NetCore實(shí)戰(zhàn)：基于Html生成Pdf文件案例講解

作者：郝光明 2022-11-23 07:30:11

WkHtmlToPdfDotNet是基于本地 wkhtmltopdf封裝的.NET Core類庫，主要通過webkit引擎實(shí)現(xiàn)html頁面轉(zhuǎn)換為pdf文件。并且支持在Windows、Docker、Linux、MacOSX運(yùn)行。

一、WkHtmlToPdfDotNet介紹

主要功能實(shí)現(xiàn)在線URL轉(zhuǎn)pdf文件或者h(yuǎn)tml代碼直接轉(zhuǎn)換為pdf文件，并對(duì)css樣式、圖片等很好的支持，導(dǎo)出的pdf文件和網(wǎng)站相差不大。

今天給大家通過實(shí)際的案例給大家介紹一下如何使用它，感興趣的朋友可以一起來學(xué)習(xí)一下！

官網(wǎng)：https://github.com/HakanL/WkHtmlToPdf-DotNet

二、安裝

1、使用Visual Studio 2019及以上版本創(chuàng)建一個(gè).NET Core控制臺(tái)程序。

2、安裝WkHtmlToPdfDotNet依賴包

命令方式安裝

工具→NuGet包管理器→程序包管理器控制包

安裝命令如下：

Install-Package Haukcode.WkHtmlToPdfDotNet

直接通過Nuget包搜索安裝

工具→NuGet包管理器→管理解決方案的NuGet程序包

3、實(shí)現(xiàn)代碼

using System;using System.IO;using WkHtmlToPdfDotNet;namespace HtmlToPdf{    class Program    {        // https://github.com/HakanL/WkHtmlToPdf-DotNet        // 安裝依賴包 Install-Package Haukcode.WkHtmlToPdfDotNet
static void Main(string[] args)        {            //ConvertHtmlToPdf();            ConvertUrlToPdf();        }        /// <summary>        /// 基于html導(dǎo)出pdf        /// </summary>private static void ConvertHtmlToPdf()        {                        var converter = new BasicConverter(new PdfTools());            // 綁定轉(zhuǎn)換過程中處理事件日志            converter.PhaseChanged += Converter_PhaseChanged;            converter.ProgressChanged += Converter_ProgressChanged;            converter.Finished += Converter_Finished;            converter.Warning += Converter_Warning;            converter.Error += Converter_Error;            // pdf 樣式設(shè)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>測(cè)試</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]" }                    }                }            };            // 轉(zhuǎn)換為二進(jìn)制            byte[] pdf = converter.Convert(doc);            // 判斷目錄是否存在，不存在則創(chuàng)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導(dǎo)出pdf        /// </summary>private static void ConvertUrlToPdf()        {
            var converter = new BasicConverter(new PdfTools());            // 綁定轉(zhuǎn)換過程中處理事件日志            converter.PhaseChanged += Converter_PhaseChanged;            converter.ProgressChanged += Converter_ProgressChanged;            converter.Finished += Converter_Finished;            converter.Warning += Converter_Warning;            converter.Error += Converter_Error;            // pdf 樣式設(shè)置            var doc = new HtmlToPdfDocument()            {                GlobalSettings = {                    PaperSize = PaperKind.A3, // 紙張類型                    Orientation = Orientation.Landscape,                },                // 支持多個(gè)網(wǎng)址                Objects = {                    new ObjectSettings()                    {                        Page = "http://baidu.com/",                    },                     new ObjectSettings()                    {                        Page = "https://www.163.com/dy/article/HJVSIG920511DTU9.html?clickfrom=w_yw_zgzz",
                    }                }            };
            // 轉(zhuǎn)換為二進(jìn)制            byte[] pdf = converter.Convert(doc);            // 判斷目錄是否存在，不存在則創(chuàng)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>        /// 轉(zhuǎn)換產(chǎn)生錯(cuò)誤日志輸出        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>private static void Converter_Error(object sender, WkHtmlToPdfDotNet.EventDefinitions.ErrorArgs e)        {            Console.WriteLine("[轉(zhuǎn)換錯(cuò)誤] {0}", e.Message);        }        /// <summary>        /// 轉(zhuǎn)換產(chǎn)生警告日志輸出        /// </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>        /// 轉(zhuǎn)轉(zhuǎn)完成日志輸出        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>private static void Converter_Finished(object sender, WkHtmlToPdfDotNet.EventDefinitions.FinishedArgs e)        {            Console.WriteLine("轉(zhuǎn)換 {0} ", e.Success ? "成功" : "失敗");        }        /// <summary>        /// 轉(zhuǎn)換進(jìn)度日志輸出        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>private static void Converter_ProgressChanged(object sender, WkHtmlToPdfDotNet.EventDefinitions.ProgressChangedArgs e)        {            Console.WriteLine("轉(zhuǎn)換進(jìn)度 {0}", e.Description);        }        /// <summary>        /// 轉(zhuǎn)換階段日志輸入        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>private static void Converter_PhaseChanged(object sender, WkHtmlToPdfDotNet.EventDefinitions.PhaseChangedArgs e)        {            Console.WriteLine("階段進(jìn)度 {0} - {1}", e.CurrentPhase, e.Description);        }

    }}

三、運(yùn)行效果

基于在線url方式導(dǎo)出效果：

直接拼接html方式導(dǎo)出效果：

責(zé)任編輯：武曉燕來源： IT技術(shù)分享社區(qū)

webkit 頁面 pdf