将pvginkel/PdfiumViewer做了.Net Core 3.1的移植

Install-Package PdfiumViewer.Core

Install-Package PdfiumViewer.Native.x86_64.v8-xfa
Install-Package PdfiumViewer.Native.x86.v8-xfa

PdfiumViewer是基于PDFium项目的PDF查看器。

PdfiumViewer提供了许多用于处理PDF文件的组件：

PdfDocument是用于呈现PDF文档的基类；

PdfRenderer是一个WinForms控件，可以呈现PdfDocument；

PdfiumViewer是一个WinForms控件，它承载一个PdfRenderer控件，并且添加了一个工具栏来保存或打印PDF文件。

The PdfiumViewer library has been tested with Windows XP , Windows 8 and Windows 10, and is fully compatible with both. However, the native PDFium libraries with V8 support do not support Windows XP. See below for instructions on how to reference the native libraries.

The PdfiumViewer control requires native PDFium libraries. These are not included in the PdfiumViewer NuGet package. See the Installation instructions Wiki page for more information on how to add these.

The PdfiumViewer library primarily consists out of three components:

• The PdfViewer control. This control provides a host for the PdfRenderer control and has a default toolbar with limited functionality;
• The PdfRenderer control. This control implements the raw PDF renderer. This control displays a PDF document, provides zooming and scrolling functionality and exposes methods to perform more advanced actions;
• The PdfDocument class provides access to the PDF document and wraps the Pdfium library.

The PdfViewer control should only be used when you have a very simple use case and where the buttons available on the toolbar provide enough functionality for you. This toolbar will not be extended with new buttons or with functionality to hide buttons. The reason for this is that the PdfViewer control is just meant to get you started. If you need more advanced functionality, you should create your own control with your own toolbar, e.g. by starting out with the PdfViewer control. Also, because people currently are already using the PdfViewer control, adding more functionality to this toolbar would be a breaking change. See issue #41 for more information.

Instructions to build the PDFium library can be found on the Building PDFium wiki page. However, if you are just looking to use the PdfiumViewer component or looking for a compiled version of PDFium, these steps are not required. NuGet packages with precompiled PDFium libraries are made available for usage with PdfiumViewer. See the chapter on Using the library for more information.

Alternatively, the PdfiumBuild project is provided to automate building PDFium. This project contains scripts to build PdfiumViewer specific versions of the PDFium library. This project is configured on a build server to compile PDFium daily. Please refer to the PdfiumBuild project page for the location of the output of the build server. The PdfiumViewer specific libraries are located in the PdfiumViewer-... target directories.

PdfiumViewer is licensed under the Apache 2.0 license. See the license details for how PDFium is licensed.