如何用FileUpload将execl数据导入到数据库里面

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OracleClient;
using System.Data.OleDb;
public partial class System_CompanyForm : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
  string MyForbidString = "";
  if (Session["MyForbid"] != null)
  {
  MyForbidString = Session["MyForbid"].ToString();
  }
  if (MyForbidString.IndexOf("E2") > 1)
  {
  Server.Transfer("~/SystemManage/AllErrorHelp.aspx");
  }
  }

  protected void btnUpload_Click(object sender, EventArgs e)
  {
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