using IronPdf; // Disable local disk access or cross-origin requests Installation.EnableWebSecurity = true; // 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.FindFormField("firstname"); FirstNameField.Value = "Minnie"; Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value); // Set and Read the value of the "lastname" field var LastNameField = FormDocument.Form.FindFormField("lastname"); LastNameField.Value = "Mouse"; Console.WriteLine("LastNameField value: {0}", LastNameField.Value); FormDocument.SaveAs("FilledForm.pdf");

Updated March 4, 2024

PDF API C# (Code Example Tutorial)

1. Introduction

Adobe's Portable Document Format (PDF) is essential for various operations in many companies, including generating documents and invoices. Developers also use it to meet client requirements. Libraries have simplified the process of creating PDFs. When choosing a library, consider aspects such as build, read, and conversion capabilities.

2. IronPDF Features

IronPDF is a robust PDF converter and API library that allows developers to generate, read, and manipulate PDF documents. It uses the Chrome engine to convert HTML to PDF and supports a variety of web components and .NET applications. It enables the creation of visually appealing PDFs using HTML5, JavaScript, CSS, and images, and includes a powerful HTML-to-PDF translator and an independent PDF conversion engine.

The IronPDF library supports a variety of inputs for PDF production, including image files, HTML5, ASPX, and Razor/MVC View.
The library has tools for creating interactive PDF files, finishing and sending interactive forms, dividing PDF files, extracting text and images, text searching, and rasterizing PDF pages to images.
In addition to using user agents, proxies, cookies, HTTP headers, and form variables for authentication behind HTML login forms, the library also offers the usage of links as the foundation for PDF documents.
IronPDF offers access to password-protected PDF files by requesting user names and passwords.
With the IronPDF API, pre-existing PDF files can be read and edited.
The library can extract pictures from PDF files and add text, graphics, bookmarks, watermarks, headers, and footers to PDF documents.
IronPDF enables users to divide and combine pages in a new or existing PDF document, and it can create PDF objects from text without using Acrobat Reader.
CSS files can be transformed into PDF files, and CSS media files can be converted into PDF documents.
IronPDF enables users to fill out existing PDF forms and add new ones.

3. Create PDF Documents from URLs

With the assistance of the IronPDF API library, generating PDF files becomes very easy by creating an HTML file from a URL and converting it to a PDF file using the built-in Chrome browser in IronPDF.

The methods listed below make it simple to create PDF documents with just a few lines of code:

IronPdf.ChromePdfRenderer renderer = new IronPdf.ChromePdfRenderer(); 
var pdf = renderer.RenderUrlAsPdf("https://www.google.co.in/"); 
pdf.SaveAs("result.pdf");

IronPdf.ChromePdfRenderer renderer = new IronPdf.ChromePdfRenderer(); 
var pdf = renderer.RenderUrlAsPdf("https://www.google.co.in/"); 
pdf.SaveAs("result.pdf");

Dim renderer As New IronPdf.ChromePdfRenderer()
Dim pdf = renderer.RenderUrlAsPdf("https://www.google.co.in/")
pdf.SaveAs("result.pdf")

VB C#

According to the information above, the RenderUrlAsPdf method can be used to convert the link into a document by providing the link and the save location.

PDF API C# (Code Example Tutorial), Figure 1: The PDF file generated from a URL The PDF file generated from a URL

4. Create a PDF from HTML Strings

The IronPDF API library makes it easy to convert HTML strings into PDF files. Below is an example code for converting HTML strings into documents, and it allows the translation of any HTML tag into PDF files.

IronPdf.ChromePdfRenderer().RenderHtmlAsPdf("Hello world!!").SaveAs("result.pdf");

IronPdf.ChromePdfRenderer().RenderHtmlAsPdf("Hello world!!").SaveAs("result.pdf");

IronPdf.ChromePdfRenderer().RenderHtmlAsPdf("Hello world!!").SaveAs("result.pdf")

VB C#

This example code demonstrates how to convert an unlimited HTML text using RenderHtmlAsPdf, then save the document using the SaveAs method and the whole process is completed in just a matter of seconds.

PDF API C# (Code Example Tutorial), Figure 2: A PDF file generated from an HTML string A PDF file generated from an HTML string

5. Reading PDF Documents

With the help of the IronPDF API library, it is possible to read and extract data from existing PDF documents. The code below shows an example of how to do this:

var pdfDocument = IronPdf.PdfDocument.FromFile("result.pdf");
string AllText = pdfDocument.ExtractAllText();

var pdfDocument = IronPdf.PdfDocument.FromFile("result.pdf");
string AllText = pdfDocument.ExtractAllText();

Dim pdfDocument = IronPdf.PdfDocument.FromFile("result.pdf")
Dim AllText As String = pdfDocument.ExtractAllText()

VB C#

In this code, the FromFile function is used to read the PDF from an existing file and convert it into a PdfDocument object. This object can be used to access the text and images present on the PDF pages. The ExtractAllText method can be used to create a string containing every word on the PDF pages.

For more information on how to use the IronPDF API library, refer to the code tutorials provided here.

6. Conclusion

The IronPDF library provides a free license for development, and different licenses are available for purchase for use in a production environment based on the developer's needs. The Lite package has a starting price of $749 and does not require any ongoing fees. The licenses offer redistribution options for SaaS and OEM and come with a permanent license, a 30-day money-back guarantee, and a year of product support and updates. They are suitable for development, staging, and production and require a one-time purchase. Moreover, IronPDF provides additional complimentary time-limited licenses. IronPDF also offers free licenses for redistribution coverage.

For more information on IronPDF's complete pricing and licensing details, please visit the licensing page.