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USING IRONPDF

How to Convert Image to PDF in C# [Code Example Tutorial]

Numerous libraries allow C# developers to convert images to PDFs. Finding a free, user-friendly library with good performance can be challenging, as some are paid, complex, or limited in functionality. Among these libraries, IronPDF stands out as a free, efficient, and easy-to-implement C# library. It comes with comprehensive documentation and a professional, responsive support team.

IronPDF is a .NET library for generating, reading, editing, and saving PDF files in .NET projects. IronPDF features HTML-to-PDF for .NET 5, Core, Standard & Framework with full HTML-to-PDF support, including CSS3 and JS.

Let's take a look at how to create a sample project to learn about converting images to PDF.

Create a Visual Studio Project

To create a new project, open Microsoft Visual Studio. It is recommended to use the latest version of Visual Studio. The steps for creating a new project may differ between versions, but the remainder should be the same for every version.

  1. Click on Create New Project.
  2. Select Project Template, then select the Console Application template for this demonstration. You can use any as per your requirement.
  3. Click on Next. Name the Project.
  4. Click Next and select the .NET Framework version.
  5. Click the Create button.

The new project will be created as shown below.

How to Convert Image to PDF in C# [Code Example Tutorial], Figure 1: Create a new Console Application in Visual Studio Create a new Console Application in Visual Studio

Next, install the IronPDF NuGet Package in this project to use its features. The interesting thing about IronPDF is that it takes the frustration out of generating PDF documents by not relying on proprietary APIs. HTML to PDF rendering example renders pixel-perfect PDFs from open standard document types: HTML, JS, CSS, JPG, PNG, GIF, and SVG. In short, it uses the skills that developers already possess.

Install the IronPDF NuGet Package

To install the NuGet Package, go to Tools > NuGet Package Manager > Package Manager Console. The following window will appear:

How to Convert Image to PDF in C# [Code Example Tutorial], Figure 2: Package Manager Console UI Package Manager Console UI

Next, write the following command in the Package Manager Console:

Install-Package IronPdf

Press Enter.

How to Convert Image to PDF in C# [Code Example Tutorial], Figure 3: Install the IronPdf package in the Package Manager Console Install the IronPdf package in the Package Manager Console

Convert Image File to PDF Document

The next step will show how to convert the following image to PDF.

Example Image

How to Convert Image to PDF in C# [Code Example Tutorial], Figure 4: The sample image The sample image

To use the library, reference the IronPDF library in the program.cs file. Write the following code snippet at the top of the file.

using IronPdf;
using IronPdf;
Imports IronPdf
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Next, write the following code inside the main function. This will convert a JPG file to a PDF file.

public static void Main(string[] args)
{
    // Convert a single image to the PDF document
    PdfDocument doc = ImageToPdfConverter.ImageToPdf(@"D:\Iron Software\ImageToPDF\bird.jpg", IronPdf.Imaging.ImageBehavior.CropPage);
    // Save the resulting PDF to the specified path
    doc.SaveAs(@"D:\Iron Software\ImageToPDF\bird.pdf");
}
public static void Main(string[] args)
{
    // Convert a single image to the PDF document
    PdfDocument doc = ImageToPdfConverter.ImageToPdf(@"D:\Iron Software\ImageToPDF\bird.jpg", IronPdf.Imaging.ImageBehavior.CropPage);
    // Save the resulting PDF to the specified path
    doc.SaveAs(@"D:\Iron Software\ImageToPDF\bird.pdf");
}
Public Shared Sub Main(ByVal args() As String)
	' Convert a single image to the PDF document
	Dim doc As PdfDocument = ImageToPdfConverter.ImageToPdf("D:\Iron Software\ImageToPDF\bird.jpg", IronPdf.Imaging.ImageBehavior.CropPage)
	' Save the resulting PDF to the specified path
	doc.SaveAs("D:\Iron Software\ImageToPDF\bird.pdf")
End Sub
$vbLabelText   $csharpLabel

In the above code example, the ImageToPdfConverter class provided by IronPDF is used for image conversion. The ImageToPdf method can be used to create PDF documents from images. It accepts both image files and a System.Drawing object as input.

The static method ImageToPdf converts a single image file to an identical PDF document of matching dimensions. It takes two arguments: Image Path and Image Behavior (how the image will display on paper). Imaging.ImageBehavior.CropPage will set the paper size equal to the image size. The default page size is A4. You can set it via the following line of code:

ImageToPdfConverter.PaperSize = IronPdf.Rendering.PdfPaperSize.Letter;
ImageToPdfConverter.PaperSize = IronPdf.Rendering.PdfPaperSize.Letter;
ImageToPdfConverter.PaperSize = IronPdf.Rendering.PdfPaperSize.Letter
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There are multiple page-size options provided, and you can set them as per your requirements.

