public DataSet GetDataSet(string filePath)
{
  string Connstr = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + filePath + "';Extended Properties='Excel 8.0;HDR=Yes;IMEX=1'");
  OleDbConnection Conn = new OleDbConnection(Connstr);
  //创建ArrayList对象 存放所有sheetname 
  ArrayList sheetNamelist = new ArrayList();
  //获取配置Excel中sheet总数(这里是根据项目需求配置的) 如果需要导入Excel表格所有sheet数据则将此代码删除
  int sheetCount = Convert.ToInt32(ConfigurationManager.AppSettings["sheetCount"].ToString());
  DataSet dsExcel = new DataSet();
  try
  {
   if (Conn.State == ConnectionState.Closed)
   {
    Conn.Open();
   }
   DataTable dtExcelSchema = Conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });
   string sheetName = string.Empty;
   if (dtExcelSchema.Rows.Count > sheetCount)
   {
    Page.RegisterStartupScript("", "<mce:script type="text/javascript"><!--
alert('很抱歉!你上传Excel文件sheet总数过多不能大于10个sheet..!! ')
// --></mce:script>");
    return;
   }
   else
   {
    for (int j = 0; j < dtExcelSchema.Rows.Count; j++)
    {
     sheetName = String.Format("Sheet{0}$", j + 1);
     sheetNamelist.Add(sheetName);
    }
   }
  }
  catch (Exception ex)
  {
   throw new Exception(ex.Message.ToString(), ex);
  }
  finally
  {
   Conn.Close();
  }
  try
  {
   string strSQL = string.Empty;
   for (int i = 0; i < sheetNamelist.Count; i++)
   {
    strSQL = "select * from [" + sheetNamelist[i].ToString() + "]";
    OleDbDataAdapter da = new OleDbDataAdapter(strSQL, Conn);
    DataTable dtExcel = new DataTable(sheetNamelist[i].ToString());
    da.Fill(dtExcel);
    dsExcel.Tables.Add(dtExcel);
   }
   return dsExcel;
  }
  catch (Exception ex)
  {
   throw new Exception(ex.Message.ToString(), ex);
  }
 }
 //从Excel 表中取出数据 将取出来的数据插入到数据库中
 public void InsertData(DataSet ds) {
   string strSQL=string.Empty;
   if (ds.Tables[0].Rows.Count > 0)
   {
    for (int j = 0; j < ds.Tables.Count; j++) 
    { 
    for(int i=0;i<ds.Tables[j].Rows.Count;i++)
    {
     DataRow dr=ds.Tables[j].Rows[i];
     //组名
     string groupname = dr["组名"].ToString().Trim();
     //联系人
     string contactName = dr["联系人"].ToString().Trim();
     //手机号码
     string mobile = dr["手机号码"].ToString().Trim();
     //公司名称
     string companyName = dr["公司名称"].ToString().Trim();
     //公办号码
     string officeNum = dr["办公号码"].ToString().Trim();
     //家庭号码
     string homeNum = dr["家庭号码"].ToString().Trim();
     //邮箱
     string Email = dr["邮 箱"].ToString().Trim();
     //联系地址
     string address = dr["联系地址"].ToString().Trim();
     //创建时间
     string createtime = dr["创建时间"].ToString().Trim();
     //性别
     string Sex = dr["性别"].ToString().Trim();
     //手机套餐类型
     string mobileType = dr["手机套餐类型"].ToString().Trim();
     //是否开通通信助理
     string isOpen = dr["是否开通通信助理"].ToString().Trim();
     //SQL 语句
     strSQL = "insert into msm_Excel(groupName,Mobile,Name,companyName,officeNum,homeNum,Emial,address,Createtime,Sex,mobileType,isOpen)values('" + groupname + "','" + mobile + "','" + contactName + "','" + companyName + "','" + officeNum + "','" + homeNum + "','" + Email + "','" + address + "','" + createtime + "','" + Sex + "','" + mobileType + "','" + isOpen + "')";
     try
     {
      int n = SQLHelper.SqlDataExecute(strSQL);
      if (n > 0)
      {
       Page.RegisterStartupScript("", "<mce:script type="text/javascript"><!--
alert('数据插入成功!')
// --></mce:script>");
       Label1.Text = "一共成功插入" + ds.Tables[j].Rows.Count.ToString() + "条数据";
      }
      else
      {
       Page.RegisterStartupScript("", "<mce:script type="text/javascript"><!--
alert('服务器繁忙！请稍候再试..!')
// --></mce:script>");
      }
     }
     catch (Exception ex)
     {
      throw ex;
     }
    }
   }    
  }
  else {
   Page.RegisterStartupScript("", "<mce:script type="text/javascript"><!--
alert('此Excel文件中无数据!!!')
// --></mce:script>");
  }
 }
//调用
//获取上传文件名
  string fileName = FileUpload1.FileName;
   //判断是否存在上传文件
  if (FileUpload1.PostedFile.FileName.Length == 0) {
   Page.RegisterStartupScript("", "<mce:script type="text/javascript"><!--
alert('请选择你要上传的Excel文件!!')
// --></mce:script>");
  }
   //判断上传的文件类型是否正确
  else if (!Path.GetExtension(FileUpload1.PostedFile.FileName).ToLower().Equals(".xls") && !Path.GetExtension(FileUpload1.PostedFile.FileName).ToLower().Equals(".xlsx"))
  {
   Page.RegisterStartupScript("", "<script>alert('很抱歉!你上传的文件类型不正确!只能上传Excel类型的文件!')</script.");
  }
  else
  {
   //获取上传的文件路径
   filePath = Server.MapPath("TxtFiles//") + DateTime.Now.ToString("yyyyMMddhhmmss") + fileName;
   this.FileUpload1.PostedFile.SaveAs(filePath);
   ds = GetDataSet(filePath);
   InsertData(ds);
  }