convert utf8 string for label

  • Thread starter Thread starter Chance Hopkins
  • Start date Start date
C

Chance Hopkins

I have an app that uses a socket to grab some data and ASCII encodes it to
store in a file.

Some times the data is supposed to be utf8 and start with =?Utf-8? when I
view it with notepad.

I'm trying to turn it back into the original text like so:

----------------------------------


if(myString.StartsWith("=?Utf-8?"))
{

//SOMEWHERE IN THESE TWO LINES IS THE ISSUE

byte[] temp = System.Text.ASCIIEncoding.Convert(System.Text.Encoding.UTF8,
System.Text.Encoding.ASCII,
System.Text.ASCIIEncoding.ASCII.GetBytes(currentMsg.Subject));
lblSubject.Text = "Subject: " +
System.Text.Encoding.ASCII.GetString(temp,0,temp.Length);

temp = null;
}
else
lblSubject.Text = myString;

----------------------------------

I just don't understand which encoding I have.

When I GetBytes, should it be ascii or utf8? (I think ascii)

When I Convert, am I going from ascii to utf8 or utf8 to ascii?


Can someone point me in the right direction, please.

Thanks.
 
As I correctly understand you you are talking about "encoded-words" (RFC
2047) that has the following format:

encoded-word = "=?" charset "?" encoding "?" encoded-text "?="

You should distinguish parsing for different encoding:
q - for quoted printable
b - base64

You can read more information about that formats in RFC2047. For example
base64-encoded text could be transformed back using the following code:

string decodedText =
Encoding.GetEncoding(charset).GetString(Convert.FromBase64String(encoded-text));

Long time ago I was writing .NET POP3 client that has parser of all that
stuff, maybe you can find here some useful code snippets:
http://sf.net/projects/nmailunit/
 
Sergey Bogdanov said:
As I correctly understand you you are talking about "encoded-words" (RFC
2047) that has the following format:

encoded-word = "=?" charset "?" encoding "?" encoded-text "?="
Click to expand...


YES. "Message Header Extensions" Appears to be it. Thank you. I will start
reading.
 
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