最近研究了半天，代码是倾情奉送啊，C#，asp.net的
这个原理是office文件转换为PDF文件，然后再转换成SWF文件，FlexPaper+swfTools。
有个问题，需要在web.config中加这么一行<identity impersonate="true" userName="administrator" password="你的服务器登录密码" />
/// <summary> /// 转换压缩文件，以便于预览（图片大小调整，office、pdf转成swf） /// </summary> /// <param name="sfilePath">真实文件路径（虚拟），含文件名，精确到网站根目录</param> /// <param name="sfileExtention">真实的文件扩展名，要判断如何转换</param> /// <param name="showWait">真是否显示提示等待转换信息，默认不提示</param> public static void FileConvert(string sfilePath, string sfileExtention, bool showWait = false) { string PfilePath = HttpContext.Current.Server.MapPath(Path.GetDirectoryName(sfilePath));//当前操作的物理路径 string PfileName = Path.GetFileName(sfilePath);// 当前操作的文件名 string PfileExtention = sfileExtention.ToLower();// 当前操作的文件扩展名 if (File.Exists(PfilePath + "\\swf\\" + PfileName + ".swf")) { return; } else { if (!Directory.Exists(PfilePath + "\\swf\\")) { Directory.CreateDirectory((PfilePath + "\\swf\\")); } try { switch (DocuType(PfileExtention)) { case TypeOfDocu.office: if (showWait) { System.Text.StringBuilder StrB = new System.Text.StringBuilder(185); StrB.Append("<div style='color: #0000CC; font-size: 14px;'>文档需转换格式，才可以在线预览。<br /><br />转换中，马上就好，请稍后……</div>"); StrB.Append("<div style='color:white;'>0000000000000000000000000000000000000000000000000您是第一个浏览的人</div>");//兼容IE256字符才显示，这里180就可以 HttpContext.Current.Response.Write(StrB.ToString()); HttpContext.Current.Response.Flush(); } //将office文件转换成PDF,保存到swf文件夹下 string pdfFileName = PfileName + ".pdf"; string fileOutPath = PfilePath + "\\swf\\" + pdfFileName; ExportPdf(PfilePath + "\\" + PfileName, fileOutPath, PfileExtention); //切记，使用pdf2swf.exe 打开的文件名之间不能有空格，否则会失败 string cmdStr = HttpContext.Current.Server.MapPath("~/SWF/pdf2swf.exe"); string savePath = PfilePath + "\\swf\\"; //string saveSWFPath = HttpContext.Current.Server.MapPath("~/SWF/"); //将PDF文件转换成SWF格式文件 string sourcePath = @"""" + savePath + pdfFileName + @"""";//要转换的pdf文件路径 string targetPath = @"""" + savePath + PfileName + ".swf" + @"""";//转换之后swf文件存放的目标路径 //@"""" 四个双引号得到一个双引号，如果你所存放的文件所在文件夹名有空格的话，要在文件名的路径前后加上双引号，才能够成功 // -t 源文件的路径 // -s 参数化（也就是为pdf2swf.exe 执行添加一些窗外的参数(可省略)） string argsStr = " -p 1-100 -t " + sourcePath + " -s flashversion=9 -o " + targetPath; //执行pdf到swf的转换 ExcutedCmd(cmdStr, argsStr); File.Delete(savePath + pdfFileName); break; case TypeOfDocu.pdf: cmdStr = HttpContext.Current.Server.MapPath("~/SWF/pdf2swf.exe"); sourcePath = @"""" + PfilePath + "\\" + PfileName + @""""; targetPath = @"""" + PfilePath + "\\swf\\" + PfileName + ".swf" + @""""; argsStr = " -p 1-100 -t " + sourcePath + " -s flashversion=9 -o " + targetPath; ExcutedCmd(cmdStr, argsStr); break; case TypeOfDocu.jpg: if (!Directory.Exists(PfilePath + "\\img\\")) { Directory.CreateDirectory((PfilePath + "\\img\\")); } ImageSize(900, 0, PfilePath + "\\" + PfileName, PfilePath + "\\img\\" + PfileName + ".jpg", false); break; } } catch (Exception ex) { throw ex; } } } private static void ExcutedCmd(string cmd, string args) { using (Process p = new Process()) { ProcessStartInfo psi = new ProcessStartInfo(cmd, args); psi.WindowStyle = ProcessWindowStyle.Hidden; p.StartInfo = psi; p.Start(); p.WaitForExit(); } } private static bool ExportPdf(string fileName, string outputFileName, string fileExt) { if (string.IsNullOrEmpty(fileName) || string.IsNullOrEmpty(outputFileName)) return false; if (!File.Exists(fileName)) return