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.WkHtmlToPdfDotNet
static 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);
}
}
}三、运行效果
基于在线url方式导出效果
直接拼接html方式导出效果
