DinkToPdf

.NET Core P/Invoke wrapper for wkhtmltopdf library that uses Webkit engine to convert HTML pages to PDF.

Install

Library can be installed through Nuget. Run command bellow from the package manager console:

PM> Install-Package YG.DinkToPdf

Copy native library to root folder of your project. From there .NET Core loads native library when native method is called with P/Invoke. You can find original version of native library here. Select appropriate library for your OS and platform (64 or 32 bit).

The modified version: YG.DinkToPDF is made for .net 8 and it has been tested to work in IIS with .net & installed. See this Readme.MD for the .net 8 version: https://github.com/yogigrantz/DinkToPdf/blob/master/YG.DinkToPdf/README.md

IMPORTANT

Original library was NOT tested with IIS. Library was tested in console applications and with Kestrel web server both for Web Application and Web API .

The .net 8 version, YG.DinkToPDF has been tested in IIS

Basic converter

Use this converter in single threaded applications.

Create converter:

var converter = new BasicConverter(new PdfTools());

Synchronized converter

Use this converter in multi threaded applications and web servers. Conversion tasks are saved to blocking collection and executed on a single thread.

var converter = new SynchronizedConverter(new PdfTools());

Define document to convert

var doc = new HtmlToPdfDocument()
{
    GlobalSettings = {
        ColorMode = ColorMode.Color,
        Orientation = Orientation.Landscape,
        PaperSize = PaperKind.A4Plus,
    },
    Objects = {
        new ObjectSettings() {
            PagesCount = true,
            HtmlContent = @"Lorem ipsum dolor sit amet, consectetur adipiscing elit. In consectetur mauris eget ultrices  iaculis. Ut                               odio viverra, molestie lectus nec, venenatis turpis.",
            WebSettings = { DefaultEncoding = "utf-8" },
            HeaderSettings = { FontSize = 9, Right = "Page [page] of [toPage]", Line = true, Spacing = 2.812 }
        }
    }
};

Convert

If Out property is empty string (defined in GlobalSettings) result is saved in byte array.

byte[] pdf = converter.Convert(doc);

If Out property is defined in document then file is saved to disk:

var doc = new HtmlToPdfDocument()
{
    GlobalSettings = {
        ColorMode = ColorMode.Color,
        Orientation = Orientation.Portrait,
        PaperSize = PaperKind.A4,
        Margins = new MarginSettings() { Top = 10 },
        Out = @"C:\DinkToPdf\src\DinkToPdf.TestThreadSafe\test.pdf",
    },
    Objects = {
        new ObjectSettings()
        {
            Page = "http://google.com/",
        },
    }
};

converter.Convert(doc);

Dependency injection

Converter must be registered as singleton.

public void ConfigureServices(IServiceCollection services)
{
    // Add converter to DI
    services.AddSingleton(typeof(IConverter), new SynchronizedConverter(new PdfTools()));
}