概述
.NET的SelectPdf Html到Pdf转换器-社区版是.NET的SelectPdf库中提供的功能强大的html到pdf转换器的免费版本。
转换器提供了许多强大的选项(将任何网页转换为pdf,将任何html字符串转换为pdf,html5 / css3 / javascript支持,页眉和页脚支持等),唯一的限制是它最多可以生成pdf文档。5页长。
.NET的免费HTML至Pdf转换器–社区版功能:最多生成5页pdf文档,将任何网页转换为pdf,将任何原始html字符串转换为pdf,设置pdf页面设置(页面大小,页面方向,页面边距) ,在转换过程中调整内容大小以适合pdf页面,设置pdf文档属性,设置pdf查看器首选项,设置pdf安全性(密码,权限),设置转换延迟和网页导航超时,自定义页眉和页脚,在页眉中支持html和页脚,自动和手动分页符,在每个页面上重复html表头,支持@media类型屏幕和打印,支持内部和外部链接,基于html元素自动生成书签,支持HTTP标头,支持HTTP cookie,支持需要身份验证的网页,支持代理服务器,启用/禁用javascript,修改颜色空间,多线程支持,HTML5 / CSS3支持,Web字体支持等等。
代码实现
1、nuget 引用
Install-Package Select.HtmlToPdf
2、方法
using SelectPdf;
using System.Collections.Specialized;
using System.IO;
using System.Web;namespace BQoolCommon.Helpers.File
{public class WebToPdf{public WebToPdf(){//SelectPdf.GlobalProperties.LicenseKey = "your-license-key";}/// <summary>/// 將 Html 轉成 PDF,並儲存成檔案/// </summary>/// <param name="html">html</param>/// <param name="fileName">絕對路徑</param>public void SaveToFileByHtml(string html, string fileName){var doc = SetPdfDocument(html);doc.Save(fileName);}/// <summary>/// 傳入 Url 轉成 PDF,並儲存成檔案/// </summary>/// <param name="url">url</param>/// <param name="fileName">絕對路徑</param>/// <param name="httpCookies">Cookies</param>public void SaveToFileByUrl(string url, string fileName, NameValueCollection httpCookies){var doc = SetPdfDocument(url, httpCookies);doc.Save(fileName);}/// <summary>/// 將 Html 轉成 PDF,並輸出成 byte[] 格式/// </summary>/// <param name="html">html</param>/// <returns></returns>public byte[] GetFileByteByHtml(string html){var doc = SetPdfDocument(html);return doc.Save();}/// <summary>/// 傳入 Url 轉成 PDF,並輸出成 byte[] 格式/// </summary>/// <param name="url">url</param>/// <param name="httpCookies">Cookies</param>/// <returns></returns>public byte[] GetFileByteByUrl(string url, NameValueCollection httpCookies){var doc = SetPdfDocument(url, httpCookies);return doc.Save();}/// <summary>/// 將 Html 轉成 PDF,並輸出成 Stream 格式/// </summary>/// <param name="html">html</param>/// <returns></returns>public Stream GetFileStreamByHtml(string html){var doc = SetPdfDocument(html);var pdfStream = new MemoryStream();doc.Save(pdfStream);pdfStream.Position = 0;return pdfStream;}/// <summary>/// 傳入 Url 轉成 PDF,並輸出成 Stream 格式/// </summary>/// <param name="html">html</param>/// <returns></returns>public Stream GetFileStreamByUrl(string url, NameValueCollection httpCookies){var doc = SetPdfDocument(url, httpCookies);var pdfStream = new MemoryStream();doc.Save(pdfStream);pdfStream.Position = 0;return pdfStream;}private PdfDocument SetPdfDocument(string html){var converter = new HtmlToPdf();converter.Options.WebPageWidth = 1200;html = HttpUtility.HtmlDecode(html);return converter.ConvertHtmlString(html);}private PdfDocument SetPdfDocument(string url, NameValueCollection httpCookies){var converter = new HtmlToPdf();converter.Options.WebPageWidth = 1200;if (httpCookies != null && httpCookies.Count != 0){converter.Options.HttpCookies.Add(httpCookies);}return converter.ConvertUrl(url);}}
}
3、调用
/// <summary>/// 下载pdf/// </summary>public void Downpdf(string data){var stream = new BQoolCommon.Helpers.File.WebToPdf().GetFileStreamByHtml(Gethtml(data));Response.Clear();//二进制流数据(如常见的文件下载)Response.ContentType = "application/octet-stream";//通知浏览器下载文件而不是打开Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode("Profit and Loss Statement.pdf", System.Text.Encoding.UTF8));var bytes = StreamToBytes(stream);Response.BinaryWrite(bytes);Response.Flush();stream.Close();stream.Dispose();Response.End();}
那么如何获取指定页面的html 呢 传入对应的model 获得指定动态的html
private string Gethtml(string data){string str = "";str = this.ControllerContext.RenderViewToString("ProfitDetails", data);return str;}
using BQoolCommon.Helpers.Format;
using Newtonsoft.Json;
using OrdersManager.Models.ViewModel.Report;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;namespace OrdersManager.Web.Infrastructure
{public static class HelperExtensions{public static string RenderViewToString(this ControllerContext context, string viewName, string data){if (string.IsNullOrEmpty(viewName))viewName = context.RouteData.GetRequiredString("action");context.Controller.ViewData.Model = JsonConvert.DeserializeObject<ProfitDetailsmodel>(StringTools.Base64Decode(StringTools.Base64Decode(data)));using (var sw = new StringWriter()){ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(context, viewName);var viewContext = new ViewContext(context,viewResult.View,context.Controller.ViewData,context.Controller.TempData,sw);try{viewResult.View.Render(viewContext, sw);}catch (Exception ex){throw;}return sw.GetStringBuilder().ToString();}}}
}
参考文档
https://www.nuget.org/packages/Select.HtmlToPdf/