static void Main(string[] args)
{
CRM crm = new CRM();
Fleet fleet = new Fleet();
Console.WriteLine("\n### Mates-Rates Rent-a-Car Operation Menu ###\n");
Console.WriteLine("You may press the ESC key at any menu to exit. Press the BACKSPACE key to return to the previous menu.");
while (true)
{
ConsoleKeyInfo mainInput;
Console.WriteLine("\nPlease enter a character from the options below:\n");
Console.WriteLine("a) Customer Management");
Console.WriteLine("b) Fleet Management");
Console.WriteLine("c) Rental Management");
Console.WriteLine();
Console.Write(">");
mainInput = Console.ReadKey();
Console.WriteLine();
if (mainInput.Key == ConsoleKey.A)
{
while (true)
{
ConsoleKeyInfo customerInput;
Console.WriteLine("\nPlease enter a character from the options below:\n");
Console.WriteLine("a) Display Customers");
Console.WriteLine("b) New Customer");
Console.WriteLine("c) Modify Customer");
Console.WriteLine("d) Delete Customer");
Console.WriteLine();
Console.Write(">");
customerInput = Console.ReadKey();
Console.WriteLine();
if (customerInput.Key == ConsoleKey.A)
{
Console.WriteLine();
List <Customer> customers = crm.GetCustomers();
DataTable customersTable = new DataTable();
DataRow customersRow = null;
customersTable.TableName = "Customers";
customersTable.Columns.Add("ID", typeof(int)).AllowDBNull = false;
customersTable.Columns.Add("Title", typeof(string));
customersTable.Columns.Add("First Name", typeof(string));
customersTable.Columns.Add("Last Name", typeof(string));
customersTable.Columns.Add("Gender", typeof(string));
customersTable.Columns.Add("DOB", typeof(string));
for (int i = 0; i < customers.Count; i++)
{
customersRow = customersTable.NewRow(); // have new row on each iteration
customersRow["ID"] = customers[i].CustomerID;
customersRow["Title"] = customers[i].Title;
customersRow["First Name"] = customers[i].FirstNames;
customersRow["Last Name"] = customers[i].LastNames;
if (customers[i].Gen == Gender.Male)
{
customersRow["Gender"] = "Male";
}
else
{
customersRow["Gender"] = "Female";
}
customersRow["DOB"] = customers[i].DateOfBirth;
customersTable.Rows.Add(customersRow);
}
customersTable.Print();
}
else if (customerInput.Key == ConsoleKey.B)
{
while (true)
{
Customer customer;
int ID;
string title, firstName, lastName, gender, DOB;
string[] format = new string[] { "dd/MM/yyyy" };
DateTime dateTime;
Console.WriteLine("\nPlease fill the following fields (fields marked with * are required):\n");
Console.Write("Title*: ");
title = Console.ReadLine();
while (!Regex.IsMatch(title, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Title*: ");
title = Console.ReadLine();
}
Console.Write("First Name*: ");
firstName = Console.ReadLine();
while (!Regex.IsMatch(firstName, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("First Name*: ");
firstName = Console.ReadLine();
}
Console.Write("Last Name*: ");
lastName = Console.ReadLine();
while (!Regex.IsMatch(lastName, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Last Name*: ");
lastName = Console.ReadLine();
}
Console.Write("Gender*: ");
gender = Console.ReadLine();
gender = gender.ToLower();
while (gender != "male" && gender != "female")
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Gender*: ");
gender = Console.ReadLine();
gender = gender.ToLower();
}
Console.Write("DOB*: ");
DOB = Console.ReadLine();
while (!(DateTime.TryParseExact(DOB, format, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.NoCurrentDateDefault, out dateTime)))
{
Console.WriteLine("\nIncorrect Format!\n");
Console.Write("DOB*: ");
DOB = Console.ReadLine();
}
Console.WriteLine();
ID = crm.GenerateID();
if (gender == "male")
{
customer = new Customer(ID, title, firstName, lastName, Gender.Male, DOB);
}
else
{
customer = new Customer(ID, title, firstName, lastName, Gender.Female, DOB);
}
crm.AddCustomer(customer);
crm.SaveToFile();
Console.WriteLine("Successfully created new customer '" + ID + " - " + title + " " + firstName + " " + lastName + "' and added to customer list.");
break;
}
}
else if (customerInput.Key == ConsoleKey.C)
{
string ID;
Console.WriteLine("\nPlease enter an ID to modify record:\n");
Console.Write("ID: ");
ID = Console.ReadLine();
while (!Regex.IsMatch(ID, @"^\d+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("ID: ");
ID = Console.ReadLine();
