Question

我想发送包含多个文件附件的电子邮件。

我使用System.Web.Mail.MailMessage，并在HttpFileCollection中添加所有文件附件。

MailMessage msg = new MailMessage();
string body = BodyTextBox.Text;
string smtpServer = "mail.MySite.com";
string userName = "info@Mysite.com";
string password = "***";
int cdoBasic = 1;
int cdoSendUsingPort = 2;
if (userName.Length > 0)
 {
   msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", smtpServer);
   msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 25);
   msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", cdoSendUsingPort);
   msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", cdoBasic);
   msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", userName);
   msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", password);
  }
 msg.To = "doc@Mysite.com";
 msg.From = "info@Mysite.com";
 msg.Subject = "Sent mail";
 msg.Body = body;
 if (fileUpload.HasFile)
  {
   int iUploadedCnt = 0;
   HttpFileCollection hfc = Request.Files;
   for (int i = 0; i <= hfc.Count - 1; i++)    // CHECK THE FILE COUNT.
    {
     HttpPostedFile hpf = hfc[i];
     if (hpf.ContentLength > 0)
      {
       hpf.SaveAs(Server.MapPath("Uploaded_Files\\") + Path.GetFileName(hpf.FileName));
       msg.Attachments.Add(new MailAttachment(Server.MapPath("Uploaded_Files\\") + Path.GetFileName(hpf.FileName)));
       }
     }
    }

   msg.BodyEncoding = System.Text.Encoding.UTF8;

   SmtpMail.SmtpServer = smtpServer;
   SmtpMail.Send(msg);

没关系，但我不想在服务器中保存文件，我想发送邮件而不保存。

Answer 1

使用System.Net.Mail.Attachment类而不是System.Web.Mail.MailAttachment类，您可以使用接受Stream作为第一个参数的重载：

HttpPostedFile hpf = hfc[i];
 if (hpf.ContentLength > 0)
 {       
   msg.Attachments.Add(new Attachment(hpf.InputStream, Path.GetFileName(hpf.FileName)));
 }

使用HttpFileCollection发送包含多个文件附件的邮件，而不先保存它

1 个答案: