/// <summary>
/// Decode the attachment to bytes
/// </summary>
/// <returns>Decoded attachment bytes</returns>
public byte[] DecodedAsBytes()
{
if (_rawAttachment == null)
{
return(null);
}
if (_contentFileName != "")
{
byte [] decodedBytes = null;
if (_contentType != null && _contentType.ToLower() == "message/rfc822".ToLower())
{
decodedBytes = Encoding.Default.GetBytes(Utility.DecodeText(_rawAttachment));
}
else if (_contentTransferEncoding != null)
{
string bytContent = _rawAttachment;
if (!IsEncoding("7bit"))
{
if (IsEncoding("8bit") && _contentCharset != null & _contentCharset != "")
{
bytContent = Utility.Change(bytContent, _contentCharset);
}
if (Utility.IsQuotedPrintable(_contentTransferEncoding))
{
decodedBytes = Encoding.Default.GetBytes(DecodeQP.ConvertHexContent(bytContent));
}
else if (IsEncoding("8bit"))
{
decodedBytes = Encoding.Default.GetBytes(bytContent);
}
else
{
decodedBytes = Convert.FromBase64String(Utility.RemoveNonB64(bytContent));
}
}
else
{
decodedBytes = Encoding.Default.GetBytes(bytContent);
}
}
else if (_contentCharset != null)
{
decodedBytes = Encoding.Default.GetBytes(Utility.Change(_rawAttachment, _contentCharset)); //Encoding.Default.GetString(Encoding.GetEncoding(_contentCharset).GetBytes(_rawAttachment));
}
else
{
decodedBytes = Encoding.Default.GetBytes(_rawAttachment);
}
return(decodedBytes);
}
else
{
return(null);
}
}
/// <summary>
/// Decode the attachment to text
/// </summary>
/// <returns>Decoded attachment text</returns>
public string DecodeAsText()
{
string decodedAttachment = null;
try
{
if (_contentType.ToLower() == "message/rfc822".ToLower())
{
decodedAttachment = Utility.DecodeText(_rawAttachment);
}
else if (_contentTransferEncoding != null)
{
decodedAttachment = _rawAttachment;
if (!IsEncoding("7bit"))
{
if (IsEncoding("8bit") && _contentCharset != null & _contentCharset != "")
{
decodedAttachment = Utility.Change(decodedAttachment, _contentCharset);
}
if (Utility.IsQuotedPrintable(_contentTransferEncoding))
{
decodedAttachment = DecodeQP.ConvertHexContent(decodedAttachment);
}
else if (IsEncoding("8bit"))
{
// Commented out by Hugh Hall to eliminate compile time warning.
//decodedAttachment=decodedAttachment;
}
else
{
decodedAttachment = Utility.deCodeB64s(Utility.RemoveNonB64(decodedAttachment));
}
}
}
else if (_contentCharset != null)
{
decodedAttachment = Utility.Change(_rawAttachment, _contentCharset); //Encoding.Default.GetString(Encoding.GetEncoding(_contentCharset).GetBytes(_rawAttachment));
}
else
{
decodedAttachment = _rawAttachment;
}
}
catch
{
decodedAttachment = _rawAttachment;
}
return(decodedAttachment);
}
/// <summary>
/// Decode text
/// </summary>
/// <param name="strText">Source text</param>
/// <returns>Decoded text</returns>
public static string DecodeText(string strText)
{
/*try
* {
* string strRet="";
* string strBody="";
* MatchCollection mc=Regex.Matches(strText,@"\=\?(?<Charset>\S+)\?(?<Encoding>\w)\?(?<Content>\S+)\?\=");
*
* for(int i=0;i<mc.Count;i++)
* {
* if(mc[i].Success)
* {
* strBody=mc[i].Groups["Content"].Value;
*
* switch(mc[i].Groups["Encoding"].Value.ToUpper())
* {
* case "B":
* strBody=deCodeB64s(strBody,mc[i].Groups["Charset"].Value);
* break;
* case "Q":
* strBody=DecodeQP.ConvertHexContent(strBody);//, m.Groups["Charset"].Value);
* break;
* default:
* break;
* }
* strRet+=strBody;
* }
* else
* {
* strRet+=mc[i].Value;
* }
* }
* return strRet;
* }
* catch
* {return strText;}*/
try
{
string strRet = "";
string[] strParts = Regex.Split(strText, "\r\n");
string strBody = "";
const string strRegEx = @"\=\?(?<Charset>\S+)\?(?<Encoding>\w)\?(?<Content>\S+)\?\=";
Match m = null;
for (int i = 0; i < strParts.Length; i++)
{
m = Regex.Match(strParts[i], strRegEx);
if (m.Success)
{
strBody = m.Groups["Content"].Value;
switch (m.Groups["Encoding"].Value.ToUpper())
{
case "B":
strBody = deCodeB64s(strBody, m.Groups["Charset"].Value);
break;
case "Q":
strBody = DecodeQP.ConvertHexContent(strBody); //, m.Groups["Charset"].Value);
break;
default:
break;
}
strRet += strBody;
}
else
{
if (!IsValidMIMEText(strParts[i]))
{
strRet += strParts[i];
}
else
{
//blank text
}
}
}
return(strRet);
}
catch
{ return(strText); }
/*
* {
* try
* {
* if(strText!=null&&strText!="")
* {
* if(IsValidMIMEText(strText))
* {
* //position at the end of charset
* int intPos=strText.IndexOf("=?");
* int intPos2=strText.IndexOf("?",intPos+2);
* if(intPos2>3)
* {
* string strCharset=strText.Substring(2,intPos2-2);
* string strEncoding=strText.Substring(intPos2+1,1);
* int intPos3=strText.IndexOf("?=",intPos2+3);
* string strBody=strText.Substring(intPos2+3,intPos3-intPos2-3);
* string strHead="";
* if(intPos>0)
* {
* strHead=strText.Substring(0,intPos-1);
* }
* string strEnd="";
* if(intPos3<strText.Length-2)
* {
* strEnd=strText.Substring(intPos3+2);
* }
* switch(strEncoding.ToUpper())
* {
* case "B":
* strBody=deCodeB64s(strBody);
* break;
* case "Q":
* strBody=DecodeQP.ConvertHexContent(strBody);
* break;
* default:
* break;
* }
* strText=strHead+strBody+strEnd;
* if(IsValidMIMEText(strText))
* return DecodeText(strText);
* else
* return strText;
* }
* else
* {return strText;}
* }
* else
* {return strText;}
* }
* else
* {return strText;}
* }
* catch
* {return strText;}*/
}
