将生成的文件保存到服务器

Question

I am generating a PDF with the handy iText for C#. Now, I basically just need to generate this PDF and e-mail it. At the moment I can generate the file in PDF, but I don't want to hardcode a path to save the file. Example, I am saving the file like this:

        string file = "C:\\Receipts\" + ConfirmationNumber + ".pdf";

Now, hardcoding a path like that is completely against best practices. How can I save the file properly, following best practice? Maybe to a folder inside the project itself? Thanks for any help.

Answer 1

If you have HttpContext, you can use PhysicalApplicationPath .

string filePath = string.Format("{0}\\App_Data\\ExportImport\\{1}", 
   HttpContext.Current.Request.PhysicalApplicationPath, fileName);

If you do not have HttpContext, you can use AppDomainAppPath .

string filePath = string.Format("{0}App_Data\\ExportImport\\{1}",
   HttpRuntime.AppDomainAppPath, fileName);

Answer 2

do you have to write the file to disk? It's easy enough to send an iText created pdf directly to email from this SO answer from 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);