variables default value

MrSpock

Hello,

I have a variable that is set by Delphi and therefore is "null" when I try to show the preview within the FR form.

Because the value is undefined, I only get an "expression expected" error.

Can I set a default value that is used as long as the value is not set from extern?

I tried:

  try      
  dummy := <RepTitle>;  
 except                   
    Set('RepTitle', '''Titel''');
 end;

in the BeforePrint Method and by this the report is generated and correctly shown, but still showing the error, because RepTitel is undefined in the try part of the exception.

gordk

use the ongetvalueevent in delphi it fires when the variable has no value.

MrSpock

gordk wrote: »

use the ongetvalueevent in delphi it fires when the variable has no value.

I must set this value without delphi. When I design a report, which uses Variables, that later will be set by delphi and currently have no value, then I want to set a defualt value in FastReport directly, to be able to preview the design without the need to compile and run the delphi application.

technisoft

Report -> Variables; Select variable and put a value into the expression box at the bottom.