private void BtnCancelUpdate_Click(object sender, RoutedEventArgs e)
{
if (tb_LastTransactionInfo.IsSelected)
{
l.CancelUpdate();
}
else if (tb_FixedTransactionAttrib.IsSelected)
{
fta.CancelUpdate();
}
else if (tb_TransactionReference.IsSelected)
{
tr.CancelUpdate();
}
else if (tb_ControlledTransaction.IsSelected)
{
ct.CancelUpdate();
}
}