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）