}
if (crm.FindCustomer(Convert.ToInt32(ID)))
{
while (true)
{
ConsoleKeyInfo modifyCustomerInput;
Console.WriteLine("\nPlease enter a character from the options below to modify trait:\n");
Console.WriteLine("a) Title");
Console.WriteLine("b) First Name");
Console.WriteLine("c) Last Name");
Console.WriteLine("d) Gender");
Console.WriteLine("e) DOB");
Console.WriteLine();
Console.Write(">");
modifyCustomerInput = Console.ReadKey();
Console.WriteLine();
if (modifyCustomerInput.Key == ConsoleKey.A)
{
string title;
Console.Write("\nTitle: ");
title = Console.ReadLine();
while (!Regex.IsMatch(title, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Title: ");
title = Console.ReadLine();
}
crm.ModifyCustomer(Convert.ToInt32(ID), 1, title);
crm.SaveToFile();
Console.WriteLine("\nID " + ID + " is successfully modified.");
break;
}
else if (modifyCustomerInput.Key == ConsoleKey.B)
{
string firstName;
Console.Write("\nFirst Name: ");
firstName = Console.ReadLine();
while (!Regex.IsMatch(firstName, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("First Name: ");
firstName = Console.ReadLine();
}
crm.ModifyCustomer(Convert.ToInt32(ID), 2, firstName);
crm.SaveToFile();
Console.WriteLine("\nID " + ID + " is successfully modified.");
break;
}
else if (modifyCustomerInput.Key == ConsoleKey.C)
{
string lastName;
Console.Write("\nLast Name: ");
lastName = Console.ReadLine();
while (!Regex.IsMatch(lastName, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Last Name: ");
lastName = Console.ReadLine();
}
crm.ModifyCustomer(Convert.ToInt32(ID), 3, lastName);
crm.SaveToFile();
Console.WriteLine("\nID " + ID + " is successfully modified.");
break;
}
else if (modifyCustomerInput.Key == ConsoleKey.D)
{
string gender;
Console.Write("\nGender: ");
gender = Console.ReadLine();
gender = gender.ToLower();
while (gender != "male" && gender != "female")
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Gender: ");
gender = Console.ReadLine();
gender = gender.ToLower();
}
crm.ModifyCustomer(Convert.ToInt32(ID), 4, gender);
Console.WriteLine("\nID " + ID + " is successfully modified.");
break;
}
else if (modifyCustomerInput.Key == ConsoleKey.E)
{
string DOB;
string[] format = new string[] { "dd/MM/yyyy" };
DateTime dateTime;
Console.Write("\nDOB: ");
DOB = Console.ReadLine();
while (!(DateTime.TryParseExact(DOB, format, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.NoCurrentDateDefault, out dateTime)))
{
Console.WriteLine("\nIncorrect Format!\n");
Console.Write("DOB: ");
DOB = Console.ReadLine();
}
crm.ModifyCustomer(Convert.ToInt32(ID), 5, DOB);
crm.SaveToFile();
Console.WriteLine("\nID " + ID + " is successfully modified.");
break;
}
else if (modifyCustomerInput.Key == ConsoleKey.Escape)
{
crm.SaveToFile();
fleet.SaveToFile();
Environment.Exit(0);
}
else if (modifyCustomerInput.Key == ConsoleKey.Backspace)
{
break;
}
else
{
Console.WriteLine("\nInvalid Input!");
}
}
}
else
{
Console.WriteLine("\nID " + ID + " is not found.");
}
}
else if (customerInput.Key == ConsoleKey.D)
{
string ID;
Console.WriteLine("\nPlease enter an ID to delete record:\n");
Console.Write("ID: ");
ID = Console.ReadLine();
while (!Regex.IsMatch(ID, @"^\d+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("ID: ");
ID = Console.ReadLine();
}
if (crm.RemoveCustomer(Convert.ToInt32(ID), fleet))
{
Console.WriteLine("\nSuccessfully deleted customer " + ID + ".");
}
else
{
Console.WriteLine("\nCustomer " + ID + " is renting and thus cannot be deleted.");
}
}
else if (customerInput.Key == ConsoleKey.Backspace)
{
break;
}
else if (customerInput.Key == ConsoleKey.Escape)
{
crm.SaveToFile();
fleet.SaveToFile();
Environment.Exit(0);
}
else
{
Console.WriteLine("\nInvalid Input!");
}
}
}
else if (mainInput.Key == ConsoleKey.B)
{
while (true)
{
Console.WriteLine("\nPlease enter a number from the option below:\n");
Console.WriteLine("a) Display Fleet");
Console.WriteLine("b) New Vehicle");
Console.WriteLine("c) Modify Vehicle");
Console.WriteLine("d) Delete Vehicle\n");
Console.Write(">");
ConsoleKeyInfo fleetInput;
fleetInput = Console.ReadKey();
if (fleetInput.Key == ConsoleKey.A)
{
Console.WriteLine();
List <Vehicle> vehicles = fleet.GetFleets();
var fleetTable = new DataTable();
DataRow fleetRow = null;
fleetTable.TableName = "Fleet";
