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How to add attachment to a PDF using C# and VB.NET?

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Syncfusion Essential PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can add attachment to a PDF using C# and VB.NET. Attachments contain any kind of files with detailed information.

Steps to add attachment to the PDF programmatically:

  1. Create a new C# console application project. Create a console application project

Create new console application
  2. Install the Syncfusion.Pdf.WinForms NuGet package as reference to your .NET Framework application from NuGet.org. NuGet package reference

Install nuget packages
  3. Include the following namespace in the Program.cs file.

C#

using Syncfusion.Pdf;
using Syncfusion.Pdf.Interactive;
using System;

 

VB.NET

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Interactive
Imports System

 

  1. Use the following code snippet to add attachment to PDF document.

C#

//Creates a new PDF document
PdfDocument document = new PdfDocument();
//Creates an attachment
PdfAttachment attachment = new PdfAttachment("Input.txt");
attachment.ModificationDate = DateTime.Now;
attachment.Description = "Input.txt";
attachment.MimeType = "application/txt";
//Adds the attachment to the document
document.Attachments.Add(attachment);
//Save the PDF document
document.Save("Attachment.pdf");
//Close the PDF document
document.Close(true);
//This will open the PDF file so, the result will be seen in default PDF viewer 
Process.Start("Attachment.pdf");

 

VB.NET

'Creates a new PDF document
Dim document As New PdfDocument()
'Creates an attachment
Dim attachment As New PdfAttachment("Input.txt")
attachment.ModificationDate = DateTime.Now
attachment.Description = "Input.txt"
attachment.MimeType = "application/txt"
'Adds the attachment to the document
document.Attachments.Add(attachment)
'Save the PDF document
document.Save("Attachment.pdf")
'Close the PDF document
document.Close(True)
'This will open the PDF file so, the result will be seen in default PDF viewer 
Process.Start("Attachment.pdf")

 

A complete working sample can be downloaded from PDFAttachmentSample.zip.

By executing the program, you will get the PDF document as follows. Screenshot of output PDF file

Take a moment to peruse the documentation, where you can find options like removing the attachment from an existing PDF, extracting and saving an attachment to the disk and other features like File Link Annotation, File Attachment Annotation, and hyperlink to PDF with code examples.

Refer here to explore the rich set of Syncfusion Essential PDF features.

An online sample link to attach files in PDF document.


Note:

Starting with v16.2.0.x, if you reference Syncfusion® assemblies from the trial setup or the NuGet feed, include a license key in your projects. Refer to the link to learn about generating and registering the Syncfusion® license key in your application to use the components without a trial message.

 

Conclusion:

I hope you enjoyed learning about how to add attachment to a PDF using C# and VB.NET.

 

You can refer to our Flutter PDF feature tour page to learn about its other groundbreaking features and documentation, and how to quickly get started with configuration specifications. You can also explore our Flutter PDF Flutter PDF examples to understand how to create and manipulate data.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion®, you can try our 30-day free trial to explore our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums or feedback portal. We are always happy to assist you!

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