How to remove attachments from a PDF using C# and VB.NET?
Syncfusion Essential PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can remove all the attachments or specified attachment from a PDF using C# and VB.NET.
Steps to remove attachments from PDF programmatically:
- Create a new C# console application project.
- Install the Syncfusion.Pdf.WinForms NuGet package as reference to your .NET Framework application from NuGet.org.
- Include the following namespace in the Program.cs file.
C#
using Syncfusion.Pdf.Interactive; using Syncfusion.Pdf.Parsing;
VB.NET
Imports Syncfusion.Pdf.Interactive Imports Syncfusion.Pdf.Parsing
- Use the following code snippet to remove attachments from the PDF document.
C#
//Loads the PDF document PdfLoadedDocument document = new PdfLoadedDocument("Attachment.pdf"); //Remove attachment by its name PdfAttachment attachment = document.Attachments[0]; document.Attachments.Remove(attachment); //Remove attachment by index document.Attachments.RemoveAt(1); //Remove all the attachments from collection document.Attachments.Clear(); //Saves the attachment removed document document.Save("Sample.pdf"); //Close the document document.Close(true); //This will open the PDF file so, the result will be seen in default PDF viewer Process.Start("Sample.pdf");
VB.NET
'Loads the PDF document Dim document As New PdfLoadedDocument("Attachment.pdf") 'Remove attachment by its name Dim attachment As PdfAttachment = document.Attachments(0) document.Attachments.Remove(attachment) 'Remove attachment by index document.Attachments.RemoveAt(1) 'Remove all the attachments from collection document.Attachments.Clear() 'Saves the attachment removed document document.Save("Sample.pdf") 'Close the document document.Close(True) 'This will open the PDF file so, the result will be seen in default PDF viewer Process.Start("Sample.pdf")
A complete working sample can be downloaded from RemoveAttachmentSample.zip.
Take a moment to peruse the documentation, where you can find other options like adding the attachment to an existing PDF document, 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.
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 remove attachments from 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.
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