簡介
適用于.NET Framework和.NET Core的HTML至PDF轉換器
SelectPdf提供的在線html到pdf轉換器使用.NET的Select.Pdf庫中的html到pdf轉換器，用于.NET的SelectPdf SDK提供了創建新pdf檔案，加載現有檔案，合并現有pdf檔案，拆分pdf檔案，向新創建或現有pdf檔案添加元素的可能性，
用于.NET的Select.Pdf庫中的html到pdf轉換器可以在任何.NET應用程式中使用，從完整的網頁或原始html代碼生成pdf檔案，就像在線html到pdf轉換器一樣，該免費試用版包含可立即使用的示例，這些示例以Windows表單，ASP.NET，帶有Razor和ASPX引擎的ASP.NET MVC的C＃和VB.NET編碼，
實作
1、nuget 參考
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、呼叫
/// <summary>
/// 下載pdf
/// </summary>
public void Downpdf(string data)
{
var stream = new BQoolCommon.Helpers.File.WebToPdf().GetFileStreamByHtml(Gethtml(data));
Response.Clear();
//二進制流資料（如常見的檔案下載）
Response.ContentType = "application/octet-stream";
//通知瀏覽器下載檔案而不是打開
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();
}
那么如何獲取指定頁面的html 呢 傳入對應的model 獲得指定動態的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();
}
}
}
}
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標籤：.NET技术
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