直接奉上源代码，运行环境：Office2010，Project2010（如果需要），Visio2010（如果需要），.net framework2.0
using System;using Microsoft.Office.Core;namespace Office{ class Util { private Util() { } /// <summary> /// 把Word文件转换成为PDF格式文件 /// </summary> /// <param name="sourcePath">源文件路径</param> /// <param name="targetPath">目标文件路径</param> /// <returns>true=转换成功</returns> public static bool WordToPDF(string sourcePath, string targetPath) { bool result = false; Microsoft.Office.Interop.Word.WdExportFormat exportFormat = Microsoft.Office.Interop.Word.WdExportFormat.wdExportFormatPDF; Microsoft.Office.Interop.Word.ApplicationClass application = null; Microsoft.Office.Interop.Word.Document document = null; try { application = new Microsoft.Office.Interop.Word.ApplicationClass(); application.Visible = false; document = application.Documents.Open(sourcePath); document.SaveAs2(); document.ExportAsFixedFormat(targetPath, exportFormat); result = true; } catch (Exception e) { Console.WriteLine(e.Message); result = false; } finally { if (document != null) { document.Close(); document = null; } if (application != null) { application.Quit(); application = null; } GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); GC.WaitForPendingFinalizers(); } return result; } /// <summary> /// 把Microsoft.Office.Interop.Excel文件转换成PDF格式文件 /// </summary> /// <param name="sourcePath">源文件路径</param> /// <param name="targetPath">目标文件路径</param> /// <returns>true=转换成功</returns> public static bool ExcelToPDF(string sourcePath, string targetPath) { bool result = false; Microsoft.Office.Interop.Excel.XlFixedFormatType targetType = Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF; object missing = Type.Missing; Microsoft.Office.Interop.Excel.ApplicationClass application = null; Microsoft.Office.Interop.Excel.Workbook workBook = null; try { application = new Microsoft.Office.Interop.Excel.ApplicationClass(); application.Visible = false; workBook = application.Workbooks.Open(sourcePath); workBook.SaveAs(); workBook.ExportAsFixedFormat(targetType, targetPath); result = true; } catch (Exception e) { Console.WriteLine(e.Message); result = false; } finally { if (workBook != null) { workBook.Close(true, missing, missing); workBook = null; } if (application != null) { application.Quit(); application = null; } GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); GC.WaitForPendingFinalizers(); } return result; } /// <summary> /// 把PowerPoint文件转换成PDF格式文件 /// </summary> /// <param name="sourcePath">源文件路径</param> /// <param name="targetPath">目标文件路径</param> /// <returns>true=转换成功</returns> public static bool PowerPointToPDF(string sourcePath, string targetPath) { bool result; Microsoft.Office.Interop.PowerPoint.PpSaveAsFileType targetFileType = Microsoft.Office.Interop.PowerPoint.PpSaveAsFileType.ppSaveAsPDF; object missing = Type.Missing; Microsoft.Office.Interop.PowerPoint.ApplicationClass application = null; Microsoft.Office.Interop.PowerPoint.Presentation persentation = null; try { application = new Microsoft.Office.Interop.PowerPoint.ApplicationClass(); //application.Visible = MsoTriState.msoFalse; persentation = application.Presentations.Open(sourcePath, MsoTriState.msoTrue, MsoTriState.msoFalse, MsoTriState.msoFalse); persentation.SaveAs(targetPath, targetFileType, Microsoft.Office.Core.MsoTriState.msoTrue); result = true; } catch(Exception e) { Console.WriteLine(e.Message); result = false; } finally { if (persentation != null) { persentation.Close(); persentation = null; } if (application != null) { application.Quit(); application = null; } GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); GC.WaitForPendingFinalizers(); } return result; } /// <summary> /// 把Visio文件转换成PDF格式文件 /// </summary> /// <param name="sourcePath">源文件路径</param> /// <param name="targetPath">目标文件路径</param> /// <returns>true=转换成功</returns> public static bool VisioToPDF(string sourcePath, string targetPath) { bool result; Microsoft.Office.Interop.Visio.VisFixedFormatTypes targetType = Microsoft.Office.Interop.Visio.VisFixedFormatTypes.visFixedFormatPDF; object missing = Type.Missing; Microsoft.Office.Interop.Visio.ApplicationClass application = null; Microsoft.Office.Interop.Visio.Document document = null; try { application = new Microsoft.Office.Interop.Visio.ApplicationClass(); application.Visible = false; document = application.Documents.Open(sourcePath); document.Save(); document.ExportAsFixedFormat(targetType, targetPath, Microsoft.Office.Interop.Visio.VisDocExIntent.visDocExIntentScreen, Microsoft.Office.Interop.Visio.VisPrintOutRange.visPrintAll); result = true; } catch (Exception e) { Console.WriteLine(e.Message); result = false; } finally { if (application != null) { application.Quit(); application = null; } GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); GC.WaitForPendingFinalizers(); } return result; } /// <summary> /// 把Project文件转换成PDF格式文件 /// </summary> /// <param name="sourcePath">源文件路径</param> /// <param name="targetPath">目标文件路径</param> /// <returns>true=转换成功</returns> public static bool ProjectToPDF(string sourcePath, string targetPath) { bool result; object missing = Type.Missing; Microsoft.Office.Interop.MSProject.ApplicationClass application = null; try { application = new Microsoft.Office.Interop.MSProject.ApplicationClass(); application.Visible = false; application.FileOpenEx(sourcePath); application.DocumentExport(targetPath,Microsoft.Office.Interop.MSProject.PjDocExportType.pjPDF); result = true; } catch (Exception e) { Console.WriteLine(e.Message); result = false; } finally { if (application != null) { application.DocClose(); application.Quit(); application = null; } GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); GC.WaitForPendingFinalizers(); } return result; } }}如果需要将Publish等其他文档进行转码，或者将文档转为其他格式（如xps），参照以上代码就可以了。原理其实很简单，比如说word2010，只要点击另存为，就会出现很多格式供你选择，这里正是调用了此接口。
尝试过使用Apache的OpenOffice进行转码，Word、Execel、Ppt勉强还可以转换（没有复杂图形），但效果也不好，其他的文档类型，OpenOffice根本无能为力，后来为了简单起见，就使用了原生态的Office接口。
转码的用途（好处）：可以在浏览器直接预览文档（由于项目组文档共享的需要，于是就开发了这么个玩意，配合WebServer，在文件上传后就立即进行转码，以后点击该文档，就返回转码后的文档，浏览器就可以直接浏览，很方便~）
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小小总结一下
采用C#的好处：100%完美转码，Perfect！不足：只能部署在windows服务器~
采用OpenOffice的好处：跨平台。不足：转码效果不理想~
提醒
以上是核心代码，在调用过程中，可能会出现以下问题导致转码失败：
1.文档被占用，解决方法：在转码前先复制一份，然后对副本进行转码~
2.文档损坏，解决方法：修复后再转~
3.文档带有密码，解决方法：未尝试~
4.……
要保证转码的成功率，还需要大量的调试和改进~
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