Convert binary file->utf8->binary file

[Joey Lee]

Hi,
Does anyone know how I am able to write a utf-8 encoded binary string into
binary file?
Currently I am given a UTF-8 string which was read from a gif image.

Here are my functions...

public Byte[] GetDocument(str ing DocumentName)
{
string strdocPath;
strdocPath = DocumentName;
FileStream objfilestream = new
FileStream(strd ocPath,FileMode .Open,FileAcces s.Read);
int len = (int)objfilestr eam.Length;
Byte[] documentcontent s = new Byte[len];
objfilestream.R ead(documentcon tents,0,len);
objfilestream.C lose();
return documentcontent s;
}
public static string FromUTF8ByteArr ay(Byte[] characters)
{
System.Text.UTF 8Encoding encoding = new System.Text.UTF 8Encoding();
string constructedStri ng = encoding.GetStr ing(characters) ;
return (constructedStr ing);
}

public class RawEncoding
{
public static Byte[] GetBytes(string text)
{
Byte[] result = new Byte[text.Length];
for(int i = 0; i < text.Length; ++i)
{
result[i] = (Byte)text[i];
}
return result;
}
}

Byte[] utf8Bytes =
RawEncoding.Get Bytes(FromUTF8B yteArray(GetDoc ument(FILE_NAME )));
Byte[] finalBytes = Encoding.Conver t(Encoding.UTF8 , Encoding.Unicod e,
utf8Bytes);
string fileName = "test.gif";
FileStream fst = new FileStream(file _name, FileMode.Create );
fst.Write(final Bytes, 0, finalBytes.Leng th);
fst.Flush();
fst.Close();

Thanks

[Morten Wennevik]

Hi Joey,

I'm not sure you can safely convert a binary file to UTF8 without loss of data, but the procedure to convert the data to a file is to retrieve the bytes and feed them to a FileStream

string utf8String = // some value

byte[] data = Encoding.UTF8.G etBytes(s);
FileStream fs = File.Create("Ne wFile.gif");
fs.Write(data, 0, data.Length);
fs.Close();
--
Happy coding!
Morten Wennevik [C# MVP]

[Jon Skeet [C# MVP]]

Joey Lee <jo*********@ho tmail.com> wrote:

Does anyone know how I am able to write a utf-8 encoded binary string into
binary file?
Currently I am given a UTF-8 string which was read from a gif image.

That's a really, really bad idea. You can't just read arbitrary data
and assume it's a valid UTF-8 encoded string.

If you wish to turn arbitrary data into text, I suggest you use Base64
(see Convert.ToBase6 4String and Convert.FromBas e64String).

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too