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Published May 31, 2023

How to Merge PDF Files in VB.NET

Introduction

Adobe created the Portable Document Format (PDF) so that text and graphic-rich documents could be shared. A PDF file must be opened online with an additional program. For key papers in today's society, PDF files are crucial. Utilizing PDF files, many firms produce documents and invoices. Developers create PDF documents to satisfy customer demands. Modern libraries have made it simpler than ever to create PDFs. We need to take into account a variety of aspects, such as build, read, and conversion capabilities, while choosing the best library for a project that employs this kind of library.

IronPDF Features

IronPDF, a powerful PDF SDK foundation for PDF processing, makes it simple for developers to produce, read, and edit PDF documents quickly. The IronPDF library converts HTML to PDF by using the Chrome engine. Xamarin, Blazor, Unity, HoloLens applications, Windows Forms, HTML, ASPX, Razor HTML, NET Core, ASP.NET, and WPF are just a few of the many web components that the library supports. Both conventional Windows applications and ASP.NET web applications can make use of Microsoft.NET and .NET Core programming.

IronPDF allows you to build PDFs that are visually appealing and contain a title and footer by utilizing HTML5, JavaScript, CSS, and pictures. Along with a powerful HTML-to-PDF converter that works with PDF files, the API library also has a standalone PDF conversion engine that is not dependent on any external resources.

• The IronPDF library allows users to create PDFs from a variety of inputs, including image files, HTML, HTML5, ASPX, and Razor/MVC View.
• The library provides applications for interactive form completion and submission, text searching, extracting text and photographs from PDF pages, and converting PDF pages to images.
• The library also offers the usage of user agents, proxies, cookies, HTTP headers, and form variables for authentication behind HTML login forms, as well as links as the foundation for PDF publications.
• Password-protected PDF files can be accessed with IronPDF in exchange for usernames and passwords.
• Using the IronPDF API, existing PDF files may be read and edited.
• The library can extract images from PDF files in addition to adding text, graphics, bookmarks, watermarks, headers, and footers to PDF files.
• Users can split and combine pages in a new or old PDF document. Without having an Acrobat Reader, IronPDF can also create PDF objects from text.
• From CSS files and CSS media files, PDF documents can be produced.
• IronPDF users have the option to upload new PDF forms as well as edit ones that already exist.

To know more about the Merge PDF files using IronPDF refer to the link here.

Creating a .NET Core 6 Project

The examples in the parts that follow in this newsletter show how simple the IronPDF library is to use.

Creating a new project to merge PDF files is the first step.

Choose "New Project" from the "File" menu when Visual Studio is open.

Select the "Console App" template in the ensuing dialogue box, then click "Next."

Any project name you pick should be entered in the Project name box, and the new project's location should be entered in the Location field. To continue, click the Next button.

From the Framework drop-down menu, pick a .NET Framework. In this case, we're utilizing the long-supported version of .NET, 6.0. Next, click on Create.

Next, download the solution's necessary IronPDF library. Use the following code on the package manager to accomplish this:

:PackageInstall

As an alternative, we can use the NuGet Package Manager to look for the IronPdf package.

A "Save As" dialogue box that enables us to save the created IronPDF to the chosen location has been added to our application.

Merge PDF files

You can utilize IronPDF to deal effectively with numerous or huge PDF files. When processing the documents, you can use less RAM thanks to the characteristics of lazy loading and incremental update built-in features. We can merge multiple PDF documents into a single PDF file with the new lines of code

Below is the sample code to merge multiple PDF files.

Imports System
Imports IronPdf
Module Program
    Sub Main(args As String())
        Dim firstPDF, secondPDF, Mergepdf As PdfDocument
        firstPDF = PdfDocument.FromFile("A.pdf")
        secondPDF = PdfDocument.FromFile("B.pdf")
        Mergepdf = PdfDocument.Merge(firstPDF, secondPDF)
        Mergepdf.SaveAs("MergeDoc.pdf")
    End Sub
End Module

Imports System
Imports IronPdf
Module Program
    Sub Main(args As String())
        Dim firstPDF, secondPDF, Mergepdf As PdfDocument
        firstPDF = PdfDocument.FromFile("A.pdf")
        secondPDF = PdfDocument.FromFile("B.pdf")
        Mergepdf = PdfDocument.Merge(firstPDF, secondPDF)
        Mergepdf.SaveAs("MergeDoc.pdf")
    End Sub
End Module

The above code snippets show how we can merge PDF documents using IronPDF. If you see the above code, first we are loading two PDF files A.pdf and B.pdf in to create a local variable for the PdfDocument object by using the fromfile function. Then IronPDF provides a separate function called merge which helps us to pass multiple PDF document objects as parameters which help us to merge PDF. After passing all the objects into the merge function, then we are using another function called SaveAs which helps us to save the combined PDF files into one PDF file.

The above image shows the two input PDF files. The output PDF file will be linked below.

OUTPUT PDF FILE

The above images show that the function combines the first and second PDF file that saves into a PDF file. Likewise, we can merge multiple PDF files. IronPDF can perform this process in a few milliseconds with few lines of code. Also, you can refer to this article here to know more about IronPDF.

Conclusion

IronPDF is straightforward and easy to use, and with just a few lines of code, we can produce PDF files. It is appropriate for beginners, and using this application requires only rudimentary expertise. There is no reliance between IronPDF and any other package. For instance, it is solely a single package library.

In addition to the free license that is offered, developers have the option of purchasing a range of licenses to meet their needs. All library features, such as a perpetual license, a 30-day money-back guarantee, a year of software support, upgrades, and potential for SaaS and OEM redistribution, are not included in the $749 Lite edition.

It also does not include ongoing costs. These licenses are one-time investments that can be used for production, staging, and development. Additionally, IronPDF offers time-limited, non-distributable free licenses. For complete pricing and licensing information about IronPDF, kindly go here.