How I make to include a Ttable or Tquery like a parameter in a function or procedure.
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.
Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
Thanks Ciuly, but in the first option i have the parameter DS:TQuery, and when i call the function always receive a nil value. With the second option i receive an access violation. My program have some TQuery declared in a data module, an i like to pass diferent TQuery in the function depending of the user selection. It is possible that the error is in the call of the function?
if you do
procedure myproc(ds:TTable);
begin
assert(ds<>nil);
end;
and you get an assertion failure (otherwise said you are getting ds as nil in your proc) then it emans that you passed it as nil. I don't know your program logic or flow, but you should consider paying attention to threads if you are using them somewhere on the line of access to ttable.
probably the best solution is to step-through with the debugger and see where you are loosing the reference.
Dear Sirs:
The problem was in the function declaration. I declared two dataset in the folowing way:
Function MyProc(DS1, DS2:TDataset): boolean;
When i separate the two parameters
Function MyProc(DS1:TDataset; DS2: TDataset): boolean;
the problem was solved.
I don´t know the difference among the two declarations.
Best regards.
Business Accounts
Answer for Membership
by: ciulyPosted on 2006-12-14 at 22:19:27ID: 18144637
you mean like:
procedure myproc(ds:TTable); ?
or
procedure myproc(ds:TDataSet); ? (will be abel to pass all components that extend it)