/// <summary>
/// Reserves a rail for a tram.
/// </summary>
/// <param name="sender">Contains a reference to the pressed button.</param>
/// <param name="e">contains nothing useful</param>
private void BtnOk_Click(object sender, EventArgs e)
{
if (this.rtbxTram.Text.Trim().Length > 0)
{
string tramNumber = this.rtbxTram.Text.Trim();
Tram tram = this.tramDepotManagementSystem.GetTram(tramNumber);
Reservation reservation = new Reservation(tram, this.rail);
try
{
this.tramDepotManagementSystem.AddReservation(reservation);
this.DialogResult = DialogResult.OK;
this.Close();
}
catch (Exception ex)
{
this.ShowErrorMessage("The reservation could not be added:" + System.Environment.NewLine + ex.Message);
}
}
}
/// <summary>
/// Removes a reservation
/// </summary>
/// <param name="reservation">The reservation which is tot be removed.</param>
public void RemoveReservation(Reservation reservation)
{
DatabaseManager.RemoveReservation(reservation);
this.Reservations.Remove(reservation);
}
/// <summary>
/// Adds a reservation. If the reservation already exists, the reservation will not be added and this method will return false.
/// </summary>
/// <param name="reservation">The reservation that is to be added.</param>
/// <returns>A boolean indicating if the reservation already existed.</returns>
public bool AddReservation(Reservation reservation)
{
if (!this.Reservations.Exists(r => r == reservation))
{
DatabaseManager.AddReservation(reservation);
this.Reservations.Add(reservation);
return true;
}
return false;
}
/// <summary>
/// Adds the reservation for the tram and the rail to the database, which are both supplied in the given Reservation.
/// At least one sector of the rail will be kept free for the tram the reservation is made for.
/// </summary>
/// <param name="reservation">The reservation containing the details of the tram and rail the reservation is made for.</param>
/// <param name="closeConnection">If true, closes the database connection at the end of this method.</param>
/// <returns>Succession of the insert. False when the row wasn't inserted, due to the reservation already existing, the tram not existing or the rail not existing.</returns>
public static bool AddReservation(Reservation reservation, bool closeConnection = true)
{
try
{
OracleCommand command = CreateOracleCommand("INSERT INTO RESERVERING(SPOOR_ID, WAGEN_ID) VALUES(:RailID, :TramID)");
command.Parameters.Add(":RailID", reservation.Rail.ID);
command.Parameters.Add(":TramID", reservation.Tram.ID);
return ExecuteNonQuery(command);
}
finally
{
if (closeConnection)
{
connection.Close();
}
}
}
/// <summary>
/// Removes the given reservation from the database.
/// </summary>
/// <param name="reservation">The reservation to remove.</param>
/// <param name="closeConnection">If true, closes the database connection at the end of this method.</param>
/// <returns>Value indicating whether the removal succeeded or not.</returns>
public static bool RemoveReservation(Reservation reservation, bool closeConnection = true)
{
try
{
OracleCommand command = CreateOracleCommand("DELETE FROM RESERVERING WHERE SPOOR_ID = :RailID AND WAGEN_ID = :TramID");
command.Parameters.Add(":RailID", reservation.Rail.ID);
command.Parameters.Add(":TramID", reservation.Tram.ID);
return ExecuteNonQuery(command);
}
finally
{
if (closeConnection)
{
connection.Close();
}
}
}
