Solved

Delphi Programming question

Posted on 1997-09-02
1
143 Views
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
0
Comment
Question by:mgesiot
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.
 
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How can I load a text file into a TVirtualStringTree? 17 105
delphi prevent click fast 2 189
Delphi Form ownership 4 70
Dev Express grid collapse 2 39
Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now