Solved

TFileStream

Posted on 2001-09-14
8
311 Views
Last Modified: 2010-04-06
Hello,

Can Anyone give me an example how to read from a file with TFileStream?

Greetings,

Wim
0
Comment
Question by:wimhhf
  • 3
  • 3
  • 2
8 Comments
 
LVL 27

Expert Comment

by:kretzschmar
ID: 6482293
in which context?
0
 

Author Comment

by:wimhhf
ID: 6482317
I had a binary file:

I tried this:

var F: TFileStream
begin
  If OpenDialog1.Execute
  then Bestand.Create(OpenDialog1.FileName, fmOpenRead);
end;

the compiler gives a acces violation
0
 
LVL 17

Accepted Solution

by:
geobul earned 50 total points
ID: 6482332
Hi,

var F: TFileStream
begin
 If OpenDialog1.Execute then
   F := TFileStream.Create(OpenDialog1.FileName, fmOpenRead);
end;

Regards, Geo
0
The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

 
LVL 27

Expert Comment

by:kretzschmar
ID: 6482348
as geo said,
fast geo :-(

;-)
0
 
LVL 17

Expert Comment

by:geobul
ID: 6482459
Hi Meikl, I've got a new ISP and my connection goes at lightning speed :-)
0
 

Author Comment

by:wimhhf
ID: 6487486
But how can I read data on a specific address? Example: Data on address 0x0030.......
0
 
LVL 17

Expert Comment

by:geobul
ID: 6489578
Hi,

var
  Buf: array[1..255] of char;
begin
  // initialize the buffer
  FillChar(Buf, SizeOf(Buf), Ord(' '));
  // move the current stream cursor to the desired position
  F.Seek(48, soFromBeginning);
  // read 255 bytes from the stream
  F.Read(Buf, SizeOf(Buf));
  // Buf contains the next 255 bytes starting from 0x0030 now
  ...
end;

Regards, Geo
0
 

Author Comment

by:wimhhf
ID: 6489635
Thanks!
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

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

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

778 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