MySqlCommand cmdd = new MySqlCommand("SELECT * from giris where ID = '21'", baglanti);
            int Count = Convert.ToInt32(cmdd.ExecuteScalar());

            if (Count != 0)
            {
                MySqlDataReader oku = cmdd.ExecuteReader();
                while (oku.Read())
                {
                    label3.Text = oku["kullanici_giris"].ToString();
                    label4.Text = oku["kullanici_sifre"].ToString();

                }
                baglanti.Close();
            }
        }