RE: Byte Array to String

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Hi AG,

If the file contains character that exceed the ASCII char code scope(and
those chars are stored correctly), that means the file's content is not
stored as ASCII encoding(single byte charset).

Generally speaking, if you're reading a text file(which means its content
are character text rather than unreadable binary content), you should use
text reading mode to read them(rather than read them as byte and convert
them your self).

And to read file as text mode, you need to know what is the
encoding/charset of the text file's content. this info is needed when you
try reading the file in Text Mode. For example, you can use the
"StreamReader" class in .net to read file in text mode as below:

=================
StreamReader sr = new StreamReader("inputfile.txt", Encoding.UTF8);
string content = sr.ReadToEnd();

sr.Close();
================

or you can also let the StreamReader to determine the encoding
automatically (through file's BOM). But BOM(Byte Order mark) is not
existent in text file:

======================
StreamReader sr1 = new StreamReader("inputfile.txt", true);

string content1 = sr1.ReadToEnd();

sr1.Close();
=================

for your case, I think the file's encoding is likely not UTF8, and if you
use UTF8 to decode the byte, you'll probably get wrong character.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
Reply-To: "AG" <NOSPAMa-giam@xxxxxxxxxxxxxxxxx>
From: "AG" <NOSPAMa-giam@xxxxxxxxxxxxxxxxx>
Subject: Byte Array to String
Date: Wed, 21 Nov 2007 22:56:55 -0500

I have a file that contains ASCII and Extended ASCII characters.
I need to get the file contents into a string, but the Extended ASCII
characters (dec 128 and 129) are being changed to dec 63.

I have tried several methods, but here is the one I thought would have
worked.

Dim strReturn As String
Dim arBytes() As Byte
arBytes = System.IO.File.ReadAllBytes(<myfile>)
strReturn = System.Text.Encoding.UTF8.GetString(arBytes)

When I examine strReturn, I find that the chars that should be chr(128)
and
chr(129) are all chr(63).

The only thing I could get to work is

Dim strReturn As String = String.Empty
Dim arBytes() As Byte
Dim sB As New StringBuilder
Dim byT As Byte

arBytes = System.IO.File.ReadAllBytes(strPathFile)
For Each byT In arBytes
sB.Append(Chr(byT))
Next
strReturn = sB.ToString

Can anyone offer an explanation, and/or a better method?

--

AG
Email: discussATadhdataDOTcom




.

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