- A+
所属分类：.NET技术
简介
适用于.NET Framework和.NET Core的HTML至PDF转换器
SelectPdf提供的在线html到pdf转换器使用.NET的Select.Pdf库中的html到pdf转换器。用于.NET的SelectPdf SDK提供了创建新pdf文档，加载现有文档，合并现有pdf文档，拆分pdf文档，向新创建或现有pdf文档添加元素的可能性。
用于.NET的Select.Pdf库中的html到pdf转换器可以在任何.NET应用程序中使用，从完整的网页或原始html代码生成pdf文档，就像在线html到pdf转换器一样。该免费试用版包含可立即使用的示例，这些示例以Windows窗体，ASP.NET，带有Razor和ASPX引擎的ASP.NET MVC的C＃和VB.NET编码。
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(); } } } }
