Question

我有一个.Net 4.5应用程序，它发送带有附件的电子邮件。当电子邮件在桌面上打开时，它可以正常工作，但是当在移动设备上打开时（在这种情况下为iPhone），附件显示为内联HTML而不是附件。

然而，当我将同一封电子邮件从我的桌面转发到手机时，附件会在我的手机上正确显示，所以我几乎可以肯定它与我如何指定mime或内容类型，处置等有关。我无法看到我做错了什么。

以下是代码 - 请注意

att.ContentType = new System.Net.Mime.ContentType("multipart/mixed");

确实会在iPhone上创建一个附件，但它的类型为= mime-attachment，无法打开。

我是难过的＆amp;客户等待 - 任何帮助非常感谢！

private void SendNotice(string body, string attachment, string email, bool pdf = false)
    {
        MailMessage message = new MailMessage();
        message.From = new MailAddress(ConfigurationManager.AppSettings["SMTP.SendFrom"]);
        message.Subject = ConfigurationManager.AppSettings["MatchedNoticeSubject"];
        message.To.Add(new MailAddress(email));
        message.ReplyToList.Add(new MailAddress(ConfigurationManager.AppSettings["SMTP.ReplyTo"]));
        message.Body = body;
        message.IsBodyHtml = true;

        Attachment att = Attachment.CreateAttachmentFromString(attachment, "SeniorInfo.html", System.Text.Encoding.ASCII, "text/html");

        //specifying this creates an attachment of type "mime-attachment" that does not open
        //att.ContentType = new System.Net.Mime.ContentType("multipart/mixed");

        message.Attachments.Add(att);
        SmtpClient server = new SmtpClient()
        {
            EnableSsl = (ConfigurationManager.AppSettings["SMTP.EnableSSL"].ToLower() == "true"),
            Host = ConfigurationManager.AppSettings["SMTP.Server"],
            Port = Convert.ToInt16(ConfigurationManager.AppSettings["SMTP.Port"]),
            Credentials = new System.Net.NetworkCredential(ConfigurationManager.AppSettings["SMTP.Account"], ConfigurationManager.AppSettings["SMTP.Password"])
        };
        server.Send(message);
    }

Answer 1

经过一些试验和错误摆弄解决了。

反直觉地，附件ContentDisposition对象是READONLY，这使我相信我无法插入它，但是读取对象显然是对实际Attachment.ContentDisposition的引用，因为在读取实例上设置值的确如此（显然）纠正问题。还使用Enum for MediaTypeNames（System.Net.Mime.MediaTypeNames.Text.Html），因为我不认为这是问题所在。

现在发送电子邮件如下：

private void SendMatchNotice(string body, string attachment, string email, bool pdf = false)
    {
        MailMessage message = new MailMessage();
        message.From = new MailAddress(ConfigurationManager.AppSettings["SMTP.SendFrom"]);
        message.Subject = ConfigurationManager.AppSettings["MatchedNoticeSubject"];
        message.To.Add(new MailAddress(email));
        message.ReplyToList.Add(new MailAddress(ConfigurationManager.AppSettings["SMTP.ReplyTo"]));
        message.Body = body;
        message.IsBodyHtml = true;
        // Create  the file attachment for this e-mail message.
        Attachment att = Attachment.CreateAttachmentFromString(attachment, "SeniorInfo.html", System.Text.Encoding.ASCII, System.Net.Mime.MediaTypeNames.Text.Html);
        System.Net.Mime.ContentDisposition disposition = att.ContentDisposition;
        disposition.DispositionType = "attachment";
        disposition.Inline = false;
        disposition.FileName = "SeniorInfo.html";
        disposition.CreationDate = DateTime.Now;
        disposition.ModificationDate = DateTime.Now;
        disposition.ReadDate = DateTime.Now;
        message.Attachments.Add(att);
        SmtpClient server = new SmtpClient()
        {
            EnableSsl = (ConfigurationManager.AppSettings["SMTP.EnableSSL"].ToLower() == "true"),
            Host = ConfigurationManager.AppSettings["SMTP.Server"],
            Port = Convert.ToInt16(ConfigurationManager.AppSettings["SMTP.Port"]),
            Credentials = new System.Net.NetworkCredential(ConfigurationManager.AppSettings["SMTP.Account"], ConfigurationManager.AppSettings["SMTP.Password"])
        };
        server.Send(message);
    }

在移动设备上显示内联的Asp.Net电子邮件附件（iPhone）

1 个答案: