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