Convert HTML to PDF file in ASP.NET Core

13 Jan 20232 minutes to read

The Syncfusion HTML to PDF converter is a .NET library used to convert HTML or web pages to PDF document in ASP.NET Core application.

Steps to convert HTML to PDF in ASP.NET Core application

Step 1: Create a new C# ASP.NET Core Web Application project.
convert_HtmltoPdf_ASPNET_CORE1

Step 2: In configuration windows, name your project and select Next.
convert_HtmltoPdf_ASPNET_CORE2
convert_HtmltoPdf_ASPNET_CORE3

Step 3: Install Syncfusion.HtmlToPdfConverter.Net.Windows NuGet package as reference to your .NET Standard applications from NuGet.org.
convert_HtmltoPdf_ASPNET_CORE4

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

  • C#
  • using Syncfusion.Pdf;
    using Syncfusion.HtmlConverter;
    using System.IO;

    Step 5: Add a new button in index.cshtml as shown below.

  • C#
  • @{Html.BeginForm("ExportToPDF", "Home", FormMethod.Post);
        {
            <div>
                <input type="submit" value="Convert HTML to PDF" style="width:150px;height:27px" />
            </div>
        }
        Html.EndForm();
    }

    Step 6: Add a new action method named ExportToPDF in HomeController.cs and include the below code example to convert HTML to PDF document using Convert method in HtmlToPdfConverter class. The HTML content will be scaled based on the given ViewPortSize property of BlinkConverterSettings class.

  • C#
  • //Initialize HTML to PDF converter.
    HtmlToPdfConverter htmlConverter = new HtmlToPdfConverter();
    BlinkConverterSettings blinkConverterSettings = new BlinkConverterSettings();
    //Set Blink viewport size.
    blinkConverterSettings.ViewPortSize = new Syncfusion.Drawing.Size(1280, 0);
    //Assign Blink converter settings to HTML converter.
    htmlConverter.ConverterSettings = blinkConverterSettings;
    //Convert URL to PDF document.
    PdfDocument document = htmlConverter.Convert("https://www.syncfusion.com");
    //Create memory stream.
    MemoryStream stream = new MemoryStream();
    //Save and close the document. 
    document.Save(stream);
    document.Close(); 
    return File(stream.ToArray(), System.Net.Mime.MediaTypeNames.Application.Pdf, "HTML-to-PDF.pdf");

    By executing the program, you will get the PDF document as follows.
    Convert HTMLToPDF ASP.NET_Core output

    A complete working sample can be downloaded from Github.