ข้อมูลไม่ยอม update ลงตารางค่ะ ช่วยดูหน่อยนะคะ asp.net c#

protected void Button2_Click(object sender, EventArgs e)
        {
            int i;
            LNoFO.Text = "";
            LDocFO.Text = "";
            LSta.Text = "";
            LRe.Text = "";
            LSe.Text = "";
            for (i = 0; i <= GridFO11.Rows.Count - 1; i++)
            {

             
                HyperLink LDocFO2 = (HyperLink)GridFO11.Rows[i].FindControl("HF012");
                DropDownList DropDownList1 = (DropDownList)this.GridFO11.Rows[i].FindControl("DropDownList1");

                

                LNoFO.Text = LNoFO.Text + "<br>" + LNo00101.Text;
                LDocFO.Text = LDocFO.Text + "<br>" + LDocFO2.Text;
                LSta.Text = LSta.Text + "<br>" + DropDownList1.Text;
              


                // update ข้อมูล
                string StrConn3 = WebConfigurationManager.ConnectionStrings["connect"].ToString();
                SqlConnection Conn3 = new SqlConnection(StrConn3);
                System.Data.SqlClient.SqlCommand objCmd;
                Conn3.Open();
               string sqlProduct3;

               sqlProduct3 = "UPDATE tbDCusCardS SET" +
                     " status = '" + LSta.Text + "' " +   
                " WHERE  Docu ='"+ LDocFO.Text+"' and No ='"+LNoFO.Text+"' ";

                SqlDataAdapter da3 = new SqlDataAdapter(sqlProduct3, Conn3);
                objCmd = new System.Data.SqlClient.SqlCommand();
                objCmd.Connection = Conn3;
                objCmd.CommandType = CommandType.Text;
                objCmd.CommandText = sqlProduct3;
                objCmd.ExecuteNonQuery();


            }


        }