private void ch_uretim(string tarih)
        {
            htmlTable.Clear();
            List <Uretimler> uretimler = new List <Uretimler>();

            uretimler = db.uretimler_data_read(tarih, firma, unite);
            if (uretimler[0].Uretim_id == 0)
            {
                //kayit bulunamadi
                htmlTable.Append("<tr>");
                htmlTable.Append("<td colspan='4'>" + uretimler[0].Uretim_bilgitnm + "</td>");
                htmlTable.Append("</tr>");
            }
            else
            {
                foreach (var uretim in uretimler)
                {
                    htmlTable.Append("<tr>");
                    htmlTable.Append("<td>" + uretim.Uretim_bilgitnm + "</td>");
                    htmlTable.Append("<td>" + uretim.Dokum_sayisi + "</td>");
                    htmlTable.Append("<td>" + uretim.Imale_sevk_hurda + "</td>");
                    htmlTable.Append("<td>" + uretim.Uretim + "</td>");
                    htmlTable.Append("</tr>");
                }
            }
            ph_uretim.Controls.Add(new Literal {
                Text = htmlTable.ToString()
            });
        }