.NET中的电子邮件附件损坏

Question

I'm trying to attach a PDF attachment to an email being sent with System.Net.Mail. The attachment-adding part looks like this:

using (MemoryStream pdfStream = new MemoryStream())
{
    pdfStream.Write(pdfData, 0, pdfData.Length);

    Attachment a = new Attachment(pdfStream, 
        string.Format("Receipt_{0}_{1}.pdf", jobId, DateTime.UtcNow.ToString("yyyyMMddHHmm")));

    msg.Attachments.Add(a);

    SmtpClient smtp = new SmtpClient(serverName, port);
    smtp.Credentials = new NetworkCredential(fromEmailName, fromEmailPassword);
    smtp.Send(msg);
}

The problem is that the attachment gets corrupted on the other end. I found some discussion of this problem here , however the solution mentioned on that page used System.Web.Mail.MailAttachment, which was made obsolete in .NET 2.0.

I've tried changing the TransferEncoding in the Attachment class (which replaces MailAttachment), but had no luck. Has anyone solved this on .NET 2.0?

Answer 1

您是否尝试在创建附件之前执行pdfStream.Seek(0,SeekOrigin.Begin)以将流重置为开头？

Answer 2

Have you checked to make sure that the PDF document isn't already corrupted in the pdfData array? Try writing that to a file then opening it.

Cheers
Kev