NetCore實戰(zhàn)：基于Html生成Pdf文件案例講解
作者：郝光明
WkHtmlToPdfDotNet是基于本地 wkhtmltopdf封裝的.NET Core類庫，主要通過webkit引擎實現(xiàn)html頁面轉(zhuǎn)換為pdf文件。并且支持在Windows、Docker、Linux、MacOSX運行。
一、WkHtmlToPdfDotNet介紹
WkHtmlToPdfDotNet是基于本地 wkhtmltopdf封裝的.NET Core類庫，主要通過webkit引擎實現(xiàn)html頁面轉(zhuǎn)換為pdf文件。并且支持在Windows、Docker、Linux、MacOSX運行。
主要功能實現(xiàn)在線URL轉(zhuǎn)pdf文件或者html代碼直接轉(zhuǎn)換為pdf文件，并對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.NET Core控制臺程序。
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("階段進度 {0} - {1}", e.CurrentPhase, e.Description); }
}}
三、運行效果
基于在線url方式導(dǎo)出效果：
直接拼接html方式導(dǎo)出效果：
責任編輯：武曉燕
來源：
IT技術(shù)分享社區(qū)
