private void ProcessMailMessage(IMessage msg, MailMessage outMsg)
{
//Copy some of the more important headers
outMsg.From = MailMessage.CreateEmailAddress(MapiUtils.GetStringProperty(msg, Tags.PR_SENDER_EMAIL_ADDRESS),
MapiUtils.GetStringProperty(msg, Tags.PR_SENDER_NAME));
if (MapiUtils.GetStringProperty(msg, Tags.ptagSentRepresentingName) != null) {
outMsg.ReplyTo = MailMessage.CreateEmailAddress(MapiUtils.GetStringProperty(msg, Tags.ptagSentRepresentingEmailAddr),
MapiUtils.GetStringProperty(msg, Tags.ptagSentRepresentingName));
}
outMsg.Subject = MapiUtils.GetStringProperty(msg, Tags.PR_SUBJECT);
IMAPITable recipientsTable = null;
msg.GetRecipientTable(0, out recipientsTable);
using (recipientsTable) {
MAPI33.MapiTypes.Value[,] rows;
recipientsTable.SetColumns(new Tags[] {Tags.PR_RECIPIENT_TYPE, Tags.PR_EMAIL_ADDRESS, Tags.PR_DISPLAY_NAME},
IMAPITable.FLAGS.Default);
for( ;recipientsTable.QueryRows(1, 0, out rows) == Error.Success && rows.Length > 0; ) {
MAPI33.WellKnownValues.PR_RECIPIENT_TYPE recipType = (MAPI33.WellKnownValues.PR_RECIPIENT_TYPE)((MapiInt32)rows[0,0]).Value;
String emailAddr = null;
String emailName = null;
if (rows[0, 1] is MapiString) {
emailAddr = ((MapiString)rows[0, 1]).Value;
}
if (rows[0, 2] is MapiString) {
emailName = ((MapiString)rows[0, 2]).Value;
}
AddressType type = AddressType.To;
switch (recipType) {
case MAPI33.WellKnownValues.PR_RECIPIENT_TYPE.To:
type = AddressType.To;
break;
case MAPI33.WellKnownValues.PR_RECIPIENT_TYPE.Cc:
type = AddressType.Cc;
break;
case MAPI33.WellKnownValues.PR_RECIPIENT_TYPE.Bcc:
type = AddressType.Bcc;
break;
}
outMsg.AddRecipient(emailAddr, emailName, type);
}
}
//Set the body. There can be a plain Body, which is the plain text version of the message,
//as well as an HtmlBody, which includes rich text formatting via HTML.
//
//This is complicated by the fact that, in MAPI, there are three possible sources
//of the body: PR_BODY (plain text body), PR_BODY_HTML (HTML body), and PR_RTF_COMPRESSED
//(RTF body). Based on empirical observation, there is nearly always a PR_BODY, which is not surprising
//as every HTML mail client I've ever encountered sends multi-part MIME messages with a plain text version
//as well as HTML. PR_BODY_HTML *seems* to be the HTML version of the message as specified by the sender,
//and may not be present in plain text messages.
//
//It only gets complicated with PR_RTF_COMPRESSED (or just PR_RTF for short). Often, HTML messages
//don't have a PR_HTML at all, but rather a PR_RTF that has a bunch of RTF tags wrapped around the original
//HTML of the message. All messages I've seen have a PR_RTF, however only messages which were originally
//received as HTML and subsequently transmogrified into RTF include the \@fromhtml RTF tag.
//
//Thus, the existence of this \@fromhtml tag is a roundabout way of determining if a message came from
//the sender as HTML or text (ignoring for now the third possiblity; an older Exchange client using RTF).
//
//Therefore, when setting BodyHtml, we first check if PR_RTF includes this \@fromhtml (that's what
//MapiUtils.BodyRtfToHtml does, among other things). If it doesn't, BodyHtml is set to null. If it
//does, PR_BODY_HTML is checked first, and used to populate BodyHtml if it's non-null. Failing that, the
//unwrapped HTML from PR_RTF is used. So:
//
// Body: Always PR_BODY
// HtmlBody: PR_BODY_HTML if PR_BODY_HTML is non-null and PR_RTF includes the \@fromhtml tag
// The HTML embedded in PR_RTF if PR_BODY_HTML is null and PR_RTF includes \@fromhtml
// Else null.
String propVal = null;
if ((propVal = MapiUtils.GetLongStringProperty(msg, Tags.PR_BODY)) != null) {
outMsg.Body = propVal;
}
//Check for HTML embedded in PR_RTF
byte[] rtf = MapiUtils.GetBodyRtf(msg);
if (rtf != null) {
outMsg.HtmlBody = MapiUtils.BodyRtfToHtml(rtf);
if (outMsg.HtmlBody != null) {
//There's HTML. use PR_HTML if it's there, else stick w/ what we have
if ((propVal = MapiUtils.GetLongStringProperty(msg, Tags.PR_BODY_HTML)) != null) {
outMsg.HtmlBody = propVal;
}
}
}
//Copy the attachments
CopyAttachments(msg, outMsg);
//Output all of the MAPI properties as extended headers, just in case they are needed later
DumpMapiProperties(msg, outMsg);
}