FlexPaper+SWFTool+操作类=在线预览PDF
原文:
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(@"/Type\s*/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：http://pan.baidu.com/s/1sjnSsyx 密码：jjbx
swftools-2013-04-09-1007下载：http://pan.baidu.com/s/1jGI8H4U