在线预览Office文件【效果类似百度文库】（转载）

转载地址：http://www.cnblogs.com/sword-successful/p/4031823.html

引言 

       结合上个项目和目前做的这个项目，其中都用到了Office文件在线预览，目前项目中是用到公司购买的Ntko控件，该控件每次浏览文件时则会提示安装信任插件，很繁琐，而且浏览效果不好。 提到Office文件在线预览，那么效果最好的应该就是百度文库的效果了，所以今天就忙里偷闲自己搞了下。

用到知识点

   1、Office文件转化为Pdf文件。直接用.Net类库：Microsoft.Office.Interop.Excel、Microsoft.Office.Interop.Powerpoint、Microsoft.Office.Interop.Word、Office。 我本机装的office2013,所以我选择的是12.0的。

   2、使用SwfTools将Pdf文件转化为Swf文件。

   3、使用众所周知的FlexPaper浏览Swf文件(预览时有水印，不知道怎么去掉)。

Demo过程中遇到的问题

   1、提示："无法嵌入互操作类型Microsoft.Office.Interop.Word.ApplicationClass,请改用使用的接口"

        解决：右键Dll,嵌入互操作类型改为false即可。

   2、用到MsoTriState.msoTrue枚举类型参数时需要饮用Office.dll。 我一开始就没引用这个文件。

   3、生成Swf文件时需要传入完整的路径，我一开始只传入了路径，没有swf文件名，试了几次没成功。

效果图

转化代码

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public class OfficeHelper     {         /// <summary>         /// Word to Pdf         /// </summary>         /// <param name="srcFilePath"></param>         /// <param name="targetFilePath"></param>         /// <returns></returns>         public static bool WordToPdf(string srcFilePath, string targetFilePath)         {             bool rs = 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(srcFilePath);                 document.SaveAs();                 document.ExportAsFixedFormat(targetFilePath, exportFormat);                   rs = true;             }             catch (Exception)             {                 rs = false;                 throw;             }             finally             {                 if (document != null)                 {                     document.Close();                     document = null;                 }                   if (application != null)                 {                     application.Quit();                     application = null;                 }                   GC.Collect();                 GC.WaitForPendingFinalizers();             }               return rs;         }           /// <summary>         /// Excel To Pdf         /// </summary>         /// <param name="srcFilePath"></param>         /// <param name="targetFilePath"></param>         /// <returns></returns>         public static bool ExcelToPdf(string srcFilePath, string targetFilePath)         {             bool rs = false;             Microsoft.Office.Interop.Excel.XlFixedFormatType exportFormat = Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF;             Microsoft.Office.Interop.Excel.ApplicationClass application = null;               Microsoft.Office.Interop.Excel.Workbook document = null;               try             {                 application = new Microsoft.Office.Interop.Excel.ApplicationClass();                 application.Visible = false;                 document = application.Workbooks.Open(srcFilePath);                 document.SaveAs();                 document.ExportAsFixedFormat(exportFormat, targetFilePath);                   rs = true;             }             catch (Exception)             {                 rs = false;                 throw;             }             finally             {                 if (document != null)                 {                     document.Close();                     document = null;                 }                   if (application != null)                 {                     application.Quit();                     application = null;                 }                   GC.Collect();                 GC.WaitForPendingFinalizers();             }               return rs;         }           /// <summary>         /// PPT To Pdf         /// </summary>         /// <param name="srcFilePath"></param>         /// <param name="targetFilePath"></param>         /// <returns></returns>         public static bool PptToPdf(string srcFilePath, string targetFilePath)         {             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();                   persentation = application.Presentations.Open(srcFilePath, MsoTriState.msoTrue, MsoTriState.msoFalse, MsoTriState.msoFalse);                 persentation.SaveAs(targetFilePath, 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>         /// Pdf To Swf         /// </summary>         /// <param name="swfTools">Swf转化工具路径</param>         /// <param name="srcFilePath"></param>         /// <param name="targetFilePath"></param>         /// <returns></returns>         public static bool PdfToSwf(string toolsPath, string cmd)         {             bool iss = false;//判断是否转换成功，默认失败             try             {                 using (Process p = new Process())                 {                     ProcessStartInfo psi = new ProcessStartInfo(toolsPath, cmd);                     p.StartInfo = psi;                     p.Start();                     p.WaitForExit();                     iss = true;//转换成功                 }             }             catch { }             return iss;         }     }

/// <summary>
        /// Pdf文件转化为Swf
        /// </summary>
        /// <param name="swfTools">转化工具路径</param>
        /// <param name="pdfPath">pdf文件目录</param>
        /// <param name="pdfFileName">pdf文件名</param>
        /// <param name="desPath">保存swf路径</param>
        /// <returns></returns>
        protected string PdfToSwf(string swfTools, string pdfPath, string pdfFileName, string desPath)
        {
            string fileFullName =Path.Combine(pdfPath,pdfFileName);
            string fileFullNameWithoutEx = Path.GetFileNameWithoutExtension(pdfFileName);
            string ext = Path.GetExtension(pdfFileName).ToLower();

            string saveSwfPath = desPath + fileFullNameWithoutEx + ".swf";
            string rs = fileFullNameWithoutEx + ".swf";
            
            string cmdStr = "  -t  "" + fileFullName + "" -s flashversion=9 -o "" + saveSwfPath + """;
            bool iss = OfficeHelper.PdfToSwf(swfTools, cmdStr);

            return rs;
        }


/// <summary>
        /// Office文件转pdf文件
        /// </summary>
        /// <param name="officePath">office文件保存路径</param>
        /// <param name="officeFileName">office文件名</param>
        /// <param name="pdfPath">保存pdf路径</param>
        protected string OfficeToPdf(string officePath, string officeFileName, string pdfPath)
        {
            string fullPathName = Path.Combine(officePath, officeFileName);
            string fileNameWithoutEx = Path.GetFileNameWithoutExtension(officeFileName);
            string ext = Path.GetExtension(officeFileName).ToLower();

            string savePdfPath = pdfPath + fileNameWithoutEx + ".pdf";
            string retValue = fileNameWithoutEx + ".pdf";

            switch (ext)
            {
                case ".doc":
                    OfficeHelper.WordToPdf(fullPathName, savePdfPath);
                    break;
                case ".docx":
                    OfficeHelper.WordToPdf(fullPathName, savePdfPath);
                    break;
                case ".xls":
                    OfficeHelper.ExcelToPdf(fullPathName, savePdfPath);
                    break;
                case ".xlsx":
                    OfficeHelper.ExcelToPdf(fullPathName, savePdfPath);
                    break;
                case ".ppt":
                    OfficeHelper.PptToPdf(fullPathName, savePdfPath);
                    break;
                case ".pptx":
                    OfficeHelper.PptToPdf(fullPathName, savePdfPath);
                    break;
            }


            return retValue;
        }

参考

      在Demo的过程中，学习和参考了两位博友的文章，在此表示感谢

      Wolfy: http://www.cnblogs.com/wolf-sun/p/3569960.html

      静以修身:http://www.cnblogs.com/zzPrince/p/3378336.html

      源代码：http://yunpan.cn/cAhzwWhy5bgVD （提取码：7900）