Re: [DUG]: [Q] Component Property - Gives "Abstract Error"

[Donovan J. Edye]

N,

I got it solved as follows:

   TBaseDataLink = class(TPersistent)
   private
   protected
      procedure RetrieveData; virtual; abstract;

   TSimpleDataLink = class(TBaseDataLink)
   public
      procedure RetrieveData; override;

Discovered I had an "inherited;" in TSimpleDataLink.RetrieveData. Removed that (Doh!). That solved the Abstract Error problem. As for the project not compiling with a ASimpleDataLinkComponentOnForm.RetrieveData; I added the source of the component to the project search path and all is well. Not sure why I had to update the path though.


At 13:08 24/08/2001 +0700, you wrote:

RetrieveData?    (Sorry - have to ask <g>  ).

Yes.....

(Wonders what stooopid thing he has missed....)

does the TSimpleDataLink.RetrieveData declaration
have the "override" keyword?
 
If it doesn't - it's hiding the abstract one but
not overriding it.   (I get nailed by this when
I case ... i mean switch from C++)
 
(not sure that would cause the problem you
describe though).
 
-ns

-- Donovan
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Donovan J. Edye [www.edye.wattle.id.au]
Namadgi Systems [www.namsys.com.au]
Voice: +61 2 6285-3460
Fax: +61 2 6285-3459
TVisualBasic = Class(None);
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