C#如何将excel的数据导入到SQL2005数据库中

public DataSet ExecleDs(string filenameurl, string table)
    {
       
        string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + filenameurl + ";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'";
        OleDbConnection conn = new OleDbConnection(strConn);
        conn.Open();
        DataSet ds = new DataSet();
        OleDbDataAdapter odda = new OleDbDataAdapter("select * from [Sheet1$]", conn);
        odda.Fill(ds, table);
        return ds;
    }
    protected void Button8_Click(object sender, EventArgs e)//确定添加键
    {
        string strConn = "Data Source=.;DataBase=gongnuan;Uid=sa;Pwd=sa";
        if (FileUpload1.HasFile == false)//HasFile用来检查FileUpload是否有指定文件
        {
            Response.Write("<script>alert('请您选择Excel文件')</script> ");
            return;//当无文件时,返回
        }
        string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名
        if (IsXls != ".xls")
        {
            Response.Write("<script>alert('只可以选择Excel文件')</script>");
            return;//当选择的不是Excel文件时,返回
        }
        SqlConnection cn = new SqlConnection(strConn);
        cn.Open();
        string filename = FileUpload1.FileName;              //获取Execle文件名  DateTime日期函数
        string savePath = Server.MapPath(("~\\upfiles\\") + filename);//Server.MapPath 获得虚拟服务器相对路径
        FileUpload1.SaveAs(savePath);                        //SaveAs 将上传的文件内容保存在服务器上
        DataSet ds = ExecleDs(savePath, filename);           //调用自定义方法
        DataRow[] dr = ds.Tables[0].Select();            //定义一个DataRow数组
        int rowsnum = ds.Tables[0].Rows.Count;
        if (rowsnum == 0)
        {
            Response.Write("<script>alert('Excel表为空表,无数据!')</script>");   //当Excel表为空时,对用户进行提示
        }
        else
        {
            for (int i = 0; i < dr.Length; i++)
            {
                string pininputdate = dr[i]["excel列名"].ToString();//日期 excel列名【名称不能变,否则就会出错】
               
                string insertstr = "insert语句";

                SqlCommand cmd = new SqlCommand(insertstr, cn);
                try
                {
                    cmd.ExecuteNonQuery();
                }
                catch (MembershipCreateUserException ex)       //捕捉异常
                {
                    Response.Write("<script>alert('导入内容:" + ex.Message + "')</script>");
                }

            }
            Response.Write("<script>alert('Excle表导入成功!');location='default.aspx'</script>");
        }
        cn.Close();
       
    }