using IronPdf; // Instantiate Renderer var renderer = new ChromePdfRenderer(); // Create a PDF from a HTML string using C# var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>"); // Export to a file or Stream pdf.SaveAs("output.pdf"); // Advanced Example with HTML Assets // Load external html assets: Images, CSS and JavaScript. // An optional BasePath 'C:\site\assets\' is set as the file location to load assets from var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\"); myAdvancedPdf.SaveAs("html-with-assets.pdf");

using IronPdf; using System; // Step 1. Creating a PDF with editable forms from HTML using form and input tags // Radio Button and Checkbox can also be implemented with input type 'radio' and 'checkbox' const string formHtml = @" <html> <body> <h2>Editable PDF Form</h2> <form> First name: <br> <input type='text' name='firstname' value=''> <br> Last name: <br> <input type='text' name='lastname' value=''> <br> <br> <p>Please specify your gender:</p> <input type='radio' id='female' name='gender' value= 'Female'> <label for='female'>Female</label> <br> <br> <input type='radio' id='male' name='gender' value='Male'> <label for='male'>Male</label> <br> <br> <input type='radio' id='non-binary/other' name='gender' value='Non-Binary / Other'> <label for='non-binary/other'>Non-Binary / Other</label> <br> <p>Please select all medical conditions that apply:</p> <input type='checkbox' id='condition1' name='Hypertension' value='Hypertension'> <label for='condition1'> Hypertension</label><br> <input type='checkbox' id='condition2' name='Heart Disease' value='Heart Disease'> <label for='condition2'> Heart Disease</label><br> <input type='checkbox' id='condition3' name='Stoke' value='Stoke'> <label for='condition3'> Stoke</label><br> <input type='checkbox' id='condition4' name='Diabetes' value='Diabetes'> <label for='condition4'> Diabetes</label><br> <input type='checkbox' id='condition5' name='Kidney Disease' value='Kidney Disease'> <label for='condition5'> Kidney Disease</label><br> </form> </body> </html>"; // Instantiate Renderer var renderer = new ChromePdfRenderer(); renderer.RenderingOptions.CreatePdfFormsFromHtml = true; renderer.RenderHtmlAsPdf(formHtml).SaveAs("BasicForm.pdf"); // Step 2. Reading and Writing PDF form values. var FormDocument = PdfDocument.FromFile("BasicForm.pdf"); // Set and Read the value of the "firstname" field var FirstNameField = FormDocument.Form.GetFieldByName("firstname"); FirstNameField.Value = "Minnie"; Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value); // Set and Read the value of the "lastname" field IronPdf.Forms.FormField LastNameField = FormDocument.Form.GetFieldByName("lastname"); LastNameField.Value = "Mouse"; Console.WriteLine("LastNameField value: {0}", LastNameField.Value); FormDocument.SaveAs("FilledForm.pdf");

Published June 14, 2022

How to Combine Images Into One PDF

PDF files are a popular way of sharing documents across different platforms. PDF stands for Portable Document Format. PDF files preserve document formatting and content without losing any key data from the source document, which makes them a popular format for the interchange of information between different software packages, and even between different operating systems. PDF documents can be easily accessed by anyone with Adobe Reader installed, regardless of their device or computer system. This is one of the reasons why they are so common on the internet today.

A PDF file can contain far more information than an image file: text, graphics, images, and other elements such as multimedia, hyperlinks, or annotations that may contain text, sound, or video. We can also create a PDF file by merging multiple images into one PDF file. We have online tools for this. We will explore Adobe Acrobat Online and the IronPDF C# library's capacity to create PDF files using image files.

The Adobe Acrobat Online Tool

Adobe Acrobat is a computer program that creates, modifies, and saves PDF files. The app also lets users track changes to PDF documents, and allows comments to be made. Adobe Acrobat offers different versions of Adobe Acrobat online. The free version is available to anyone with an internet connection, and it comes with most of the features needed for reading and creating PDFs. The paid version allows users to create, sign and fill out a form electronically.

Adobe Acrobat Online is the latest cloud-based version of the software application that facilitates easy access to editing features from any device with an internet connection. It is available for anyone who wants to share or work on their PDFs from anywhere. Users can upload existing PDFs, create new ones online, or even convert existing documents into PDF files with just a few clicks. Adobe Acrobat Online does not require installation or maintenance on your computer, which means no more installation problems and all that constant updating. With the mobile app, you can go wherever you want without worrying about access to your documents.

In this article, we will see how we can use Adobe Acrobat Online to create a PDF document from multiple photos. We will combine multiple images and save the newly created PDF file to our system. Follow the steps below:

Step 1

Open the Adobe Acrobat Online website.

