You can add attachments to a PDF document from a file using the PdfDocumentCreateAttachmentFromFile methods or from PDF document data using the PdfDocumentCreateAttachmentFromData methods. The attachments can be represented in PDF pages by an icon or they can be created without an icon.
In this demo you can learn how to attach external files and streams to a PDF document. When you create the attachment you can also give a page and a location in page where to create a link to the attachment marked with an icon.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Hosting;
using HiQPdfClient;
namespace HiQPdf_Demo.Controllers
{
public class AttachmentsAndFileLinksController : Controller
{
IWebHostEnvironment m_hostingEnvironment;
public AttachmentsAndFileLinksController(IWebHostEnvironment hostingEnvironment)
{
m_hostingEnvironment = hostingEnvironment;
}
// GET: AttachmentsAndFileLinks
public ActionResult Index()
{
return View();
}
[HttpPost]
public ActionResult CreatePdf(IFormCollection collection)
{
string serverIP = collection["textBoxServerIP"];
uint serverPort = uint.Parse(collection["textBoxServerPort"]);
string serverPassword = collection["textBoxServerPassword"];
// create a PDF document
PdfDocument document = new PdfDocument(serverIP, serverPort);
// use server password if necessary
if (serverPassword.Length > 0)
document.ServerPassword = serverPassword;
// set a demo serial number
document.SerialNumber = "YCgJMTAE-BiwJAhIB-EhlWTlBA-UEBRQFBA-U1FOUVJO-WVlZWQ==";
// display the attachments when the document is opened
document.Viewer.PageMode = PdfPageMode.Attachments;
// create a page in document
PdfPage page1 = document.AddPage();
// create the true type fonts that can be used in document
PdfFont pdfFontEmbed = document.CreateFontFromName("Times New Roman", 10, true);
// create an attachment with icon from file
string filePath1 = m_hostingEnvironment.WebRootPath + "/DemoFiles/Attach/TextAttach1.txt";
PdfAttachment pdfAttachment1 = document.CreateAttachmentFromFile(page1, new RectangleFloat(10, 30, 10, 20),
PdfAttachIconType.PushPin, filePath1);
pdfAttachment1.Description = "Attachment with icon from a file";
// write a description at the right of the icon
PdfText pdfAttachment1Descr = new PdfText(40, 35, pdfAttachment1.Description, pdfFontEmbed);
page1.Layout(pdfAttachment1Descr);
// create an attachment with icon from a data
byte[] fileData2 = System.IO.File.ReadAllBytes(filePath1);
PdfAttachment pdfAttachment2 = document.CreateAttachmentFromData(page1, new RectangleFloat(10, 60, 10, 20),
PdfAttachIconType.Paperclip, fileData2, "AttachFromData_WithIcon.txt");
pdfAttachment2.Description = "Attachment with icon from data";
// write a description at the right of the icon
PdfText pdfAttachment2Descr = new PdfText(40, 65, pdfAttachment2.Description, pdfFontEmbed);
page1.Layout(pdfAttachment2Descr);
// create an attachment without icon in PDF from a file
string filePath2 = m_hostingEnvironment.WebRootPath + "/DemoFiles/Attach/TextAttach2.txt";
document.CreateAttachmentFromFile(filePath2, "Attachment without icon from a file");
// create an attachment without icon in PDF from data
byte[] fileData1 = System.IO.File.ReadAllBytes(filePath2);
document.CreateAttachmentFromData(fileData1, "AttachFromData_NoIcon.txt", "Attachment without icon from data");
try
{
// write the PDF document to a memory buffer
byte[] pdfBuffer = document.WriteToMemory();
FileResult fileResult = new FileContentResult(pdfBuffer, "application/pdf");
fileResult.FileDownloadName = "PdfAttachments.pdf";
return fileResult;
}
finally
{
document.Close();
}
}
}
}