C#
我在这里问了几个问题,但仍然有问题。 如果你能告诉我我的代码中我做错了什么,我将不胜感激。 我从ASP.Net页面运行上面的代码,并得到“无法访问封闭的流”。
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("username@gmail.com", "username@gmail.com")
{
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("username@gmail.com", "my_password")
};
smtp.Send(mm); //the "Cannot Access a Closed Stream" error is thrown here
谢谢!!!
编辑:
只是为了帮助有人寻找这个问题的答案,发送附加到电子邮件的pdf文件而不必物理创建文件的代码如下(感谢Ichiban和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("username@gmail.com", "username@gmail.com")
{
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("username@gmail.com", "password")
};
smtp.Send(mm);
你有没有尝试过:
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"));
如果我的记忆正确地为我服务,这解决了以前项目中的类似问题。
请参阅http://forums.asp.net/t/1093198.aspx
我尝试了brianng发布的代码,它工作。 只需将代码的顶部更改为:
var doc = new Document();
MemoryStream memoryStream = new MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(doc, memoryStream); //capture the object
doc.Open();
doc.Add(new Paragraph("First Paragraph"));
doc.Add(new Paragraph("Second Paragraph"));
writer.CloseStream = false; //set the closestream property
doc.close(); //close the document without closing the underlying stream
memoryStream.Position = 0;
/* remainder of your code stays the same*/
您可以刷新文档或内存流,然后在附加它后关闭它?
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