private void ch_sarfiyatlar(string tarih)
        {
            htmlTable.Clear();
            List <Sarfiyatlar> sarfiyatlar = new List <Sarfiyatlar>();

            sarfiyatlar = db.sarfiyatlar_data_read(tarih, firma, unite);

            if (sarfiyatlar[0].Sarfiyat_id == 0)
            {
                //kayit bulunamadi
                htmlTable.Append("<tr>");
                htmlTable.Append("<td colspan='7'>" + sarfiyatlar[0].Sarfiyat_bilgitnm + "</td>");
                htmlTable.Append("</tr>");
            }
            else
            {
                foreach (var s in sarfiyatlar)
                {
                    htmlTable.Append("<tr>");
                    htmlTable.Append("<td>" + s.Sarfiyat_bilgitnm + "</td>");
                    htmlTable.Append("<td>" + s.Gun_miktar + "</td>");
                    htmlTable.Append("<td>" + s.Gun_ton + "</td>");
                    htmlTable.Append("<td>" + s.Ay_miktar + "</td>");
                    htmlTable.Append("<td>" + s.Ay_ton + "</td>");
                    htmlTable.Append("<td>" + s.Yil_miktar + "</td>");
                    htmlTable.Append("<td>" + s.Yil_ton + "</td>");
                    htmlTable.Append("</tr>");
                }
            }
            ph_sarfiyatlar.Controls.Add(new Literal {
                Text = htmlTable.ToString()
            });
        }