How to convert HTML form to PDF form in ASP.NET Core?

The Syncfusion® HTML to PDF converter is a .NET library for converting webpages, SVG, MHTML, and HTML to PDF using C#. It is reliable and accurate. The result preserves all graphics, images, texts, fonts, and the layout of the original HTML document or webpage.

Using this library, you can convert a HTML form to PDF form in ASP.NET Core. This application uses the following HTML form for HTML to PDF conversion.

Steps to convert HTML form to PDF form programmatically in C#:

1. Create a new C# ASP.NET Core Web Application project.

2. Set the .NET version of ASP.NET Core Web Application (Model-View-Controller) project.

3. Install the Syncfusion.HtmlToPdfConverter.Net.Windows NuGet package as reference to your .NET Core application from NuGet.org.

4. A default controller with name HomeController.cs gets added on creation of ASP.NET Core project. Include the following namespaces in that HomeController.cs file.

C#

using Syncfusion.HtmlConverter;
using Syncfusion.Pdf;

5. A default action method named Index will be present in HomeController.cs. Right click on Index method and select Go to View where you will be directed to its associated view page index.cshtml.
6. Add a new button in the index.cshtml as shows below.

CSHTML

@{Html.BeginForm("ConvertHTMLToPDF", "Home", FormMethod.Get);
    {
        <div>
            <input type="submit" value="Convert HTML form to PDF form" style="width:250px;height:27px" />
        </div>
    }
    Html.EndForm();
}

7. Add a new action method ConvertHTMLToPDF in HomeController.cs and include the below code snippet to convert HTML form to PDF form and download it.

C#

//Initialize HTML to PDF converter 
HtmlToPdfConverter htmlConverter = new HtmlToPdfConverter();
 
//Initialize Blink converter settings
BlinkConverterSettings converterSettings = new BlinkConverterSettings();
 
//Enable the form to convert HTML form to PDF fillable form
converterSettings.EnableForm = true;
 
//Assign Blink settings to HTML converter settings
htmlConverter.ConverterSettings = converterSettings;
 
//Convert HTML to PDF document 
PdfDocument document = htmlConverter.Convert("HTMLForm.htm");
 
//Saving the PDF to the MemoryStream
MemoryStream stream = new MemoryStream();
document.Save(stream);
 
//Set the position as '0'
stream.Position = 0;
 
//Download the PDF document in the browser
FileStreamResult fileStreamResult = new FileStreamResult(stream, "application/pdf");
 
fileStreamResult.FileDownloadName = "Sample.pdf";
 
return fileStreamResult;

A complete working sample can be download from Convert-HTML-form-to-PDF-form.zip.

By executing the program, you will get the PDF document as follows.

Take a moment to peruse the documentation, where you can find converting HTML pages to PDF document along with respective customization options and features.

Refer here to explore the rich set of Syncfusion Essential® PDF features.

An online sample link to convert HTML to PDF document.