iTextSharp - 在电子邮件附件中发送内存中的pdf [英] iTextSharp - Sending in-memory pdf in an email attachment

问题描述

我在这里问了几个问题，但仍然有问题。如果你能告诉我我在代码中做错了什么，我将不胜感激。我从ASP.Net页面运行上面的代码，并获得无法访问已关闭的流。

  var doc = new Document（）; 
 
 MemoryStream memoryStream = new MemoryStream（）; 
 
 PdfWriter.GetInstance（doc，memoryStream）; 
 doc.Open（）; 
 doc.Add（新段落（第一段））; 
 doc.Add（新段落（第二段））; 
 
 doc.Close（）; //如果我删除这行，电子邮件附件被发送但是0字节
 
 MailMessage mm =新的MailMessage（[e-mail]，[e-mail]）
 {
 Subject =subject，
 IsBodyHtml = true，
 Body =body
}; 
 
 mm.Attachments.Add（new Attachment（memoryStream，test.pdf））; 
 SmtpClient smtp = new SmtpClient 
 {
 Host =smtp.gmail.com，
 Port = 587，
 EnableSsl = true，
 Credentials =新的NetworkCredential（[e-mail]，my_password）
}; 
 
 smtp.Send（mm）; //无法访问已关闭的流错误在此抛出
  

谢谢!!!

编辑：

只是为了帮助某人寻找这个问题的答案，发送一个pdf文件的代码附在一个电子邮件，而不必物理地创建文件在下面（感谢Ichiban和Brianng）：

  var doc = new Document（） ; 
 MemoryStream memoryStream = new MemoryStream（）; 
 PdfWriter writer = PdfWriter.GetInstance（doc，memoryStream）; 
 
 doc.Open（）; 
 doc.Add（新段落（第一段））; 
 doc.Add（新段落（第二段））; 
 
 writer.CloseStream = false; 
 doc.Close（）; 
 memoryStream.Position = 0; 
 
 MailMessage mm = new MailMessage（[e-mail]，[e-mail]）
 {
主题=主题，
 IsBodyHtml = true，
 Body =body
}; 
 
 mm.Attachments.Add（new Attachment（memoryStream，filename.pdf））; 
 SmtpClient smtp = new SmtpClient 
 {
 Host =smtp.gmail.com，
 Port = 587，
 EnableSsl = true，
 Credentials =新的NetworkCredential（[e-mail]，密码）
 
}; 
 
 smtp.Send（mm）; 
  

解决方案

您尝试过：

  PdfWriter writer = PdfWriter.GetInstance（doc，memoryStream）; 
 
 //构建pdf代码... 
 
 writer.CloseStream = false; 
 doc.Close（）; 
 
 //生成电子邮件
 
 memoryStream.Position = 0; 
 mm.Attachments.Add（new Attachment（memoryStream，test.pdf））; 
  

如果我的内存正确地服务于我，这在以前的项目中解决了类似的问题。

请参阅 http://forums.asp.net/t /1093198.aspx

I've asked a couple of questions here but am still having issues. I'd appreciate if you could tell me what I am doing wrong in my code. I run the code above from a ASP.Net page and get "Cannot Access a Closed Stream".

var doc = new Document();

MemoryStream memoryStream = new MemoryStream();

PdfWriter.GetInstance(doc, memoryStream);
doc.Open();
doc.Add(new Paragraph("First Paragraph"));
doc.Add(new Paragraph("Second Paragraph"));

doc.Close(); //if I remove this line the email attachment is sent but with 0 bytes 

MailMessage mm = new MailMessage("[e-mail]", "[e-mail]")
{
    Subject = "subject",
    IsBodyHtml = true,
    Body = "body"
};

mm.Attachments.Add(new Attachment(memoryStream, "test.pdf"));
SmtpClient smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    Credentials = new NetworkCredential("[e-mail]", "my_password")
};

smtp.Send(mm); //the "Cannot Access a Closed Stream" error is thrown here

Thanks!!!

EDIT:

Just to help somebody looking for the answer to this question, the code to send a pdf file attached to an email without having to physically create the file is below (thanks to Ichiban and Brianng):

var doc = new Document();
MemoryStream memoryStream = new MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(doc, memoryStream);

doc.Open();
doc.Add(new Paragraph("First Paragraph"));
doc.Add(new Paragraph("Second Paragraph"));

writer.CloseStream = false;
doc.Close();
memoryStream.Position = 0;

MailMessage mm = new MailMessage("[e-mail]", "[e-mail]")
{
    Subject = "subject",
    IsBodyHtml = true,
    Body = "body"
};

mm.Attachments.Add(new Attachment(memoryStream, "filename.pdf"));
SmtpClient smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    Credentials = new NetworkCredential("[e-mail]", "password")

};

smtp.Send(mm);

解决方案

Have you tried:

PdfWriter writer = PdfWriter.GetInstance(doc, memoryStream);

// Build pdf code...

writer.CloseStream = false;
doc.Close();

// Build email

memoryStream.Position = 0;
mm.Attachments.Add(new Attachment(memoryStream, "test.pdf"));

If my memory serves me correctly, this solved a similar problem in a previous project.

See http://forums.asp.net/t/1093198.aspx

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