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";
} ///
/// 將 Html 轉成 PDF,並儲存成檔案
///

/// html
/// 絕對路徑
public void SaveToFileByHtml(string html, string fileName)
{
var doc = SetPdfDocument(html);
doc.Save(fileName);
} ///
/// 傳入 Url 轉成 PDF,並儲存成檔案
///

/// url
/// 絕對路徑
/// Cookies
public void SaveToFileByUrl(string url, string fileName, NameValueCollection httpCookies)
{
var doc = SetPdfDocument(url, httpCookies);
doc.Save(fileName);
} ///
/// 將 Html 轉成 PDF,並輸出成 byte[] 格式
///

/// html
///
public byte[] GetFileByteByHtml(string html)
{
var doc = SetPdfDocument(html);
return doc.Save();
} ///
/// 傳入 Url 轉成 PDF,並輸出成 byte[] 格式
///

/// url
/// Cookies
///
public byte[] GetFileByteByUrl(string url, NameValueCollection httpCookies)
{
var doc = SetPdfDocument(url, httpCookies);
return doc.Save();
} ///
/// 將 Html 轉成 PDF,並輸出成 Stream 格式
///

/// html
///
public Stream GetFileStreamByHtml(string html)
{
var doc = SetPdfDocument(html);
var pdfStream = new MemoryStream(); doc.Save(pdfStream);
pdfStream.Position = 0; return pdfStream;
} ///
/// 傳入 Url 轉成 PDF,並輸出成 Stream 格式
///

/// html
///
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

/// 
/// 下载pdf
///

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(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();
}
}
}
}

  

利用SelectPdf插件将网页生成PDF的


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