string chexing = drop_chexing.Text;
        string peizhi = drop_peizhi.Text;
        string yanse = drop_yanse.Text;
        string xuanzhuang = drop_xuanzhuang.Text;
        string vin = this.vin.Text;
        string fdj = this.fdj.Text;
        DateTime ck = Convert.ToDateTime(this.d11.Text);
        string ckd = this.ckd.Text;
        string xsd = this.xsd.Text;
        string dealer = drop_dealer.Text;
        string cklx = "aaa";
        OleDbConnection conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+Server.MapPath("deal.accdb"));
        string sql = "INSERT INTO ck VALUES  ('" + chexing + "','" + vin + "','" + fdj + "','" + yanse + "','" + peizhi + "','" + xuanzhuang + "'," + ck + "','" + ckd + "','" + xsd + "','" + dealer + "','" + cklx + "')";