}//po

        private void btnShto_Click(object sender, EventArgs e)
        {
            SqlConnection connectioni = new SqlConnection(connectionstring);
            OTP           onetimepad  = new OTP();

            string sparulla = rtbparullat.Text;
            string qelesi   = onetimepad.GjeneroCelesin(sparulla.Length);

            StringBuilder plaintekst = new StringBuilder(sparulla);
            StringBuilder celesi     = new StringBuilder(qelesi);
            StringBuilder cipher     = onetimepad.Enkriptimi(plaintekst, celesi);

            string cipher_tekst = cipher.ToString();

            cipher_tekst.Replace(" ", "");

            //string _query = "INSERT INTO Parullat(Nr,parullatt) VALUES('" +""+ txtnr.Text+ "," + cipher_tekst + "" + "');";

            connectioni.Open();

            SqlCommand komanda = new SqlCommand("InsertoParullat", connectioni);

            komanda.CommandType = CommandType.StoredProcedure;
            SqlParameter param = new SqlParameter("@Nr", SqlDbType.Int);

            param.Direction = ParameterDirection.Input;
            param.Value     = Convert.ToInt32(txtnr.Text);
            komanda.Parameters.Add(param);

            param           = new SqlParameter("@Parulla", SqlDbType.NVarChar);
            param.Direction = ParameterDirection.Input;
            param.Value     = cipher_tekst;
            komanda.Parameters.Add(param);

            try {
                komanda.ExecuteNonQuery();
            }
            catch (SqlException ex) {
                string message = ex.Message;
                connectioni.Close();
            }
        }
        private void btnShfaqParullen_Click(object sender, EventArgs e)
        {
            SqlConnection connectioni = new SqlConnection(connectionstring);
            OTP           padi        = new OTP();
            // string query_cipheri = " SELECT Parulla " + "FROM Parullat  "+
            //  " WHERE Nr='" + txtnr.Text + "'";
            DataTable dt = new DataTable();

            SqlCommand Komanda = new SqlCommand("ListaEParullave", connectioni);

            Komanda.CommandType = CommandType.StoredProcedure;
            SqlParameter param = new SqlParameter("@ID", SqlDbType.Int);

            param.Direction = ParameterDirection.Input;
            param.Value     = Convert.ToInt32(txtnr.Text);
            Komanda.Parameters.Add(param);
            SqlDataAdapter adapter    = new SqlDataAdapter(Komanda);
            string         ciphertext = "";
            string         key        = "";

            try {
                connectioni.Open();
                adapter.Fill(dt);

                dgvparullat.DataSource = dt;
            }
            catch (SqlException ex) {
                string message = ex.Message;
                connectioni.Close();
            }


            StringBuilder Ciphertexti = new StringBuilder(ciphertext);
            StringBuilder Key         = new StringBuilder(key);
            StringBuilder Plaintexti  = padi.Enkriptimi(Ciphertexti, Key);

            rtbparullat.Text = Plaintexti.ToString();
            btnFshij.Visible = true;

            indikatori = false;
        }