asp.net ʵÏÖexcelµ¼Èëµ½Êý¾Ý¿â

//ExcelÅúÁ¿µ¼Èëµ½Êý¾Ý¿â
      protected void btnUpload_Click(object sender, EventArgs e)
      {   
         string IsXls = System.IO.Path.GetExtension(UploadExcel.FileName.ToString().ToLower());
         if (IsXls != ".xls")
         {
             Page.ClientScript.RegisterStartupScript(Page.GetType(), "", "<script type='text/javascript' language='javascript'>alert('Ö»¿ÉÒÔÑ¡ÔñExcelÎļþ');location.href='EmployeeAddPage.aspx';</script>");
               return;//µ±Ñ¡ÔñµÄ²»ÊÇExcelÎļþʱ,·µ»Ø
         }
          string filePath = UploadExcel.PostedFile.FileName;
          string fileName = UploadExcel.FileName;
          DataSet ds = ExecleDs (filePath,fileName);
          CommonLayer.employeeModel model = new CommonLayer.employeeModel();
          DataAcessLayer.employee_infomation addlist = new DataAcessLayer.employee_infomation();
          if (ds.Tables[0].Rows.Count > 0)
          {
              int row = ds.Tables[0].Rows.Count-1;
              for (int i = 0; i < ds.Tables[0].Select().Length; i++)
              {
          &