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

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

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）