NetCore实战：基于html生成pdf文件案例讲解

一、WkHtmlToPdfDotNet介绍

二、安装

三、运行效果

一、WkHtmlToPdfDotNet介绍

WkHtmlToPdfDotNet是基于本地 wkhtmltopdf封装的.NET Core类库，主要通过webkit引擎实现html页面转换为pdf文件。并且支持在Windows、Docker、Linux、MacOSX运行。

主要功能实现在线URL转pdf文件或者html代码直接转换为pdf文件，并对css样式、图片等很好的支持，导出的pdf文件和网站相差不大。

今天给大家通过实际的案例给大家介绍一下如何使用它，感兴趣的朋友可以一起来学习一下！

官网：https://github.com/HakanL/WkHtmlToPdf-DotNet

二、安装

1、使用Visual Studio 2019及以上版本创建一个.NET Core控制台程序。

2、安装WkHtmlToPdfDotNet依赖包

命令方式安装

工具→NuGet包管理器→程序包管理器控制包

安装命令如下：

 Install-Package Haukcode.WkHtmlToPdfDotNet

直接通过Nuget包搜索安装

工具→NuGet包管理器→管理解决方案的NuGet程序包

3、实现代码

using System;
using System.IO;
using WkHtmlToPdfDotNet;
namespace HtmlToPdf
{class Program{// https://github.com/HakanL/WkHtmlToPdf-DotNet// 安装依赖包 Install-Package Haukcode.WkHtmlToPdfDotNetstatic void Main(string[] args){//ConvertHtmlToPdf();ConvertUrlToPdf();}/// <summary>/// 基于html导出pdf/// </summary>private static void ConvertHtmlToPdf(){var converter = new BasicConverter(new PdfTools());// 绑定转换过程中处理事件日志
            converter.PhaseChanged += Converter_PhaseChanged;
            converter.ProgressChanged += Converter_ProgressChanged;
            converter.Finished += Converter_Finished;
            converter.Warning += Converter_Warning;
            converter.Error += Converter_Error;// pdf 样式设置var doc = new HtmlToPdfDocument(){
                GlobalSettings = {
                    ColorMode = ColorMode.Color,
                    Orientation = Orientation.Landscape,
                    PaperSize = PaperKind.A4,},
                Objects = {new ObjectSettings() {
                        PagesCount = true,
                        HtmlContent = @" <p style='color:red'>hello</p><h2>测试</h2><img src='https://www.baidu.com/img/pc_675fe66eab33abff35a2669768c43d95.png' alt=''>",
                        WebSettings = { DefaultEncoding = "utf-8" },
                        HeaderSettings = { FontSize = 9, Right = "Page [page] of [toPage]", Line = false },
                        FooterSettings = { FontSize = 9, Right = "Page [page] of [toPage]" }}}};// 转换为二进制byte[] pdf = converter.Convert(doc);// 判断目录是否存在，不存在则创建if (!Directory.Exists("Files")){
                Directory.CreateDirectory("Files");}// 文件保存using (var stream = new FileStream(Path.Combine("Files", DateTime.UtcNow.Ticks.ToString() + ".pdf"), FileMode.Create)){
                stream.Write(pdf, 0, pdf.Length);}}/// <summary>/// 基于url导出pdf/// </summary>private static void ConvertUrlToPdf(){var converter = new BasicConverter(new PdfTools());// 绑定转换过程中处理事件日志
            converter.PhaseChanged += Converter_PhaseChanged;
            converter.ProgressChanged += Converter_ProgressChanged;
            converter.Finished += Converter_Finished;
            converter.Warning += Converter_Warning;
            converter.Error += Converter_Error;// pdf 样式设置var doc = new HtmlToPdfDocument(){
                GlobalSettings = {
                    PaperSize = PaperKind.A3, // 纸张类型
                    Orientation = Orientation.Landscape,},// 支持多个网址
                Objects = {new ObjectSettings(){
                        Page = "http://baidu.com/",},new ObjectSettings(){
                        Page = "https://www.163.com/dy/article/HJVSIG920511DTU9.html?clickfrom=w_yw_zgzz",}}};// 转换为二进制byte[] pdf = converter.Convert(doc);// 判断目录是否存在，不存在则创建if (!Directory.Exists("FilesHtml")){
                Directory.CreateDirectory("FilesHtml");}// 文件保存using (var stream = new FileStream(Path.Combine("FilesHtml", DateTime.UtcNow.Ticks.ToString() + ".pdf"), FileMode.Create)){
                stream.Write(pdf, 0, pdf.Length);}}/// <summary>/// 转换产生错误日志输出/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private static void Converter_Error(object sender, WkHtmlToPdfDotNet.EventDefinitions.ErrorArgs e){
            Console.WriteLine("[转换错误] {0}", e.Message);}/// <summary>/// 转换产生警告日志输出/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private static void Converter_Warning(object sender, WkHtmlToPdfDotNet.EventDefinitions.WarningArgs e){
            Console.WriteLine("[警告] {0}", e.Message);}/// <summary>/// 转转完成日志输出/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private static void Converter_Finished(object sender, WkHtmlToPdfDotNet.EventDefinitions.FinishedArgs e){
            Console.WriteLine("转换 {0} ", e.Success ? "成功" : "失败");}/// <summary>/// 转换进度日志输出/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private static void Converter_ProgressChanged(object sender, WkHtmlToPdfDotNet.EventDefinitions.ProgressChangedArgs e){
            Console.WriteLine("转换进度 {0}", e.Description);}/// <summary>/// 转换阶段日志输入/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private static void Converter_PhaseChanged(object sender, WkHtmlToPdfDotNet.EventDefinitions.PhaseChangedArgs e){
            Console.WriteLine("阶段进度 {0} - {1}", e.CurrentPhase, e.Description);}}
}