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  • 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：

     1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 2 <!-- saved from url=(0014)about:internet -->
 3 <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
 4 <head>
 5     <title></title>
 6     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 7     <style type="text/css" media="screen">
 8         html, body {
 9             height: 100%;
10         }
11 
12         body {
13             margin: 0;
14             padding: 0;
15             overflow: auto;
16         }
17 
18         #flashContent {
19             display: none;
20         }
21     </style>
22     <!--首先引入相关的js文件-->
23     <script type="text/javascript" src="js/swfobject/swfobject.js"></script>
24     <script type="text/javascript" src="js/flexpaper_flash.js"></script>
25     <!--配置-->
26     <script type="text/javascript">
27         <!-- For version detection, set to min. required Flash Player version, or 0 (or 0.0.0), for no version detection. -->
28         var swfVersionStr = "10.0.0";
29         <!-- To use express install, set to playerProductInstall.swf, otherwise the empty string. -->
30         var xiSwfUrlStr = "playerProductInstall.swf";
31 
32         var flashvars = {
33             SwfFile: escape("Paper.swf"),
34             Scale: 0.6,
35             ZoomTransition: "easeOut",
36             ZoomTime: 0.5,
37             ZoomInterval: 0.1,
38             FitPageOnLoad: false,
39             FitWidthOnLoad: true,
40             PrintEnabled: true,
41             FullScreenAsMaxWindow: false,
42             ProgressiveLoading: true,
43             PrintToolsVisible: true,
44             ViewModeToolsVisible: true,
45             ZoomToolsVisible: true,
46             FullScreenVisible: true,
47             NavToolsVisible: true,
48             CursorToolsVisible: true,
49             SearchToolsVisible: true,
50             localeChain: "en_US"
51         };
52         var params = {
53         }
54         params.quality = "high";
55         params.bgcolor = "#ffffff";
56         params.allowscriptaccess = "sameDomain";
57         params.allowfullscreen = "true";
58         var attributes = {};
59         attributes.id = "FlexPaperViewer";
60         attributes.name = "FlexPaperViewer";
61         swfobject.embedSWF(
62             "FlexPaperViewer.swf", "flashContent",
63             "650", "500",
64             swfVersionStr, xiSwfUrlStr,
65             flashvars, params, attributes);
66         swfobject.createCSS("#flashContent", "display:block;text-align:left;");
67     </script>
68 
69 </head>
70 <body>
71     <div style="position:absolute;left:10px;top:10px;">
72         <div id="flashContent">
73             <p>
74                 To view this page ensure that Adobe Flash Player version
75                 10.0.0 or greater is installed.
76             </p>
77             <script type="text/javascript">
78                 var pageHost = ((document.location.protocol == "https:") ? "https://" : "http://");
79                 document.write("<a href='http://www.adobe.com/go/getflashplayer'><img src='"
80                                 + pageHost + "www.adobe.com/images/shared/download_buttons/get_flash_player.gif' alt='Get Adobe Flash player' /></a>");
81             </script>
82         </div>
83         <div id="errNoDocument" style="padding-top:10px;">
84             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>.
85         </div>
86     </div>
87 </body>
88 </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）

     1 using System.Web;
 2 using System.Text;
 3 
 4 public static class PSD2swfHelper
 5 {
 6     /// <summary>
 7     /// 转换所有的页，图片质量80%
 8     /// </summary>
 9     /// <param name="pdfPath">PDF文件地址</param>
10     /// <param name="swfPath">生成后的SWF文件地址</param>
11     public static bool PDF2SWF(string pdfPath, string swfPath)
12     {
13         return PDF2SWF(pdfPath, swfPath, 1, GetPageCount(HttpContext.Current.Server.MapPath(pdfPath)), 80);
14     }
15 
16     /// <summary>
17     /// 转换前N页，图片质量80%
18     /// </summary>
19     /// <param name="pdfPath">PDF文件地址</param>
20     /// <param name="swfPath">生成后的SWF文件地址</param>
21     /// <param name="page">页数</param>
22     public static bool PDF2SWF(string pdfPath, string swfPath, int page)
23     {
24         return PDF2SWF(pdfPath, swfPath, 1, page, 80);
25     }
26 
27     /// <summary>
28     /// PDF格式转为SWF
29     /// </summary>
30     /// <param name="pdfPath">PDF文件地址</param>
31     /// <param name="swfPath">生成后的SWF文件地址</param>
32     /// <param name="beginpage">转换开始页</param>
33     /// <param name="endpage">转换结束页</param>
34     private static bool PDF2SWF(string pdfPath, string swfPath, int beginpage, int endpage, int photoQuality)
35     {
36         //swftool，首先先安装，然后将安装目录下的东西拷贝到tools目录下
37         string exe = HttpContext.Current.Server.MapPath("~/Bin/tools/pdf2swf.exe");
38         pdfPath = HttpContext.Current.Server.MapPath(pdfPath);
39         swfPath = HttpContext.Current.Server.MapPath(swfPath);
40         if (!System.IO.File.Exists(exe) || !System.IO.File.Exists(pdfPath) || System.IO.File.Exists(swfPath))
41         {
42             return false;
43         }
44         StringBuilder sb = new StringBuilder();
45         sb.Append(" "" + pdfPath + """);
46         sb.Append(" -o "" + swfPath + """);
47         sb.Append(" -s flashversion=9");
48         if (endpage > GetPageCount(pdfPath)) endpage = GetPageCount(pdfPath);
49         sb.Append(" -p " + """ + beginpage + "" + "-" + endpage + """);
50         sb.Append(" -j " + photoQuality);
51         string Command = sb.ToString();
52         System.Diagnostics.Process p = new System.Diagnostics.Process();
53         p.StartInfo.FileName = exe;
54         p.StartInfo.Arguments = Command;
55         p.StartInfo.WorkingDirectory = HttpContext.Current.Server.MapPath("~/Bin/");
56         p.StartInfo.UseShellExecute = false;
57         p.StartInfo.RedirectStandardError = true;
58         p.StartInfo.CreateNoWindow = false;
59         p.Start();
60         p.BeginErrorReadLine();
61         p.WaitForExit();
62         p.Close();
63         p.Dispose();
64         return true;
65     }
66 
67     /// <summary>
68     /// 返回页数
69     /// </summary>
70     /// <param name="pdfPath">PDF文件地址</param>
71     private static int GetPageCount(string pdfPath)
72     {
73         byte[] buffer = System.IO.File.ReadAllBytes(pdfPath);
74         int length = buffer.Length;
75         if (buffer == null)
76             return -1;
77         if (buffer.Length <= 0)
78             return -1;
79         string pdfText = Encoding.Default.GetString(buffer);
80         System.Text.RegularExpressions.Regex rx1 = new System.Text.RegularExpressions.Regex(@"/Types*/Page[^s]");
81         System.Text.RegularExpressions.MatchCollection matches = rx1.Matches(pdfText);
82         return matches.Count;
83     }
84 }

    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

     1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Web.UI;
 6 using System.Web.UI.WebControls;
 7 
 8 namespace Wolfy.FlexPaperDemo
 9 {
10     public partial class Test : System.Web.UI.Page
11     {
12         protected void Page_Load(object sender, EventArgs e)
13         {
14             //这里需要虚拟路径
15             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");
16         }
17     }
18 }

    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
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  • 原文地址：https://www.cnblogs.com/wolf-sun/p/3525437.html
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