.Net魔法堂：发个带附件的邮件

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一、前言

由于工作需要最近把邮件发送封装成WebService，现在把代码记录在此，以便日后查阅。

二、二话不说写代码

 private void _SendMail(string form, string pw, string subject, string[] to, string[] cc, string body, string attachmentName, byte[] attachment)

        {

            SmtpClient client = new SmtpClient(SMTP服务地址, SMTP服务端口);

            client.UseDefaultCredentials = true;

            client.Credentials = new NetworkCredential(form, pw); // 验证信息要与邮件发送源地址一致，否则无法发送

            client.DeliveryMethod = SmtpDeliveryMethod.Network;

            MailMessage message = new MailMessage();

            message.From = new MailAddress(form);

            foreach (string toItem in to)

            {

                message.To.Add(toItem);

            }

            foreach (string ccItem in cc)

            {

                message.CC.Add(ccItem);

            }

            message.Subject = subject;

            message.SubjectEncoding = Encoding.UTF8;

            message.Body = body;

            message.BodyEncoding = Encoding.UTF8;

            message.IsBodyHtml = true;

            message.Priority = MailPriority.High;

            Stream stream = null;

            Attachment data = null;

            try

            {

                if (attachment != null && attachment.Length > )

                {

                    stream = new MemoryStream(attachment);

                    data = new Attachment(stream, attachmentName, System.Net.Mime.MediaTypeNames.Application.Octet);

                    message.Attachments.Add(data);

                }

                client.Send(message);

            }

            finally

            {

                if (null != stream)

                {

                    stream.Close();

                }

            }

        }