就是做个备份，拿的是试用版的 Aspose

1.         /// <summary>
2.         /// Aspose office （Excel,Word,PPT）,PDF 在线预览
3.         /// </summary>
4.         /// <param name="sourceDoc">需要预览的文件地址</param>
5.         /// <param name="saveDoc">展示的html文件地址</param>
6.         public void Goto(string sourceDoc, string saveDoc)
7.         {
8.             string s_sourceDoc = Server.MapPath(sourceDoc);
9.    
10.             string s_saveDoc = Server.MapPath(saveDoc);
11.    
12.             string docExtendName = Path.GetExtension(s_sourceDoc).ToLower();
13.    
14.             switch (docExtendName)
15.             {
16.                 case ".doc":
17.                 case ".docx":
18.                     Aspose.Words.Document doc = new Aspose.Words.Document(s_sourceDoc);
19.                     doc.Save(s_saveDoc, Aspose.Words.SaveFormat.Html);
20.                     Response.Redirect(saveDoc);
21.                     break;
22.                 case ".xls":
23.                 case ".xlsx":
24.                     Aspose.Cells.Workbook workbook = new Aspose.Cells.Workbook(s_sourceDoc);
25.                     workbook.Save(s_saveDoc, Aspose.Cells.SaveFormat.Html);
26.                     Response.Redirect(saveDoc);
27.                     break;
28.                 case ".ppt":
29.                 case ".pptx":
30.                     Aspose.Slides.Pptx.PresentationEx pres = new Aspose.Slides.Pptx.PresentationEx(s_sourceDoc);
31.                     pres.Save(s_saveDoc, Aspose.Slides.Export.SaveFormat.Html);
32.                     Response.Redirect(saveDoc);
33.                     break;
34.                 case ".pdf":
35.                     Aspose.Pdf.Document pdf = new Aspose.Pdf.Document(s_sourceDoc);
36.                     pdf.Save(s_saveDoc, Aspose.Pdf.SaveFormat.Html);
37.                     Response.Redirect(saveDoc);
38.                     break;
39.             }
40.         }

  http://download.csdn.net/detail/hou3125378/9909973 

Aspose office （Excel,Word,PPT）,PDF 在线预览