使用 SelectPdf .NET 在电子邮件中附加 PDF，而不保存 PDF

我正在使用 SelectPdf 将 HTML 转换为 PDF 并将 PDF 发送到电子邮件中，而无需保存它并放入 MemoryStream，但电子邮件从未发送

如果我创建电子邮件而不附加 PDF，则始终发送。

这是我的代码：

 public void SendEmail(string htmlBody, string email, string emailBody, string subject)
    {
        PdfDocument doc = null;
        try
        {
            //Reading the html and converting it to Pdf
            HtmlToPdf pdf = new HtmlToPdf();
            doc = pdf.ConvertHtmlString(htmlBodyReservaPasajeros);
            var streamPdf = new MemoryStream(doc.Save()); 
            //creating the message
            message.From = new MailAddress(ConfigurationManager.AppSettings[url + "Email"]);
            message.To.Add(new MailAddress(email));
            message.Subject = subject;
            message.Body = HtmlBody;
            message.IsBodyHtml = true;
            if (doc != null)
            {
                 message.Attachments.Add(new Attachment(streamPdf , "Prueba.pdf", "application/pdf"));
            }
            //Sending the email
            ...
            //Closing
            streamPdf.Close();
            doc.Close(); 
        }            
        catch (Exception e)
        {
        }
    }

更新

我有两个问题：

• 首先：Gmail将电子邮件识别为跨度，但是...

• 第二：即便如此，我也不得不写文档。DetachStream（） 因为 pdf 已损坏。此函数将对象内存流从 PdfDocument 中分离出来，并将其释放。

最后代码是下一个：

public void SendEmail(string htmlBody, string email, string emailBody, string subject)
    {
        PdfDocument doc = null;
        try
        {
            //Reading the html and converting it to Pdf
            HtmlToPdf pdf = new HtmlToPdf();
            doc = pdf.ConvertHtmlString(htmlBodyReservaPasajeros);
            var streamPdf = new MemoryStream(doc.Save()); 
            **doc.DetachStream();**
            //creating the message
            message.From = new MailAddress(ConfigurationManager.AppSettings[url + "Email"]);
            message.To.Add(new MailAddress(email));
            message.Subject = subject;
            message.Body = HtmlBody;
            message.IsBodyHtml = true;
            if (doc != null)
            {
                 message.Attachments.Add(new Attachment(streamPdf , "Prueba.pdf", "application/pdf"));
            }
            //Sending the email
            ...
            //Closing
            streamPdf.Close();
            doc.Close(); 
        }            
        catch (Exception e)
        {
        }
    }

public void SendEmail(string htmlBody, string email, string emailBody, string subject)
{
  try
  {
    //Reading the html and converting it to Pdf
    HtmlToPdf pdf = new HtmlToPdf();
    PdfDocument doc = pdf.ConvertHtmlString(htmlBodyReservaPasajeros);
    using (MemoryStream memoryStream = new MemoryStream())
    { 
      doc.Save(memoryStream);
      byte[] bytes = memoryStream.ToArray();
      memoryStream.Close();
      MailMessage message= new MailMessage();
      message.From = new MailAddress(
        ConfigurationManager.AppSettings[url + "Email"]
      );
      message.To.Add(new MailAddress(email));
      message.Subject = subject;
      message.Body = htmlBody;
      message.IsBodyHtml = true;
      message.Attachments.Add(new Attachment(
        new MemoryStream(bytes),
        "Prueba.pdf"
      ));
      //Sending the email
      . . .
    }
    doc.Close(); 
  }            
  catch (Exception e)
  {
    // handle Exception
    . . .
  }
}

streamPdf.Position = 0;