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POText Decoding Problem
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copied!<p>So given this input string:</p> <pre><code>=?ISO-8859-1?Q?TEST=2C_This_Is_A_Test_of_Some_Encoding=AE?= </code></pre> <p>And this function:</p> <pre><code>private string DecodeSubject(string input) { StringBuilder sb = new StringBuilder(); MatchCollection matches = Regex.Matches(inputText.Text, @"=\?(?<encoding>[\S]+)\?.\?(?<data>[\S]+[=]*)\?="); foreach (Match m in matches) { string encoding = m.Groups["encoding"].Value; string data = m.Groups["data"].Value; Encoding enc = Encoding.GetEncoding(encoding.ToLower()); if (enc == Encoding.UTF8) { byte[] d = Convert.FromBase64String(data); sb.Append(Encoding.ASCII.GetString(d)); } else { byte[] bytes = Encoding.Default.GetBytes(data); string decoded = enc.GetString(bytes); sb.Append(decoded); } } return sb.ToString(); } </code></pre> <p>The result is the same as the data extracted from the input string. What am i doing wrong that this text is not getting decoded properly?</p> <p>UPDATE</p> <p>So i have this code for decoding quote-printable:</p> <pre><code>public string DecodeQuotedPrintable(string encoded) { byte[] buffer = new byte[1]; return Regex.Replace(encoded, "=(\r\n?|\n)|=([A-F0-9]{2})", delegate(Match m) { if (byte.TryParse(m.Groups[2].Value, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out buffer[0])) { return Encoding.ASCII.GetString(buffer); } else { return string.Empty; } }); } </code></pre> <p>And that just leaves the underscores. Do i manually convert those to spaces (Replace("_"," ")), or is there something else i need to do to handle that?</p>

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