Convert Multiple Images to a PDF File

The following example will convert JPG images into a new document.

public static void Main(string[] args)
{
    // Enumerate and filter JPG files from the specified directory
    var imageFiles = System.IO.Directory.EnumerateFiles(@"D:\Iron Software\ImageToPDF\")
                                        .Where(f => f.EndsWith(".jpg") || f.EndsWith(".jpeg"));
    // Convert the images to a PDF document and save it
    PdfDocument doc = ImageToPdfConverter.ImageToPdf(imageFiles);
    doc.SaveAs(@"D:\Iron Software\ImageToPDF\JpgToPDF.pdf");
}
public static void Main(string[] args)
{
    // Enumerate and filter JPG files from the specified directory
    var imageFiles = System.IO.Directory.EnumerateFiles(@"D:\Iron Software\ImageToPDF\")
                                        .Where(f => f.EndsWith(".jpg") || f.EndsWith(".jpeg"));
    // Convert the images to a PDF document and save it
    PdfDocument doc = ImageToPdfConverter.ImageToPdf(imageFiles);
    doc.SaveAs(@"D:\Iron Software\ImageToPDF\JpgToPDF.pdf");
}
Public Shared Sub Main(ByVal args() As String)
	' Enumerate and filter JPG files from the specified directory
	Dim imageFiles = System.IO.Directory.EnumerateFiles("D:\Iron Software\ImageToPDF\").Where(Function(f) f.EndsWith(".jpg") OrElse f.EndsWith(".jpeg"))
	' Convert the images to a PDF document and save it
	Dim doc As PdfDocument = ImageToPdfConverter.ImageToPdf(imageFiles)
	doc.SaveAs("D:\Iron Software\ImageToPDF\JpgToPDF.pdf")
End Sub
$vbLabelText   $csharpLabel

In the above code, System.IO.Directory.EnumerateFiles retrieves all files available in the specified folder. The Where clause filters all the JPG images from that folder and stores them in the imageFiles collection. If you have PNG or any other image format, you can just add that to the Where query.

The next line will take all the images and combine them into a single PDF document.

Print PDF File

The following code snippet will print the document:

doc.Print();
doc.Print();
doc.Print()
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The Print method provided by the PdfDocument class will print the document using the default printer. It also provides an option to change the printer name and other settings. For more details about printing documents, please visit this PDF printing example.

Summary

This tutorial showed a very easy way to convert images into a PDF file with code examples, either converting a single image into a PDF or combining multiple images into a single PDF file. Moreover, it also explained how to print documents with a single line of code.

Additionally, some of the important features of IronPDF include:

There are multiple useful and interesting features provided by IronPDF, please visit this IronPDF homepage for more details.

IronPDF is a part of the Iron Software suite. The Iron Suite includes additional interesting products such as IronXL, IronBarcode, IronOCR, and IronWebscraper, and all of these products are extremely useful. You can save up to 250% by purchasing the complete Iron Suite, as you can currently get all five products for the price of just two. Please visit the licensing details page for more details.

Frequently Asked Questions

How can I convert an image to a PDF in C#?

You can convert an image to a PDF in C# using IronPDF's ImageToPdf method. This method allows you to specify the image path and desired PDF output settings.

Can multiple images be converted into a single PDF file?

Yes, IronPDF enables you to convert multiple images into a single PDF file using the ImageToPdf method, where you provide a collection of image files.

What image formats are compatible with conversion to PDF?

IronPDF supports conversion of various image formats such as JPG, PNG, GIF, and SVG into PDF documents.

How do I set the page size when converting an image to a PDF?

To set the page size during conversion, use the PaperSize property within the ImageToPdfConverter class to select a standard size like Letter or A4.

Is it possible to print a PDF document created with IronPDF?

Yes, IronPDF includes a Print method within the PdfDocument class that allows you to print PDF documents using either default or specified printer settings.

What additional features does IronPDF offer?

IronPDF provides additional features such as generating PDFs from URLs, encrypting and decrypting PDFs, merging PDF files, and creating and editing PDF forms.

How do I install IronPDF in a Visual Studio project?

To install IronPDF in a Visual Studio project, open the Package Manager Console and run the command Install-Package IronPdf.

What are the advantages of using IronPDF for PDF generation?

IronPDF offers a simple, efficient, and well-documented API for PDF generation without relying on proprietary APIs. It also provides professional support and handles various PDF tasks effectively.

Chipego
Software Engineer
Chipego has a natural skill for listening that helps him to comprehend customer issues, and offer intelligent solutions. He joined the Iron Software team in 2023, after studying a Bachelor of Science in Information Technology. IronPDF and IronOCR are the two products Chipego has been focusing on, but his knowledge of ...Read More