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Delphi Programming question

Posted on 1997-09-02
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Last Modified: 2010-05-18
Hello Delphiers.

OK, OK, I'm a newbe and probably this is the stupidest one you've seen;
But I want to convert my project to Delphi and get read of the
much hated VB ...(please help me)

I Was trying to convert the following VB code :


TYPE TMib
      Codice = String(4)
      Titolo = String(1)
      UC = Single;
END TYPE
...
PUBLIC Mib() = TMib
...
size = db.recordcount
redim mib(1 to size)
for count = 1 to size
      mib(count).Codice = db("codice")
      ....
Next count


The kindness of Bryan Valencia (Software Services - Making Windows Scream) helped me
see that if I needed resizable arrays of User Defined type I could use
TList, for TList is a resizeble arrray of objects.

NOW HERE START THE PROBLEM .......

I've tried the following code

unit G;

interface
uses
      classes;

type
      TMib = class(TObject)
                Codice : String[4];
                Titolo : String;
                Tipol  : String[1];
                Incr   : Integer;
                UltimoClose : Single;
end;

Type
      TMibList = class(TList)
end;

Var
      IsConnected, GiornataAperta : Boolean;
          Mib : TMibList;
          tmpMib : TMib;


.....

But every time I try to access the tmpMib or MIb variables I get stack overflows,
even after calling 'tmpMib.Create' (<- No error but the var is still nil )

      WHAT'S WRONG .....?

P.S. The documentation regarding the Object Pascal is (Edited by Computer101) !
      I, like may others, must write some quite complex programs,
      and all the books talk about are forms and ActiveX ....Thanks
      If anyoune can suggest a good book on the subject, it will be great

Great Thanks to anyone who'll read this, I know it has to be a stupid one !!!

      Mark Gesiot
      magesiot@tin.it
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Question by:mgesiot
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1 Comment
 
LVL 1

Accepted Solution

by:
flisakow earned 20 total points
ID: 1343347

The code to create objects is:
   tmpMib := TMib.Create;
   Mib := TMibList.Create;

by just calling the routine a variable was created, but you lost
the pointer to it.
 
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