public static bool IsInlineAttachment(MapiAttachment att, MapiMessage msg)
{
switch (msg.BodyType)
{
case BodyContentType.PlainText:
// ignore indications for plain text messages
return false;
case BodyContentType.Html:
// check the PidTagAttachFlags property
if (att.Properties.Contains(0x37140003))
{
long? attachFlagsValue = att.GetPropertyLong(0x37140003);
if (attachFlagsValue != null && (attachFlagsValue & 0x00000004) == 0x00000004)
{
// check PidTagAttachContentId property
if (att.Properties.Contains(MapiPropertyTag.PR_ATTACH_CONTENT_ID) ||
att.Properties.Contains(MapiPropertyTag.PR_ATTACH_CONTENT_ID_W))
{
string contentId = att.Properties.Contains(MapiPropertyTag.PR_ATTACH_CONTENT_ID)
? att.Properties[MapiPropertyTag.PR_ATTACH_CONTENT_ID].GetString()
: att.Properties[MapiPropertyTag.PR_ATTACH_CONTENT_ID_W].GetString();
if (msg.BodyHtml.Contains(contentId))
{
return true;
}
}
// check PidTagAttachContentLocation property
if (att.Properties.Contains(0x3713001E) ||
att.Properties.Contains(0x3713001F))
{
return true;
}
}
else if ((att.Properties.Contains(0x3716001F) && att.GetPropertyString(0x3716001F) == "inline")
|| (att.Properties.Contains(0x3716001E) && att.GetPropertyString(0x3716001E) == "inline"))
{
return true;
}
}
else if ((att.Properties.Contains(0x3716001F) && att.GetPropertyString(0x3716001F) == "inline")
|| (att.Properties.Contains(0x3716001E) && att.GetPropertyString(0x3716001E) == "inline"))
{
return true;
}
return false;
case BodyContentType.Rtf:
// If the body is RTF, then all OLE attachments are inline attachments.
// OLE attachments have 0x00000006 for the value of the PidTagAttachMethod property
if (att.Properties.Contains(MapiPropertyTag.PR_ATTACH_METHOD))
{
return att.GetPropertyLong(MapiPropertyTag.PR_ATTACH_METHOD) == 0x00000006;
}
return false;
default:
throw new ArgumentOutOfRangeException();
}
}
// ExEnd:IdentifyInlineAndRegularAttachments
