/// <summary>
        /// Completing the reservation
        /// </summary>
        private void CompleteReservation()
        {
            DialogResult dialogResult = MessageBox.Show("Weet je zeker dat alle gegevens kloppen?", "Reservering afronden", MessageBoxButtons.YesNo);
            if (dialogResult == DialogResult.Yes)
            {
                int reservationId;
                int mainUserId;
                int bookerId;
                int mainBookerId;
                userName = mainBooker.FirstName + mainBooker.LastName;
                bool userNameNotCorrect = true;

                Database db = new Database();
                db.OpenConnection();
                db.CreateCommand("INSERT INTO RESERVATIONS (MAINBOOKER_ID, TOTALCOSTS, TOTALPAYED, CREATED) VALUES (0, :totalcosts, :totalpayed, :created) RETURNING id INTO :LASTID");
                db.AddParameter("totalcosts", numPayCosts.Value);
                db.AddParameter("totalpayed", 0);
                db.AddParameter("created", DateTime.Now);
                db.GetParameter(":LASTID");
                db.ExecuteCommand();

                OracleParameter lastId = db.lastId;
                //MessageBox.Show(lastId.Value.ToString());
                reservationId = Convert.ToInt32(lastId.Value.ToString());

                while (userNameNotCorrect)
                {
                    db.CreateCommand("SELECT USERNAME FROM USERS WHERE USERNAME = :username");
                    db.AddParameter(":username", userName);

                    db.OpenConnection();
                    db.ExecuteCommand();

                    OracleDataReader dr = db.DataReader;
                    if (dr.HasRows)
                        userName += 1.ToString();
                    else
                        userNameNotCorrect = false;
                }

                userNames.Add(userName);

                db.CreateCommand("INSERT INTO USERS (USERNAME, PASSWORD, UPLOADLIMIT, ISEMPLOYEE) VALUES (:username, :password, :uploadlimit, 0) RETURNING id INTO :LASTID");
                db.AddParameter("username", userName);
                passWords.Add(GeneratePassword(8));
                db.AddParameter("password", passWords[0]);
                db.AddParameter("uploadlimit", 5000000);
                db.GetParameter(":LASTID");
                db.ExecuteCommand();

                lastId = db.lastId;
                //MessageBox.Show(lastId.Value.ToString());
                mainUserId = Convert.ToInt32(lastId.Value.ToString());

                db.CreateCommand("SELECT * FROM ( SELECT ID,CARDVALUE FROM CARDVALUES WHERE AVAILABLE = 1 ) WHERE ROWNUM = 1");
                db.ExecuteCommand();

                OracleDataReader odr = db.DataReader;
                string cardValue;
                cardValue = GeneratePassword(10);
                while (odr.Read())
                {
                    cardValue = odr.GetString(1);
                    db.CreateCommand("UPDATE CARDVALUES SET AVAILABLE = 0 WHERE id = :id");
                    db.AddParameter("id", odr.GetInt16(0));
                    db.ExecuteCommand();
                }

                db.CreateCommand("INSERT INTO BOOKERS (RESERVATIONS_ID, USERS_ID, LOCATIONS_ID, FIRSTNAME, PHONE, CARDVALUE) VALUES (:reservation_id, :user_id, :location_id, :firstname, :phone, :cardvalue) RETURNING id INTO :LASTID");
                db.AddParameter("reservation_id", reservationId);
                db.AddParameter("user_id", mainUserId);
                db.AddParameter("location_id", Convert.ToInt16(lbCampPlace.Text));
                db.AddParameter("firstname", mainBooker.FirstName);
                db.AddParameter("phone", mainBooker.Phone);
                db.AddParameter("cardvalue", cardValue);
                db.GetParameter(":LASTID");
                db.ExecuteCommand();

                lastId = db.lastId;
               // MessageBox.Show(lastId.Value.ToString());
                bookerId = Convert.ToInt32(lastId.Value.ToString());

                db.CreateCommand("INSERT INTO MAINBOOKERS (BOOKERS_ID, LASTNAME, ADDRESS, POSTALCODE, PLACE, LAND) VALUES (:booker_id, :lastname, :address, :postalcode, :place, :land) RETURNING id INTO :LASTID");
                db.AddParameter("booker_id", bookerId);
                db.AddParameter("lastname", mainBooker.LastName);
                db.AddParameter("address", mainBooker.Address);
                db.AddParameter("postalcode", mainBooker.PostalCode);
                db.AddParameter("place", mainBooker.Place);
                db.AddParameter("land", mainBooker.Land);
                db.GetParameter(":LASTID");
                db.ExecuteCommand();

