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");

USING IRONPDF

How to Use C# to Convert PDF to Bitmap

Updated April 29, 2024

Introduction

The capacity to modify and alter digital content is essential in the ever-changing field of software development. Files in the Portable Document Format (PDF), which are widely used and highly adaptable, frequently hold important data. Nevertheless, effective conversion to bitmap formats is necessary for utilizing PDF material for image-based tasks or integrating it into visual applications. With IronPDF, a robust C# library that enables developers to convert PDF documents to bitmap images with accuracy, speed, and control, converting PDF to BMP format and saving as a BMP file with ease. To access a world of visual possibilities, we set out to investigate the nuances of C# PDF to bitmap conversion using IronPDF in this post.

How to Use C# to Convert PDF to Bitmap

Create a new C# project.
Install the IronPDF library.
Create a PDF object and pass the HTML string.
Convert the PDF object into Bitmap.
Save the image and dispose of the object.

Why Convert PDFs to Bitmaps?

Although PDFs are great at maintaining the style and layout of documents on many platforms, there are some circumstances in which bitmaps are useful. Below are some justifications for considering bitmap conversions from PDFs.

Image Processing: Bitmaps may be easily used with a variety of C# image processing tools, making it possible to perform image manipulation operations such as scaling, cropping, and filter application.
Interface with Graphical User Interfaces (GUIs): A lot of C# UI frameworks are bitmap-friendly, so you can show PDF material directly in your application's windows.
Data Extraction: Text extraction from scanned documents is made easier by OCR (Optical Character Recognition) algorithms, which typically work better with bitmaps than with PDFs.

IronPDF

IronPDF is a feature-rich solution that caters to the needs of developers for manipulating PDFs in C#. It stands out for being a complete solution. IronPDF is a flexible tool for many uses since it allows developers to easily create, edit, and extract content from PDF documents. Furthermore, developers may easily convert PDF pages into bitmap pictures thanks to IronPDF's strong rendering engine, enabling high-quality PDF-to-bitmap conversion.

Features of IronPDF

Developers may now access and manipulate PDF files programmatically with IronPDF's APIs for parsing PDF documents and extracting text, pictures, and other content.
PDF Rendering: During conversion, IronPDF's sophisticated rendering engine maintains fonts, images, and layout components to guarantee an accurate and authentic portrayal of PDF pages.
Image Export: IronPDF gives developers the ability to export PDF pages to many image formats, such as BMP, JPEG, PNG, and TIFF. This allows for flexibility and workflow compatibility with a wide range of image processing applications.
Performance Optimization: IronPDF prioritizes efficiency and performance. It does this by using parallel processing techniques and optimized algorithms to make PDF rendering and conversion activities move more smoothly.
Filling Out Interactive PDF Forms Programmatically is supported by IronPDF. Form fields, checkboxes, and dropdowns can be filled in by developers, which makes form-filling processes more automated and enhances user experience.
PDF Optimization: To minimize PDF file size without sacrificing quality, IronPDF provides optimization options. To increase speed and effectiveness, developers might reduce the size of images, eliminate extraneous components, and optimize typefaces.
Platform Compatibility: IronPDF can be used with a variety of C# applications because it works with both the .NET Framework and .NET Core. IronPDF easily integrates into your development environment whether you're creating cloud-based, desktop, or web-based applications.

Check out IronPDF's official documentation for the most up-to-date and accurate information.

Installing IronPDF

The Visual Command-Line interface is located under Tools in the Visual Studio Tools. Select the NuGet Package Manager. You need to type the following command on the package management terminal tab.

Install-Package IronPdf

The Package Manager approach is another option. The NuGet Package Manager option allows us to install the package directly into the solution. To find packages, use the search box on the NuGet website. All we have to do is search for "IronPDF" in the package manager, as the following screenshot shows:

How to Use C# to Convert PDF to Bitmap: Figure 1 - Installing IronPDF from the NuGet package manager

The image above shows the list of pertinent search results. Please make these settings so that the software can be installed on your system.

The package can now be used in the ongoing project when it has been downloaded and installed.

Convert PDF to Bitmap

Let's now explore the code that shows how the conversion is done. Using the following example, a PDF file is loaded, transformed into a set of AnyBitmap objects (one for each page), and then saved as separate BMP images:

using IronPdf;
class Program
{
    static void Main(string [] args)
    {
        var renderer = new IronPdf.HtmlToPdf();
        var pdfDocument = renderer.RenderHtmlAsPdf("<html><body><h1>Hello, IronPDF!</h1></body></html>");
        var bitmap = pdfDocument.ToBitmap();
        int i = 0;
        foreach ( var image in bitmap )
        {
            i = i + 1;
            image.SaveAs($"output_{i.ToString()}.bmp");
        }
}

using IronPdf;
class Program
{
    static void Main(string [] args)
    {
        var renderer = new IronPdf.HtmlToPdf();
        var pdfDocument = renderer.RenderHtmlAsPdf("<html><body><h1>Hello, IronPDF!</h1></body></html>");
        var bitmap = pdfDocument.ToBitmap();
        int i = 0;
        foreach ( var image in bitmap )
        {
            i = i + 1;
            image.SaveAs($"output_{i.ToString()}.bmp");
        }
}

Imports IronPdf
Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim renderer = New IronPdf.HtmlToPdf()
		Dim pdfDocument = renderer.RenderHtmlAsPdf("<html><body><h1>Hello, IronPDF!</h1></body></html>")
		Dim bitmap = pdfDocument.ToBitmap()
		Dim i As Integer = 0
		For Each image In bitmap
			i = i + 1
			image.SaveAs($"output_{i.ToString()}.bmp")
		Next image
	End Sub

VB C#

This sample of code runs through all the pages in the PDF file that has been loaded. The bitmap representation of the page content is obtained by calling the ToBitmap method for every page, which yields an AnyBitmap object. The bitmap image is then saved using the SaveAs technique, and the output filename is created using a numbering scheme.

Below are the simple steps to convert PDF to BMP image format:

The PDF file supplied is loaded using the PdfDocument.FromFile function.
The PdfDocument object's Pages property gives you access to a collection that represents each page in the PDF.
The conversion for a specific page is carried out via the PDF Page object's ToBitmap method, which returns the matching AnyBitmap object.
The AnyBitmap object's SaveAs function makes it easier to save the bitmap image file format to the designated.

Below is the output file generated from the above code.

How to Use C# to Convert PDF to Bitmap: Figure 2 - Example output file generated from the code above

Please refer to the documentation here for more information.

Conclusion

Finally, with IronPDF's extensive feature set for PDF manipulation, rendering, and conversion, C# developers can now fully realize the promise of PDF files. Leveraging IronPDF's sophisticated features, developers can easily convert PDF files to bitmap images for use in visual analytics projects, image-centric applications, and workflows.

Gaining proficiency in PDF to bitmap conversion using IronPDF opens up a world of possibilities, promoting creativity and efficiency in software development, regardless of your application—document management systems, visual reporting, or image-based analysis. With IronPDF by your side, you can add richness to your applications and delight users by converting static PDF document content into dynamic visual experiences.

IronPDF's $749 Lite edition comes with a year of software support, upgrade options, and a permanent license. Customers have a watermarked trial period during which they can assess the product in practical settings. To learn more about IronPDF's cost, licensing, and free trial. To learn more about the suite of products Iron Software offers, please visit this page.

NEXT >
How to Read a PDF Line By Line in C#