使用Memory Stream生成PDF文件作为system.net.mail.attachment [英] Generate a PDF file as system.net.mail.attachment using Memory Stream

问题描述

我有一个接受字符串并根据该字符串生成电子邮件附件的函数.它适用于html页面，文本文档等，但我无法生成PDF文件.

I have a function that accepts a string and generates an email attachment based on that string. It works fine for html pages, text documents, and so forth but I can not get it to generate a PDF file.

代码:

Public Sub SendMail _
( _
ByVal strFrom As String _
, ByVal strTo As String _
 , ByVal strSubject As String, ByVal strBody As String _
 , Optional ByVal attachment As String = "" _
 , Optional ByVal filename As String = "Attachment.HTML" _
)

    Dim sendMail As New SmtpClient
    Dim mail As New MailMessage(strFrom, strTo)
    Dim userToken As New Object


        mail.Subject = strSubject
        mail.Body = strBody

        mail.IsBodyHtml = True


        Using MemoryStream = New MemoryStream

            If attachment.Length <> 0 Then
                        Dim data As Byte() = Encoding.ASCII.GetBytes(attachment)
                        MemoryStream.Write(data, 0, data.Length)
                        MemoryStream.Seek(0, SeekOrigin.Begin)
                        MemoryStream.Position = 0

                        Dim content As New ContentType()
                        content.MediaType = MediaTypeNames.Application.Octet
                        content.Name = filename

                        Dim newAttach As New Attachment(MemoryStream, content)
                        mail.Attachments.Add(newAttach)
            End If


            sendMail.DeliveryMethod = SmtpDeliveryMethod.Network
            sendMail.Host = "SERVER"
            sendMail.UseDefaultCredentials = False
            sendMail.Credentials = New System.Net.NetworkCredential("UN", "PW")

            sendMail.Send(mail)


        End Using

如果我将文件附件另存为Whatever.PDF，则会收到错误消息，提示其编码不正确.不知道要使用PDF进行此工作需要做些什么，尝试过搜索google却没有找到任何对我有帮助的东西.

If I save the file attachment as Whatever.PDF i get the error that it was not encoded properly. Not sure what I need to do to have this work with PDF, have tried searching google but not finding anything that helps me.

已编辑:

我正在使用数据动力学活动报告PDF导出器来生成PDF

I am using datadynamics active reports PDF exporter to generate the PDF

dim pdf as new datadynamics.activereports.export.pdf.pdfexport
sendmail("from@", "to@", "test", "test", pdf.tostring, "pdf.pdf")

我认为问题是我正在将PDF转换为字符串，然后尝试将其转换回PDF并将其附加到电子邮件中，但是我不是100％确定.

I think the problem is I am converting the PDF to a string, and then trying to convert it back to a PDF and attach it to the email but I am not 100% sure.

谢谢.

推荐答案

我不熟悉这种报告技术，但是根据

I'm not familiar with this reporting technology, but according to documentation you should use something like this:

DataDynamics.ActiveReports.Export.Pdf.PdfExport p = new DataDynamics.ActiveReports.Export.Pdf.PdfExport();
string tmp = Path.GetTempFileName();
p.Export(rpt.Document, tmp, "1-10000");
byte[] pdf = File.ReadAllBytes(tmp);
File.Delete(tmp);

并从pdf数组构建MemoryStream或从tmp文件添加附件.

and build MemoryStream from pdf array or add attachment from tmp file.

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