                lastId = db.lastId;
               // MessageBox.Show(lastId.Value.ToString());
                mainBookerId = Convert.ToInt32(lastId.Value.ToString());

                db.CreateCommand("UPDATE RESERVATIONS SET MAINBOOKER_ID = :mainbooker_id WHERE id = :reservation_id");
                db.AddParameter("mainbooker_id", mainBookerId);
                db.AddParameter("reservation_id", reservationId);
                db.ExecuteCommand();

                for (int i = 0; i < medeboekers.Count; i++)
                {
                    userName = medeboekers[i].Name;
                    userNameNotCorrect = true;
                    while (userNameNotCorrect)
                    {
                        db.CreateCommand("SELECT USERNAME FROM USERS WHERE USERNAME = :username");
                        db.AddParameter(":username", userName);

                        db.OpenConnection();
                        db.ExecuteCommand();

                        OracleDataReader dr = db.DataReader;
                        if (dr.HasRows)
                            userName += 1.ToString();
                        else
                            userNameNotCorrect = false;
                    }
                    userNames.Add(userName);

                    db.CreateCommand("INSERT INTO USERS (USERNAME, PASSWORD, UPLOADLIMIT, ISEMPLOYEE) VALUES (:username, :password, :uploadlimit, 0) RETURNING id INTO :LASTID");
                    db.AddParameter("username", userName);
                    passWords.Add(GeneratePassword(8));
                    db.AddParameter("password", passWords[i + 1]);
                    db.AddParameter("uploadlimit", 5000000);
                    db.GetParameter(":LASTID");
                    db.ExecuteCommand();

                    lastId = db.lastId;
                    //MessageBox.Show(lastId.Value.ToString());
                    int userId = Convert.ToInt32(lastId.Value.ToString());

                    db.CreateCommand("SELECT * FROM ( SELECT ID,CARDVALUE FROM CARDVALUES WHERE AVAILABLE = 1 ) WHERE ROWNUM = 1");
                    db.ExecuteCommand();

                    OracleDataReader dar = db.DataReader;
                    cardValue = GeneratePassword(10);
                    while (odr.Read())
                    {
                        cardValue = dar.GetString(1);
                        db.CreateCommand("UPDATE CARDVALUES SET AVAILABLE = 0 WHERE id = :id");
                        db.AddParameter("id", dar.GetInt16(0));
                        db.ExecuteCommand();
                    }

                    db.CreateCommand("INSERT INTO BOOKERS (RESERVATIONS_ID, USERS_ID, LOCATIONS_ID, FIRSTNAME, PHONE, CARDVALUE) VALUES (:reservation_id, :user_id, :location_id, :firstname, :phone, :cardvalue)");
                    db.AddParameter("reservation_id", reservationId);
                    db.AddParameter("user_id", userId);
                    db.AddParameter("location_id", Convert.ToInt16(lbCampPlace.Text));
                    db.AddParameter("firstname", medeboekers[i].Name);
                    db.AddParameter("phone", medeboekers[i].PhoneNumber);
                    db.AddParameter("cardvalue", cardValue);
                    db.ExecuteCommand();
                }

                db.CloseConnection();

                CreateEndTextFile();

                //EMPTY FORMS
                //STEP 1
                numNumPers.Value = 0;
                tbFirstName.Text = "";
                tbLastName.Text = "";
                tbPhone.Text = "";
                tbAddress.Text = "";
                tbPostalCode.Text = "";
                tbLivePlace.Text = "";
                tbLand.Text = "";

                //STEP 3
                cbPayMethod.SelectedIndex = -1;
                tbPayName.Text = "";
                tbPayIBAN.Text = "";
                cbPayLater.Checked = false;

                //STEP 4
                lbCampPlace.Text = "";

                //STEP 5
                uitleenbareItems.Clear();
                geleendeItems.Clear();
                cbNoItemReservation.Checked = false;

                MessageBox.Show("De reservering is succesvol in de database geplaatst", "Succes!");

                Reserveren.SelectedIndex = 0;
            }
        }