office文档转pdf

这里贴下代码吧，没啥好说的。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Office.Core;
using Microsoft.Office;
using Word = Microsoft.Office.Interop.Word;

using Excel = Microsoft.Office.Interop.Excel;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;

namespace Common
{
    /// <summary>
    /// 将office文档转换为pdf
    /// </summary>
    public class OfficeToPdfUtils
    {
        /// <summary>
        /// 构造函数
        /// </summary>
        public OfficeToPdfUtils()
        {
            //   // TODO: 在此处添加构造函数逻辑   //
        }
        /// <summary>  /// Word转换成pdf   /// </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 bool DOCConvertToPDF(string sourcePath, string targetPath)
        {
            bool result = false;
            Word.WdExportFormat exportFormat = Word.WdExportFormat.wdExportFormatPDF;
            object paramMissing = Type.Missing;
            Word.ApplicationClass wordApplication = new Word.ApplicationClass();
            Word.Document wordDocument = null;
            try
            {
                object paramSourceDocPath = sourcePath;
                string paramExportFilePath = targetPath;
                Word.WdExportFormat paramExportFormat = exportFormat;
                bool paramOpenAfterExport = false;
                Word.WdExportOptimizeFor paramExportOptimizeFor = Word.WdExportOptimizeFor.wdExportOptimizeForPrint;
                Word.WdExportRange paramExportRange = Word.WdExportRange.wdExportAllDocument;
                int paramStartPage = ;
                int paramEndPage = ;
                Word.WdExportItem paramExportItem = Word.WdExportItem.wdExportDocumentContent;
                bool paramIncludeDocProps = true;
                bool paramKeepIRM = true;
                Word.WdExportCreateBookmarks paramCreateBookmarks = Word.WdExportCreateBookmarks.wdExportCreateWordBookmarks;
                bool paramDocStructureTags = true;
                bool paramBitmapMissingFonts = true;
                bool paramUseISO19005_1 = false;
                wordDocument = wordApplication.Documents.Open(
                    ref paramSourceDocPath, ref paramMissing, ref paramMissing,
                    ref paramMissing, ref paramMissing, ref paramMissing,
                    ref paramMissing, ref paramMissing, ref paramMissing,
                    ref paramMissing, ref paramMissing, ref paramMissing,
                    ref paramMissing, ref paramMissing, ref paramMissing,
                    ref paramMissing);
                if (wordDocument != null)
                    wordDocument.ExportAsFixedFormat(paramExportFilePath,
                        paramExportFormat, paramOpenAfterExport,
                        paramExportOptimizeFor, paramExportRange, paramStartPage,
                        paramEndPage, paramExportItem, paramIncludeDocProps,
                        paramKeepIRM, paramCreateBookmarks, paramDocStructureTags,
                        paramBitmapMissingFonts, paramUseISO19005_1,
                        ref paramMissing);
                result = true;
            }
            catch (Exception ex)
            {
                result = false;
                throw ex;

            }
            finally
            {
                if (wordDocument != null)
                {
                    wordDocument.Close(ref paramMissing, ref paramMissing, ref paramMissing);
                    wordDocument = null;
                }
                if (wordApplication != null)
                {
                    wordApplication.Quit(ref paramMissing, ref paramMissing, ref paramMissing);
                    wordApplication = null;
                }
                GC.Collect();
                GC.WaitForPendingFinalizers();
            }
            return result;
        }
        /// <summary>把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 bool XLSConvertToPDF(string sourcePath, string targetPath)
        {
            bool result = false;
            Microsoft.Office.Interop.Excel.XlFixedFormatType targetType = Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF;
            object missing = Type.Missing;
            Excel.ApplicationClass application = null;
            Excel.Workbook workBook = null;
            try
            {
                application = new Excel.ApplicationClass();
                object target = targetPath;
                object type = targetType;
                workBook = application.Workbooks.Open(sourcePath, missing, missing, missing, missing, missing,
                    missing, missing, missing, missing, missing, missing, missing, missing, missing);
                workBook.ExportAsFixedFormat(targetType, target,
                    Excel.XlFixedFormatQuality.xlQualityStandard, true, false, missing, missing, missing, missing);
                result = true;
            }
            catch (Exception ex)
            {
                result = false;
                throw ex;
            }
            finally
            {
                if (workBook != null)
                {
                    workBook.Close(true, missing, missing);
                    workBook = null;
                }
                if (application != null)
                {
                    application.Quit();
                    application = null;
                }
                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 bool PPTConvertToPDF(string sourcePath, string targetPath)
        {
            bool result;
            PowerPoint.PpSaveAsFileType targetFileType = PowerPoint.PpSaveAsFileType.ppSaveAsPDF;
            //object missing = Type.Missing;
            PowerPoint.ApplicationClass application = null;
            PowerPoint.Presentation persentation = null;
            try
            {
                application = new PowerPoint.ApplicationClass();
                persentation = application.Presentations.Open(sourcePath, MsoTriState.msoTrue
                    , MsoTriState.msoFalse, MsoTriState.msoFalse);
                persentation.SaveAs(targetPath
                        , targetFileType, Microsoft.Office.Core.MsoTriState.msoTrue);
                result = true;
            }
            catch (Exception ex)
            {
                result = false;
                throw ex;
            }
            finally
            {
                if (persentation != null)
                {
                    persentation.Close();
                    persentation = null;
                }
                if (application != null)
                {
                    application.Quit();
                    application = null;
                }
                GC.Collect();
                GC.WaitForPendingFinalizers();
            }
            return result;
        }
    }
}

因为涉及到pdf在线预览，这里别人的实现方法是把pdf转为swf,然后通过一个第三方pdf2swf.exe
来实现转换的。然后通过一个好像叫FlexPaper的东西打开查看的，我没有研究，就不说了，网上应该有，大家自己查阅下，我想在线预览的应该有很多方式。

如果下次有研究的话，会贴上来的。