Step 2

You will need to log in to this website. If you don't have an Adobe Account, you need to create one by clicking on the signup button. Once you have signed up, click on the login button and enter your credentials to log in to the Adobe Acrobat website.

Step 3

Once you log in, you will see the interface for Adobe Acrobat Online. There will be many options related to PDFs. Next, click on the "All tools" tab.

Step 4

After that, you will see the list of tools offered by Adobe Acrobat Online. We need to select the "JPG to PDF" tool.

Step 5

This will now open a popup for the JPG-to-PDF tool. You will see the options to "Drag and Drop files" and "Add a file from your device". You will be able to drag and drop multiple pictures or select all the images from the device from either the same folder or a different folder.

After selecting all the photos, click on the continue button. This will merge multiple images into a single PDF file. The process will merge images without using third-party apps in a single document.

After conversion, you will see the output PDF in a tab. You can download the PDF to your system by clicking on the download tray button.

IronPDF: C# PDF Library

The IronPDF C#PDF library is a .NET library for reading, writing, and customizing PDF documents. The IronPDF C# library seeks to provide the most complete, accurate, and cross-platform source of information about PDFs. It offers a high-level API that is designed to be as intuitive as possible. The library provides access to the vast majority of features available in Acrobat, including those not provided free of charge by Adobe.

The library provides methods and properties that enable you to read and write PDF files using just a few lines of code. You can convert PDFs between different versions, read text and metadata from PDFs without extracting them, add pages to existing documents, insert images onto pages at various positions and scales, extract text from pages within documents, and create a new PDF from an existing document, and more. The library also includes support for images of various bit depths and formats, including PNGs and TIFFs. You can use the library to create your own PDFs or work with other peoples' PDFs. The library also provides support for creating and manipulating bookmarks, finding text within PDFs, extracting text from PDFs, extracting shapes from documents and adding them to new PDFs, splitting documents into pages, and merging them back together again.

In this article, we will take a look at how we can create a PDF file using multiple images. Let's now examine the code example for doing this.

Code Example

// PM> Install-Package IronPdf
using IronPdf;
using System.IO;
using System.Linq;

// One or more images as IEnumerable.  This example selects all JPEG images in a specific folder.
var ImageFiles = System.IO.Directory.EnumerateFiles(@"C:\project\assets").Where(f => f.EndsWith(".jpg") || f.EndsWith(".jpeg"));

// Convert the images to a PDF and save it.
ImageToPdfConverter.ImageToPdf(ImageFiles).SaveAs(@"C:\project\composite.pdf");

//Also see PdfDocument.RasterizeToImageFiles() method to flatten a PDF to images or thumbnails

// PM> Install-Package IronPdf
using IronPdf;
using System.IO;
using System.Linq;

// One or more images as IEnumerable.  This example selects all JPEG images in a specific folder.
var ImageFiles = System.IO.Directory.EnumerateFiles(@"C:\project\assets").Where(f => f.EndsWith(".jpg") || f.EndsWith(".jpeg"));

// Convert the images to a PDF and save it.
ImageToPdfConverter.ImageToPdf(ImageFiles).SaveAs(@"C:\project\composite.pdf");

//Also see PdfDocument.RasterizeToImageFiles() method to flatten a PDF to images or thumbnails

' PM> Install-Package IronPdf
Imports IronPdf
Imports System.IO
Imports System.Linq

' One or more images as IEnumerable.  This example selects all JPEG images in a specific folder.
Private ImageFiles = System.IO.Directory.EnumerateFiles("C:\project\assets").Where(Function(f) f.EndsWith(".jpg") OrElse f.EndsWith(".jpeg"))

' Convert the images to a PDF and save it.
ImageToPdfConverter.ImageToPdf(ImageFiles).SaveAs("C:\project\composite.pdf")

'Also see PdfDocument.RasterizeToImageFiles() method to flatten a PDF to images or thumbnails

VB C#

In the above code, we see how easy it is to convert multiple images to a PDF file with just a few lines of code. This is the power of IronPDF. You don't need to go online and log in to a website. Simply open the editor and write some code — and your PDF converter is ready to use. For more details, please visit this link.

Licensing

IronPDF is totally free for development purposes. However, at the production level, payment is required. IronPDF offers three plans. The Lite plan for individual developers, the professional plan for individuals or teams that need powerful PDF software without any limitations. The unlimited plan is designed for large corporations and agencies that need an enterprise-level solution. All three plans are free of charge during the development, evaluation, or testing phases, but if you decide to use IronPDF in production, you’ll need to pay the license fee. For new users, there is a 30-day free trial period with no strings attached! You can also purchase five Iron Software products for the price of two. More details can be found at this link.