text_plain.SetText(MIME_TransferEncodings.QuotedPrintable, Encoding.UTF8, plainTextBody);
multipartAlternative.BodyParts.Add(entity_text_plain);
//--- text/html -----------------------------------------
string htmlText = body;//"<html>这是一份测试邮件，<img src=https://www.jb51.net/article/\"cid:test.jpg\">来自<font color=red><b>LumiSoft.Net</b></font></html>";
MIME_Entity entity_text_html = new MIME_Entity();
MIME_b_Text text_html = new MIME_b_Text(MIME_MediaTypes.Text.html);
entity_text_html.Body = text_html;
text_html.SetText(MIME_TransferEncodings.QuotedPrintable, Encoding.UTF8, htmlText);
multipartAlternative.BodyParts.Add(entity_text_html);
//--- application/octet-stream -------------------------
WebClient client = new WebClient();
foreach (string attach in attachments.Keys)
{
try
{
byte[] bytes = client.DownloadData(attach);
using (MemoryStream stream = new MemoryStream(bytes))
{
multipartMixed.BodyParts.Add(Mail_Message.CreateAttachment(stream, attachments[attach]));
}
}
catch (Exception ex)
{
LogTextHelper.Error(ex);
}
}
#endregion
return msg;
}
而构造Mime格式的操作如下所示。
复制代码 代码如下:
private Mime Create_Html_Attachment_Image(string mailTo, string mailFrom, string mailFromDisplay,
string subject, string body, List<string> attachments, Dictionary<string, string> embedImages, string notifyEmail = "", string plaintTextTips = "",
string replyEmail = "")
{
Mime m = new Mime();
MimeEntity mainEntity = m.MainEntity;
mainEntity.From = new AddressList();
mainEntity.From.Add(new MailboxAddress(mailFromDisplay, mailFrom));
mainEntity.To = new AddressList();
mainEntity.To.Add(new MailboxAddress(mailTo, mailTo));
mainEntity.Subject = subject;
mainEntity.ContentType = MediaType_enum.Multipart_mixed;
//设置回执通知
if (!string.IsNullOrEmpty(notifyEmail) && ValidateUtil.IsEmail(notifyEmail))
{
mainEntity.DSN = notifyEmail;
}