Access variable in saved report

rbuser

Hi,

I create a report with Variable1 (type Boolean)
I saved this report and I load it dynamically.
What's the way to modify the value of Variable1 before preview or printing ?

Regards,

J-Luc !

nicocizik

Hi,

I would suggest using one of the template events to do this. The OnLoadEnd
event should do the trick.

----------------------------------------------
Tech Tip: Using Template Events
----------------------------------------------

The Report.Template object has several events that can be used for
customizing what happens when a report is loaded or saved:

- OnLoadStart
- OnLoadEnd
- OnNew
- OnSaveStart
- OnSaveEnd


The OnLoadEnd and OnNew events are often used to perform actions related
to report and data initialization.

The OnSaveEnd event is often used to save additional descriptive
("meta") data to the database each time the report is saved.

Example:

The Report.Template events are public and therefore must be assigned at
run-time.


1. In the private section of your form declaration you can declare an
event-handler method:

TForm = class(TForm)
private
procedure myTemplateOnLoadEndEvent(Sender: TObject);

public

end;


2. In the Form.OnCreate event, you can assign the event-handler to the
event:

procedure TForm1.FormCreate(Sender: TObject);
begin

ppReport1.Template.OnLoadEnd := myTemplateOnLoadEndEvent;

end;


3. Implement the event-handler method:

procedure TForm1.myTemplateOnLoadEndEvent(Sender: TObject);
begin

{add code here to initial the report or data, etc. }
ppReport1.PrinterSetup.MarginTop := 0.5;

end;


--

rbuser

Nico Cizik (Digital Metaphors) a présenté l'énoncé suivant :


Yes that's that I use !
I have found an example in your tech tips news.
To access a component, I use a loop and I test on component name

But my question is: Is it possible to access TppVariable and modify the
value before printing ?
I have tried with Parameters list but It seem that I can't change value
of one variable ...

--
J-L M. (Alphomega)
Perso: http://alphomega.free.fr
Boulot: http://Ecilia.fr
Dodo: http://DansMonlit.fr

nicocizik

Hi,

Sorry about that, I misunderstood the question. Parameters are probably the
best way to go with this. The reason the TppVariable's value is not showing
up is because ReportBuilder initialized all variable values before the
report prints. When using parameters, you will need to update the
TppVariable's value inside the OnCalc event to change it successfully.


--

rbuser

Nico Cizik (Digital Metaphors) a formulé la demande :

:-)



Thanks a lot !

--
J-L M. (Alphomega)
Perso: http://alphomega.free.fr
Boulot: http://Ecilia.fr
Dodo: http://DansMonlit.fr