdText.Text, out transId)) { if (objGeneralDba.CompletePMSTask(transId)) { MessageBox.Show("Transaction completed successfully "); this.Close(); } else { MessageBox.Show("Error in completing transaction"); } } }