FlexPaper+SWFTool+操作类=在线预览PDF

引言

由于客户有在线预览PDF格式的需求，在网上找了一下解决方案，觉得FlexPaper用起来还是挺方便的，flexpaper是将pdf转换为swf格式的文件预览的，所以flexpaper一般和swftool配合使用，在程序运行时将pdf文件转换为swf格式的文件。

如果flexpaper不满足你的要求，也可以对其进行二次开发，这里推荐两篇文章，希望对您有所帮助：

http://www.cnblogs.com/xcong/archive/2013/06/20/3142155.html

http://www.cnblogs.com/zamlove/archive/2013/05/07/3065079.html

如何使用flexpaper

测试demo项目结构如图

使用的页面代码：

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 <!-- saved from url=(0014)about:internet -->

 <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">

 <head>

     <title></title>

     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

     <style type="text/css" media="screen">

         html, body {

             height: 100%;

         }

         body {

             margin: 0;

             padding: 0;

             overflow: auto;

         }

         #flashContent {

             display: none;

         }

     </style>

     <!--首先引入相关的js文件-->

     <script type="text/javascript" src="js/swfobject/swfobject.js"></script>

     <script type="text/javascript" src="js/flexpaper_flash.js"></script>

     <!--配置-->

     <script type="text/javascript">

         <!-- For version detection, set to min. required Flash Player version, or 0 (or 0.0.0), for no version detection. -->

         var swfVersionStr = "10.0.0";

         <!-- To use express install, set to playerProductInstall.swf, otherwise the empty string. -->

         var xiSwfUrlStr = "playerProductInstall.swf";

         var flashvars = {

             SwfFile: escape("Paper.swf"),

             Scale: 0.6,

             ZoomTransition: "easeOut",

             ZoomTime: 0.5,

             ZoomInterval: 0.1,

             FitPageOnLoad: false,

             FitWidthOnLoad: true,

             PrintEnabled: true,

             FullScreenAsMaxWindow: false,

             ProgressiveLoading: true,

             PrintToolsVisible: true,

             ViewModeToolsVisible: true,

             ZoomToolsVisible: true,

             FullScreenVisible: true,

             NavToolsVisible: true,

             CursorToolsVisible: true,

             SearchToolsVisible: true,

             localeChain: "en_US"

         };

         var params = {

         }

         params.quality = "high";

         params.bgcolor = "#ffffff";

         params.allowscriptaccess = "sameDomain";

         params.allowfullscreen = "true";

         var attributes = {};

         attributes.id = "FlexPaperViewer";

         attributes.name = "FlexPaperViewer";

         swfobject.embedSWF(

             "FlexPaperViewer.swf", "flashContent",

             "650", "500",

             swfVersionStr, xiSwfUrlStr,

             flashvars, params, attributes);

         swfobject.createCSS("#flashContent", "display:block;text-align:left;");

     </script>

 </head>

 <body>

     <div style="position:absolute;left:10px;top:10px;">

         <div id="flashContent">

             <p>

                 To view this page ensure that Adobe Flash Player version

                 10.0.0 or greater is installed.

             </p>

             <script type="text/javascript">

                 var pageHost = ((document.location.protocol == "https:") ? "https://" : "http://");

                 document.write("<a href='http://www.adobe.com/go/getflashplayer'><img src='"

                                 + pageHost + "www.adobe.com/images/shared/download_buttons/get_flash_player.gif' alt='Get Adobe Flash player' /></a>");

             </script>

         </div>

         <div id="errNoDocument" style="padding-top:10px;">

             Can't see the document? Running FlexPaper from your local directory? Make sure you have added FlexPaper as trusted. You can do that at <a href="http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager04a.html#119065">Adobe's website</a>.

         </div>

     </div>

 </body>

 </html>

效果图

上面的工具栏：打印，全屏等功能可配置。

swftool工具

操作类（本类来自常用类库，从网上下载的，一搜一大把）

 using System.Web;

 using System.Text;

 public static class PSD2swfHelper

 {

     /// <summary>

     /// 转换所有的页，图片质量80%

     /// </summary>

     /// <param name="pdfPath">PDF文件地址</param>

     /// <param name="swfPath">生成后的SWF文件地址</param>

     public static bool PDF2SWF(string pdfPath, string swfPath)

     {

         return PDF2SWF(pdfPath, swfPath, , GetPageCount(HttpContext.Current.Server.MapPath(pdfPath)), );

