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 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 latest version of native library here. Select appropriate library for your OS and platform (64 or 32 bit).

IMPORTANT

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

Basic converter

Use this converter in single threaded applications.

Create converter:

varconverter=newBasicConverter(newPdfTools());

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.

varconverter=newSynchronizedConverter(newPdfTools());

Define document to convert

vardoc=newHtmlToPdfDocument(){GlobalSettings={ColorMode=ColorMode.Color,Orientation=Orientation.Landscape,PaperSize=PaperKind.A4Plus,},Objects={newObjectSettings(){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:

vardoc=newHtmlToPdfDocument(){GlobalSettings={ColorMode=ColorMode.Color,Orientation=Orientation.Portrait,PaperSize=PaperKind.A4,Margins=newMarginSettings(){Top=10},Out=@"C:\DinkToPdf\src\DinkToPdf.TestThreadSafe\test.pdf",},Objects={newObjectSettings(){Page="http://google.com/",},}};

converter.Convert(doc);

Dependency injection

Converter must be registered as singleton.

publicvoidConfigureServices(IServiceCollectionservices){// Add converter to DIservices.AddSingleton(typeof(IConverter),newSynchronizedConverter(newPdfTools()));}