用代码发送包含SharePoint文档作为附件的邮件

   MailMessage attachmentmessage = new MailMessage();
            attachmentmessage.From = new MailAddress("administrator@domain.com");
            attachmentmessage.To.Add(new MailAddress("test@domain.com"));
            attachmentmessage.IsBodyHtml = true;
            attachmentmessage.Body = "this is a test mail";
            attachmentmessage.Subject = "for testing";

            string url = "http://emiliu:8081/team/testlibrary/Doc1.docx";
            SPSite attachmentsite = new SPSite("http://emiliu:8081");
            SPWeb attachmentweb = attachmentsite.OpenWeb("/team");
            SPFile file = attachmentweb.GetFile(url);
            attachmentmessage.Attachments.Add(new Attachment(file.OpenBinaryStream(), file.Name));
            

            SmtpClient smtpClient = new SmtpClient("exchangeserver.domain.com");
            smtpClient.UseDefaultCredentials = true;
            smtpClient.Send(attachmentmessage);

Done.