473,809 Members | 2,712 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Finding a position in a binary file

I am a new programmer and I have a file that I need to find the
position of a certain set of characters? Can anyone help me? I also
need to be able to split the file at that point and write each part to
a temp file. Any help would be appreciated.

Thanks

Nick
Nov 20 '05 #1
3 1308
Hi Kingl,

When it is a textfile than it can be something as
Typed here watch typos.
\\\
dim a as integer = mytext.indexof( "MyCertainChara cters")
dim mytextBegin as string = mytext.substrin g(0, a)
dim mytextEnd as string = mytext.substrin g(a)
///
That should be enough,

I hope this helps?

Cor
I am a new programmer and I have a file that I need to find the
position of a certain set of characters? Can anyone help me? I also
need to be able to split the file at that point and write each part to
a temp file. Any help would be appreciated.

Thanks

Nick

Nov 20 '05 #2
Sorry see now your subject "binary file" I was focused at characters.

The solution I gave you is not for a "binary file".
Nov 20 '05 #3
* ki****@jaynet.w cmo.edu (kingnl) scripsit:
I am a new programmer and I have a file that I need to find the
position of a certain set of characters? Can anyone help me? I also
need to be able to split the file at that point and write each part to
a temp file. Any help would be appreciated.


Check out the 'System.IO.Bina ryReader' and the 'BinaryWriter' classes.

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>
Nov 20 '05 #4

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
2917
by: Cengiz Ulku | last post by:
Hi, I've already posted a question similar but will need some precisions and help. I have a rtf file displayed within a RTB control. Above it, I have a text box control with a scroller which helps me to increase/decrease numbers inside it by clicking. (There should be a shorter name for this control!!!) What I want is: Whenever I click the increase the number button, the
8
3022
by: Peter Abel | last post by:
Hi all, I'm working under W2k with Python 2.2.2 (#37, Oct 14 2002, 17:02:34) on win32 I have a file *test_data.txt* with the following content: 0123456789 0123456789 abcdefghi ABCDEFGHIJKLMNOPQ
13
15273
by: yaipa | last post by:
What would be the common sense way of finding a binary pattern in a ..bin file, say some 200 bytes, and replacing it with an updated pattern of the same length at the same offset? Also, the pattern can occur on any byte boundary in the file, so chunking through the code at 16 bytes a frame maybe a problem. The file itself isn't so large, maybe 32 kbytes is all and the need for speed is not so great, but the need for accuracy in the...
5
5856
by: Robert Manea | last post by:
Hello everyone, I wrote, simply as an exercise, a small piece of code to find 'strings' (defined as an amount of at least 3 ASCII characters followed by a non ASCII character) in binary files. The purpose of the program is to serve as a facile 'strings' (Unix command) replacement and to be 100% ANSI C. Unfortunatelly it operates notedly slower than the original 'strings' from the fileutils package.
6
7580
by: Tarun | last post by:
Hi All, I need to find a particular substring in a binary string(some text appended & prepended to binary data). I cant use strstr since it terminates on receiving '\0'which can be there in binary data also I cant use memmem. Is there any other available function to do this. Regards Tarun
2
13007
by: Keith Kingsley | last post by:
I'm using a StreamReader to read in several lines from an ASCII file. I'd like to know the StreamReader's "true" position-- that is, the number of bytes into the file that the StreamReader has read. I thought about using MyStreamReader.BaseStream.Position, but this always seems to return a multiple of the StreamReader's buffer size (which seems natural-- as I understand it the StreamReader reads from the underlying stream in discrete...
4
6362
by: spivee | last post by:
I'm having an odd type of issue. I want to be able to pass an element name in my javascript event and find the location of the element, be it a div, span, img whatever, specifically the top and left attributes. I have defined my element like so... ### .css file... #mydiv { position:absolute;
14
2823
by: prasadjoshi124 | last post by:
Hi All, I am writing a small tool which is supposed to fill the filesystem to a specified percent. For, that I need to read how much the file system is full in percent, like the output given by df -k lopgod10:~/mycrfile # df -k /mnt/mvdg1/vset Filesystem 1K-blocks Used Available Use% Mounted on
30
2019
by: mmgarvey | last post by:
Hi, I'm using python to develop some proof-of-concept code for a cryptographic application. My code makes extended use of python's native bignum capabilities. In many cryptographic applications there is the need for a function 'get_highest_bit_num' that returns the position number of the highest set bit of a given integer. For example:
0
9601
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10635
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10376
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10378
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10115
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
9198
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
7653
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6881
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5687
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.