C#.NET实现Word或Excel文件转为HTML文件

Word文件转html，返回相对路径

 private string GetPathByDocToHTML(string strFile)
     {
         if (string.IsNullOrEmpty(strFile))
         {
             return "";//没有文件
         }

         Microsoft.Office.Interop.Word.ApplicationClass word = new Microsoft.Office.Interop.Word.ApplicationClass();
         Type wordType = word.GetType();
         Microsoft.Office.Interop.Word.Documents docs = word.Documents;

         // 打开文件
         Type docsType = docs.GetType();

         object fileName = strFile;

         Microsoft.Office.Interop.Word.Document doc = (Microsoft.Office.Interop.Word.Document)docsType.InvokeMember("Open",
         System.Reflection.BindingFlags.InvokeMethod, null, docs, new Object[] { fileName, true, true });

         // 转换格式，另存为html
         Type docType = doc.GetType();
         //给文件重新起名
         string filename = System.DateTime.Now.Year.ToString() + System.DateTime.Now.Month.ToString() + System.DateTime.Now.Day.ToString() +
         System.DateTime.Now.Hour.ToString() + System.DateTime.Now.Minute.ToString() + System.DateTime.Now.Second.ToString();

         string strFileFolder = "../html/";
         DateTime dt = DateTime.Now;
         //以yyyymmdd形式生成子文件夹名
         string strFileSubFolder = dt.Year.ToString();
         strFileSubFolder += (dt.Month < ) ? ("" + dt.Month.ToString()) : dt.Month.ToString();
         strFileSubFolder += (dt.Day < ) ? ("" + dt.Day.ToString()) : dt.Day.ToString();
         string strFilePath = strFileFolder + strFileSubFolder + "/";
         // 判断指定目录下是否存在文件夹，如果不存在，则创建
         if (!Directory.Exists(Server.MapPath(strFilePath)))
         {
             // 创建up文件夹
             Directory.CreateDirectory(Server.MapPath(strFilePath));
         }

         //被转换的html文档保存的位置
         // HttpContext.Current.Server.MapPath("html" + strFileSubFolder + filename + ".html")
         string ConfigPath = Server.MapPath(strFilePath + filename + ".html");
         object saveFileName = ConfigPath;

         /*下面是Microsoft Word 9 Object Library的写法，如果是10，可能写成：
           * docType.InvokeMember("SaveAs", System.Reflection.BindingFlags.InvokeMethod,
           * null, doc, new object[]{saveFileName, Word.WdSaveFormat.wdFormatFilteredHTML});
           * 其它格式：
           * wdFormatHTML
           * wdFormatDocument
           * wdFormatDOSText
           * wdFormatDOSTextLineBreaks
           * wdFormatEncodedText
           * wdFormatRTF
           * wdFormatTemplate
           * wdFormatText
           * wdFormatTextLineBreaks
           * wdFormatUnicodeText
         */
         docType.InvokeMember("SaveAs", System.Reflection.BindingFlags.InvokeMethod,
         null, doc, new object[] { saveFileName, Microsoft.Office.Interop.Word.WdSaveFormat.wdFormatFilteredHTML });

         //docType.InvokeMember("SaveAs", System.Reflection.BindingFlags.InvokeMethod,
         //  null, doc, new object[] { saveFileName, Microsoft.Office.Interop.Word.WdSaveFormat.wdFormatFilteredHTML }); 

         //关闭文档
         docType.InvokeMember("Close", System.Reflection.BindingFlags.InvokeMethod,
         null, doc, new object[] { null, null, null });

         // 退出 Word
         wordType.InvokeMember("Quit", System.Reflection.BindingFlags.InvokeMethod, null, word, null);
         //转到新生成的页面
         //return ("/" + filename + ".html");

