Re: Copy raw file image - C# Discussion Boards

8-Aug-10 18:27

hello

How can you copy raw file image into a byte[]?

I've tried, File.Open, then read bytes with different encoding - no luck

Should I try http://msdn.microsoft.com/en-us/library/a4b8basy.aspx[^]

Thanks

dev

Dave Kreskowiak8-Aug-10 19:09

8-Aug-10 19:09

You don't use an encoding. Encodings interpret the values read. You won't get the actual data from the file.

Use System.Io.File.ReadAllBytes[^].

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Dave Kreskowiak

devvvy8-Aug-10 19:46

8-Aug-10 19:46

This won't work - I need raw file image, include header + data

http://www.michaelyip.me.uk/projects/SaCF.pdf[^]

dev

Mustafa Ismail Mustafa8-Aug-10 20:13

Mustafa Ismail Mustafa

8-Aug-10 20:13

ReadAllBytes as the name implies reads all bytes, regardless of what they should be interpreted as. Its up to you to then translate them into whatever it is you wish.

If the post was helpful, please vote, eh!

Current activities:
Playing Star Craft II. Don't bother me, eh?

Now and forever, defiant to the end.
What is Multiple Sclerosis[^]?

devvvy8-Aug-10 20:35

8-Aug-10 20:35

I ran a simple experiement, read all byte of HelloWorld.exe and write it to second file - it didn't run and OS complained invalid image

dev

Richard MacCutchan8-Aug-10 21:24

Richard MacCutchan

8-Aug-10 21:24

Consider, if such a simple feature did not work then it would not be possible to do any form of data copying under Windows. Try showing your code, there must be an error somewhere.

It's time for a new signature.

Thomas Krojer8-Aug-10 22:31

Thomas Krojer

8-Aug-10 22:31

How did you write the new file? Post your code snipplet.

Dave Kreskowiak9-Aug-10 1:42

9-Aug-10 1:42

Then you did something else wrong in your code. Post the read and write sections and we may be able to tell you where that is.

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Dave Kreskowiak

Dave Kreskowiak9-Aug-10 1:41

9-Aug-10 1:41

Yeah, it will work since I used it to read and parse PE format executables myself.

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Dave Kreskowiak

Luc Pattyn9-Aug-10 1:26

Luc Pattyn

9-Aug-10 1:26

what do you mean by "raw file image"?
is it a file containing an image (i.e. header plus pixel data)?
is it a file containing the raw data of an image (i.e. pixel data only)?
is it the "image" of an executaable?

you can read( or write) all the bytes of a file at once using File.ReadAllBytes (WriteAllBytes).
If you don't want to have them all at once in memory, use a BinaryReader (BinaryWriter).

And what do you mean by "encoding"?
if it refers to the Encoding class, that one only applies to text.
if it refers to the way pixels get represented, that one is called PixelFormat.

Please learn to ask questions properly.

And don't say "it didn't run and OS complained invalid image", show the code and the exact compile-time or run-time error message(s).

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Message Removed

9-Aug-10 2:52

Re: thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet?

9-Aug-10 2:52

Message Removed

Luc Pattyn9-Aug-10 2:57

Luc Pattyn

9-Aug-10 2:57

No I do not understand you, you fail to provide necessary information and ask a clear question.

And no I did not suggest anything would be possible or impossible, as it is still completely unclear what you want in the first place.

Now stop reading things that are not present; and start providing information that is necessary but missing.

Mad | :mad:

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet?

devvvy9-Aug-10 3:06

Re: thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet?

9-Aug-10 3:06

Covean did - learn post only if you have something to offer mate

dev

Luc Pattyn9-Aug-10 3:17

Luc Pattyn

9-Aug-10 3:17

Please don't remove any messages that have been replied to. It is against the forum guidelines as it results in messy threads.

Yours said:

thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet?

which is what you also replied to Covean !?!?!?

Dead | X|

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet?

devvvy9-Aug-10 17:31

Re: thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet?

9-Aug-10 17:31

I figured originally i intend to reply to Covean, but instead went to you. To avoid further confusion I removed it (MOVED back to under Covean's thread)

dev

Thomas Krojer10-Aug-10 21:45

Thomas Krojer

10-Aug-10 21:45

@devvvy: YOU don´t understand: You were asked to provide the piece of code making troubles .... you didn´t, instead you started to moan ... ANYWAY:

byte[] an_image = File.ReadAllBytes("hello_world.exe");
File.WriteAllBytes("another_hello_world.exe", an_image);

No P/Invoke, not really difficult ...

hey thanks it works!

devvvy10-Aug-10 21:56

10-Aug-10 21:56

hey thanks it works!

<br />
        static void Main(string[] args)<br />
        {<br />
            string TargetFile = null;<br />
            byte[] an_image = null;<br />
<br />
            try<br />
            {<br />
                TargetFile = args[0];<br />
<br />
                if (!string.IsNullOrEmpty(TargetFil ))<br />
                {<br />
                    an_image = File.ReadAllBytes(TargetFile );<br />
                    File.WriteAllBytes("SomeClone.exe", an_image);<br />
                }<br />
            }<br />
            catch (Exception Ex)<br />
            {<br />
                Console.WriteLine("Yike");<br />
            }<br />
<br />
            return;<br />
        }<br />

dev

modified on Wednesday, August 11, 2010 4:30 AM

Re: hey thanks it works!

Thomas Krojer10-Aug-10 22:37

Thomas Krojer

10-Aug-10 22:37

your welcome

Re: hey thanks it works!

devvvy10-Aug-10 22:43

10-Aug-10 22:43

I must have made a mistake - I thought I tried ReadAllBytes too but apparently not.

dev

thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet? x

Covean9-Aug-10 2:28

Covean

9-Aug-10 2:28

If I'm right then he asks for a way to read all the file data plus the file system (NTFS as example) specific information.
On a hard disk there are also a file header / footer for every file.
Now this data he wants to read (and maybe) write.

1. Handle a file is the wrong approach you have to handle the file system in your case.
2. There is no class (or?) to read/write from/to the hard disk at this i/o level in C#.
3. Take a look at CreateFile. There is a possibility to read the physical disk.

Greetings
Covean

devvvy9-Aug-10 3:07

Re: thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet? x

9-Aug-10 3:07

thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet?

dev

Dave Kreskowiak9-Aug-10 3:43

Re: thanks yes you understand me - i will post the code but you're suggesting this can't be done in dotnet? x

9-Aug-10 3:43

He didn't "understand" you. He frickin' guessed at it using the link you posted and your replies in this thread.

I took a look at the link and guessed that you were trying to read the entire contents of the file, uninterpreted, because of the HexEdit screen shots in the link and your mentioning of using Encoding to read the file. You made no mention at all of what you were ultimately trying to do with this information.

Luc is correct. You still don't know how to ask a question in a format that is answerable, nor do you provide any of the details to questions that would fill in the missing bits of information critical to giving you the correct answer on the first try. You've demonstrated a history of this. People have to constantly guess at what you're talking about.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

devvvy9-Aug-10 17:32