FlexPaper+SWFTool+操作類=線上預覽PDF
阿新 • • 發佈：2019-02-09
引言
由於客戶有線上預覽PDF格式的需求，在網上找了一下解決方案，覺得FlexPaper用起來還是挺方便的，flexpaper是將pdf轉換為swf格式的檔案預覽的，所以flexpaper一般和swftool配合使用，在程式執行時將pdf檔案轉換為swf格式的檔案。
如果flexpaper不滿足你的要求，也可以對其進行二次開發，這裡推薦兩篇文章，希望對您有所幫助：
如何使用flexpaper
測試demo專案結構如圖
使用的頁面程式碼：
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 <!--首先引入相關的js檔案--> 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>
效果圖
上面的工具欄：列印，全屏等功能可配置。
swftool工具
操作類（本類來自常用類庫，從網上下載的，一搜一大把）
1 using System.Web; 2 using System.Text; 3 4 public static class PSD2swfHelper 5 { 6 /// <summary> 7 /// 轉換所有的頁，圖片質量80% 8 /// </summary> 9 /// <param name="pdfPath">PDF檔案地址</param> 10 /// <param name="swfPath">生成後的SWF檔案地址</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 /// 轉換前N頁，圖片質量80% 18 /// </summary> 19 /// <param name="pdfPath">PDF檔案地址</param> 20 /// <param name="swfPath">生成後的SWF檔案地址</param> 21 /// <param name="page">頁數</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格式轉為SWF 29 /// </summary> 30 /// <param name="pdfPath">PDF檔案地址</param> 31 /// <param name="swfPath">生成後的SWF檔案地址</param> 32 /// <param name="beginpage">轉換開始頁</param> 33 /// <param name="endpage">轉換結束頁</param> 34 private static bool PDF2SWF(string pdfPath, string swfPath, int beginpage, int endpage, int photoQuality) 35 { 36 //swftool，首先先安裝，然後將安裝目錄下的東西拷貝到tools目錄下 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 /// 返回頁數 69 /// </summary> 70 /// <param name="pdfPath">PDF檔案地址</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 =