         //转化HTML页面统一编码格式
         TransHTMLEncoding(ConfigPath);

         return (strFilePath + filename + ".html");
     }

Excel文件转HTML，返回相对路径

 private string GetPathByXlsToHTML(string strFile)
     {
         if (string.IsNullOrEmpty(strFile))
         {
             return "";//没有文件
         }

         //实例化Excel
         Microsoft.Office.Interop.Excel.Application repExcel = new Microsoft.Office.Interop.Excel.Application();
         Microsoft.Office.Interop.Excel.Workbook workbook = null;
         Microsoft.Office.Interop.Excel.Worksheet worksheet = null;

         //打开文件，n.FullPath是文件路径
         workbook = repExcel.Application.Workbooks.Open(strFile, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
         worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[];

         //给文件重新起名
         string filename = System.DateTime.Now.Year.ToString() + System.DateTime.Now.Month.ToString() + System.DateTime.Now.Day.ToString() +
         System.DateTime.Now.Hour.ToString() + System.DateTime.Now.Minute.ToString() + System.DateTime.Now.Second.ToString();

         string strFileFolder = "../html/";
         DateTime dt = DateTime.Now;
         //以yyyymmdd形式生成子文件夹名
         string strFileSubFolder = dt.Year.ToString();
         strFileSubFolder += (dt.Month < ) ? ("" + dt.Month.ToString()) : dt.Month.ToString();
         strFileSubFolder += (dt.Day < ) ? ("" + dt.Day.ToString()) : dt.Day.ToString();
         string strFilePath = strFileFolder + strFileSubFolder + "/";
         // 判断指定目录下是否存在文件夹，如果不存在，则创建
         if (!Directory.Exists(Server.MapPath(strFilePath)))
         {
             // 创建up文件夹
             Directory.CreateDirectory(Server.MapPath(strFilePath));
         }
         string ConfigPath = Server.MapPath(strFilePath + filename + ".html");
         object savefilename = (object)ConfigPath;

         object ofmt = Microsoft.Office.Interop.Excel.XlFileFormat.xlHtml;
         //进行另存为操作
         workbook.SaveAs(savefilename, ofmt, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
         object osave = false;
         //逐步关闭所有使用的对象
         workbook.Close(osave, Type.Missing, Type.Missing);
         repExcel.Quit();
         System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
         worksheet = null;
         //垃圾回收
         GC.Collect();
         System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
         workbook = null;
         GC.Collect();
         System.Runtime.InteropServices.Marshal.ReleaseComObject(repExcel.Application.Workbooks);
         GC.Collect();
         System.Runtime.InteropServices.Marshal.ReleaseComObject(repExcel);
         repExcel = null;
         GC.Collect();
         //依据时间杀灭进程
         System.Diagnostics.Process[] process = System.Diagnostics.Process.GetProcessesByName("EXCEL");
         foreach (System.Diagnostics.Process p in process)
         {
             if (DateTime.Now.Second - p.StartTime.Second >  && DateTime.Now.Second - p.StartTime.Second < )
             {
                 p.Kill();
             }
         }

         return (strFilePath + filename + ".html");
     }

这里可能会遇到一个问题，由于转化为HTML文件的页面编码可能使得浏览器无法正确解读，所以需要转码，转换代码如下：

     private void TransHTMLEncoding(string strFilePath)
     {
         try
         {
             System.IO.StreamReader sr = new System.IO.StreamReader(strFilePath, Encoding.GetEncoding());
             string html = sr.ReadToEnd();
             sr.Close();
             html = System.Text.RegularExpressions.Regex.Replace(html, @"<meta[^>]*>", "<meta http-equiv=Content-Type content='text/html; charset=gb2312'>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
             System.IO.StreamWriter sw = new System.IO.StreamWriter(strFilePath, false, Encoding.Default);

             sw.Write(html);
             sw.Close();
         }
         catch (Exception ex)
         {
             Page.RegisterStartupScript("alt", "<script>alert('" + ex.Message + "')</script>");
         }
     }

这样就可以正常在页面上正常显示了