Question

I have a WPF application, where I print labels for products. Sometimes, I have to print more than one copy of the same label. But the serial number will be different for each copy. I have a database table which keeps track of the last serial number printed. How can I do this using a formula?

Currently I am using the formula as below:

WhilePrintingRecords;
numbervar slno = ToNumber ({CustomerApp_TblBagLabel.TransactionNo});
slno := slno + 1;

Answer 1

Crystal Reports will not update a database (by design).

In your situation, I suggest the following approach (pseudo code):

begin transaction;

retrieve and increment transaction #;

open report;

pass transaction # to report (via a parameter would be easiest);

print report;

if report prints successfully then
  commit;
else
 rollback;
end if