CafeProject.frmKategori.katDoldur C# (CSharp) Метод

        public void katDoldur()
        {
            katAdi.Clear();
            katId.Clear();
            listBox_kat.Items.Clear();
            db.dbConnect();
            SqlDataReader dr = db.getData("select * from kategoriler");
            while (dr.Read())
            {
                listBox_kat.Items.Add(dr["adi"].ToString());
                katId.Add(dr["id"].ToString());
                katAdi.Add(dr["adi"].ToString());
                txt_ekle.Clear();
            }
        }