false; string formatExtension = Path.GetExtension(outputFileName); if (string.IsNullOrEmpty(fileExt) || string.IsNullOrEmpty(formatExtension)) return false; if (formatExtension != ".pdf") return false; switch (fileExt) { case "doc": case "docx": return WordExportAsPdf(fileName, outputFileName); case "xls": case "xlsx": return ExcelExportAsPdf(fileName, outputFileName); case "ppt": case "pptx": return PowerPointExportAsPdf(fileName, outputFileName); default: return false; } } /// <summary> /// 转换为pdf文件，适合（.doc、.docx、.mht、.htm文件类型） /// </summary> /// <param name="fileName"></param> /// <param name="outputFileName"></param> /// <returns></returns> private static bool WordExportAsPdf(string fileName, string outputFileName) { bool isSucceed = false; Word.WdExportFormat fileFormat = Microsoft.Office.Interop.Word.WdExportFormat.wdExportFormatPDF; Word._Application wordApp = null; if (wordApp == null) wordApp = new Word.Application(); Word._Document wordDoc = null; try { wordDoc = wordApp.Documents.Open(fileName); wordDoc.ExportAsFixedFormat(outputFileName, fileFormat); isSucceed = true; } finally { if (wordDoc != null) { wordDoc.Close(); wordDoc = null; } if (wordApp != null) { wordApp.Quit(); wordApp = null; } GC.Collect(); GC.WaitForPendingFinalizers(); } return isSucceed; } /// <summary> /// 转换为pdf文件，适合（.xls、.xlsx文件类型） /// </summary> /// <param name="fileName"></param> /// <param name="outputFileName"></param> /// <returns></returns> private static bool ExcelExportAsPdf(string fileName, string outputFileName) { bool isSucceed = false; Excel.XlFixedFormatType fileFormat = Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF; Excel.Application excelApp = null; if (excelApp == null) excelApp = new Excel.Application(); Excel.Workbook workBook = null; try { workBook = excelApp.Workbooks.Open(fileName); workBook.ExportAsFixedFormat(fileFormat, outputFileName); isSucceed = true; } finally { if (workBook != null) { workBook.Close(); workBook = null; } if (excelApp != null) { excelApp.Quit(); excelApp = null; } GC.Collect(); GC.WaitForPendingFinalizers(); KillExcel(); } return isSucceed; } /// <summary> /// EXCEL进程无法正常退出 /// </summary> private static void KillExcel() { Process[] pp = Process.GetProcessesByName("EXCEL"); foreach (Process p in pp) { if (p.SessionId == 0) { p.Kill(); } } } /// <summary> /// 转换为pdf文件，适合（.ppt、pptx文件类型） /// </summary> /// <param name="fileName"></param> /// <param name="outputFileName"></param> /// <returns></returns> private static bool PowerPointExportAsPdf(string fileName, string outputFileName) { bool isSucceed = false; PowerPoint.PpFixedFormatType fileFormat = PowerPoint.PpFixedFormatType.ppFixedFormatTypePDF; PowerPoint.Application pptxApp = null; if (pptxApp == null) pptxApp = new PowerPoint.Application(); PowerPoint.Presentation presentation = null; try { presentation = pptxApp.Presentations.Open(fileName, MsoTriState.msoTrue, MsoTriState.msoFalse, MsoTriState.msoFalse); presentation.ExportAsFixedFormat(outputFileName, fileFormat); isSucceed = true; } finally { if (presentation != null) { presentation.Close(); presentation = null; } if (pptxApp != null) { pptxApp.Quit(); pptxApp = null; } GC.Collect(); GC.WaitForPendingFinalizers(); } return isSucceed; }
这个东西在64位操作系统中通过，就是每次转换的时间很长，Excel没排版好，也乱打印成PDF。
还有一种是模仿网易邮箱的附件预览的。参考：http://www.officeweb365.com/docview.aspx，把office文档原版呈现，能把这个地址利用起来倒是挺好