     }

     /// <summary>

     /// 转换前N页，图片质量80%

     /// </summary>

     /// <param name="pdfPath">PDF文件地址</param>

     /// <param name="swfPath">生成后的SWF文件地址</param>

     /// <param name="page">页数</param>

     public static bool PDF2SWF(string pdfPath, string swfPath, int page)

     {

         return PDF2SWF(pdfPath, swfPath, , page, );

     }

     /// <summary>

     /// PDF格式转为SWF

     /// </summary>

     /// <param name="pdfPath">PDF文件地址</param>

     /// <param name="swfPath">生成后的SWF文件地址</param>

     /// <param name="beginpage">转换开始页</param>

     /// <param name="endpage">转换结束页</param>

     private static bool PDF2SWF(string pdfPath, string swfPath, int beginpage, int endpage, int photoQuality)

     {

         //swftool，首先先安装，然后将安装目录下的东西拷贝到tools目录下

         string exe = HttpContext.Current.Server.MapPath("~/Bin/tools/pdf2swf.exe");

         pdfPath = HttpContext.Current.Server.MapPath(pdfPath);

         swfPath = HttpContext.Current.Server.MapPath(swfPath);

         if (!System.IO.File.Exists(exe) || !System.IO.File.Exists(pdfPath) || System.IO.File.Exists(swfPath))

         {

             return false;

         }

         StringBuilder sb = new StringBuilder();

         sb.Append(" \"" + pdfPath + "\"");

         sb.Append(" -o \"" + swfPath + "\"");

         sb.Append(" -s flashversion=9");

         if (endpage > GetPageCount(pdfPath)) endpage = GetPageCount(pdfPath);

         sb.Append(" -p " + "\"" + beginpage + "" + "-" + endpage + "\"");

         sb.Append(" -j " + photoQuality);

         string Command = sb.ToString();

         System.Diagnostics.Process p = new System.Diagnostics.Process();

         p.StartInfo.FileName = exe;

         p.StartInfo.Arguments = Command;

         p.StartInfo.WorkingDirectory = HttpContext.Current.Server.MapPath("~/Bin/");

         p.StartInfo.UseShellExecute = false;

         p.StartInfo.RedirectStandardError = true;

         p.StartInfo.CreateNoWindow = false;

         p.Start();

         p.BeginErrorReadLine();

         p.WaitForExit();

         p.Close();

         p.Dispose();

         return true;

     }

     /// <summary>

     /// 返回页数

     /// </summary>

     /// <param name="pdfPath">PDF文件地址</param>

     private static int GetPageCount(string pdfPath)

     {

         byte[] buffer = System.IO.File.ReadAllBytes(pdfPath);

         int length = buffer.Length;

         if (buffer == null)

             return -;

         if (buffer.Length <= )

             return -;

         string pdfText = Encoding.Default.GetString(buffer);

         System.Text.RegularExpressions.Regex rx1 = new System.Text.RegularExpressions.Regex(@"/Type\s*/Page[^s]");

         System.Text.RegularExpressions.MatchCollection matches = rx1.Matches(pdfText);

         return matches.Count;

     }

 }

然后安装swftool工具，将安装后的目录中的文件拷贝到tools目录下，如图

test.asp.cs代码

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 using System.Web.UI;

 using System.Web.UI.WebControls;

 namespace Wolfy.FlexPaperDemo

 {

     public partial class Test : System.Web.UI.Page

     {

         protected void Page_Load(object sender, EventArgs e)

         {

             //这里需要虚拟路径

             PSD2swfHelper.PDF2SWF("PDFFile/王牌2_C#_控件查询手册.pdf", "SWFFile/王牌2_C#_控件查询手册.swf");

         }

     }

 }

结果

如何禁用右键中的打印，复制功能

如果pdf保密性强，不让别人复制，打印等该如何？在上面推荐的两篇文章中，他们对其进行了二次开发，禁用了这个功能。非常感谢，那么之后只需将FlexPaperViewer.swf替换就可以了。

原图

替换后的

说保密只是相对的，在互联网上，只要能看，别人想盗取还是很容易的事，大不了，一张一张的截图。

总结

互联网，没有绝对安全的，想安全就别放在互联网上显摆，只要想要，总会有办法的。有时候客户的需求真他妈的让人蛋疼。

demo下载：链接：链接：http://pan.baidu.com/s/1hqEpx5a 密码：gupg

swftools-2013-04-09-1007下载：链接：http://pan.baidu.com/s/1c0CvBDA 密码：v38r