private void BilgileriAktar()
        {
            var id = Utils.ConvertToInt(Request.QueryString["KullaniciID"]);

            Button1.Text = "Güncelle";
            DataRow dr = kc.SelectItem(id);

            txt_kullaniciAdi.Text       = dr["KullaniciAdi"].ToString();
            txt_sifre.Text              = dr["KullaniciSifre"].ToString();
            DropDownList1.SelectedValue = dr["PersonelAdiSoyadi"].ToString();
        }