fleetTable.Columns.Add("Registration", typeof(string));
fleetTable.Columns.Add("Grade", typeof(string));
fleetTable.Columns.Add("Make", typeof(string));
fleetTable.Columns.Add("Model", typeof(string));
fleetTable.Columns.Add("Year", typeof(int)).AllowDBNull = false;
fleetTable.Columns.Add("NumSeats", typeof(int)).AllowDBNull = false;
fleetTable.Columns.Add("Transmission", typeof(string));
fleetTable.Columns.Add("Fuel", typeof(string));
fleetTable.Columns.Add("GPS", typeof(string));
fleetTable.Columns.Add("SunRoof", typeof(string));
fleetTable.Columns.Add("DailyRate", typeof(string));
fleetTable.Columns.Add("Colour", typeof(string));
for (int i = 0; i < vehicles.Count; i++)
{
fleetRow = fleetTable.NewRow(); // have new row on each iteration
fleetRow["Registration"] = vehicles[i].Registration;
fleetRow["Grade"] = vehicles[i].Grade;
fleetRow["Make"] = vehicles[i].Make;
fleetRow["Model"] = vehicles[i].Model;
fleetRow["Year"] = vehicles[i].Year;
fleetRow["NumSeats"] = vehicles[i].NumSeats;
fleetRow["Transmission"] = vehicles[i].Transmission;
fleetRow["Fuel"] = vehicles[i].Fuel;
fleetRow["GPS"] = vehicles[i].GPS;
fleetRow["SunRoof"] = vehicles[i].SunRoof;
fleetRow["DailyRate"] = vehicles[i].DailyRate;
fleetRow["Colour"] = vehicles[i].Colour;
fleetTable.Rows.Add(fleetRow);
}
fleetTable.Print();
}
else if (fleetInput.Key == ConsoleKey.B)
{
while (true)
{
//declare Identifier
Vehicle vehicle;
string Registration, Grade, Make, Model, Transmission, Fuel, Colour;
int Year, NumSeats;
bool GPS, SunRoof;
float DailyRate;
Console.Write("\nEnter Registration No : ");
Registration = Console.ReadLine();
//check is registration already exist or not
while (true)
{
if (fleet.CheckRegistration(Registration))
{
Console.WriteLine("\nRegistration No Already Exist! Please Enter A Unique Registration No : ");
Console.Write("\nEnter Registration No : ");
Registration = Console.ReadLine();
}
else if (Registration.Length != 6)
{
Console.WriteLine("\nRegistration Number Must Contains 6 Character");
Console.Write("Enter Registration No : ");
Registration = Console.ReadLine();
}
else
{
break;
}
}
Console.Write("Enter Grade : ");
Grade = Console.ReadLine();
//validate Grade
while (!Regex.IsMatch(Grade, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Enter Grade : ");
Grade = Console.ReadLine();
}
Console.Write("Enter Make : ");
Make = Console.ReadLine();
//validate Make
while (!Regex.IsMatch(Grade, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Enter Make : ");
Make = Console.ReadLine();
}
Console.Write("Enter Model : ");
Model = Console.ReadLine();
Console.Write("Enter Year : ");
//validate Year
while (!int.TryParse(Console.ReadLine(), out Year))
{
Console.WriteLine("\nEnter Valid Year");
Console.Write("Enter Year : ");
}
Console.Write("Enter Number Of Seats : ");
//validate NumSeats
while (!int.TryParse(Console.ReadLine(), out NumSeats))
{
Console.WriteLine("\nEnter Valid Number Of Seats");
Console.Write("Enter Number Of Seats : ");
}
Console.Write("Enter Transmission Type(Automatic/Manual) :");
Transmission = Console.ReadLine();
Transmission.Trim();
//validate trasmission
while (Transmission.ToUpper() != "AUTOMATIC" && Transmission.ToUpper() != "MANUAL")
{
Console.WriteLine("\nPlease Enter Valid Transmission Type(Automatic/Manual)");
Console.Write("Enter Transmission Type(Automatic/Manual) :");
Transmission = Console.ReadLine();
Transmission.Trim();
}
Console.Write("Enter Fuel Type (Petrol/Disel) : ");
Fuel = Console.ReadLine();
Fuel.Trim();
//validate trasmission
while (Fuel.ToUpper() != "PETROL" && Fuel.ToUpper() != "DISEL")
{
Console.WriteLine("\nPlease Enter Valid Fuel Type (Petrol/Disel)");
Console.Write("Enter Fuel Type (Petrol/Disel) : ");
Fuel = Console.ReadLine();
Fuel.Trim();
}
Console.Write("GPS (T/F) :");
string temp = Console.ReadLine();
while (temp.ToUpper() != "T" && temp.ToUpper() != "F")
{
Console.WriteLine("\nPlease Enter T or F for GPS");
Console.Write("GPS (T/F) :");
temp = Console.ReadLine();
}
//assign value to GPS bool variable
if (temp.ToUpper() == "T")
{
GPS = true;
}
else
{
GPS = false;
}
//Sunroof
Console.Write("Sun Roof (T/F): ");
temp = Console.ReadLine();
while (temp.ToUpper() != "T" && temp.ToUpper() != "F")
{
Console.WriteLine("\nPlease Enter T or F for Sun Roof");
Console.Write("Sun Roof (T/F): ");
temp = Console.ReadLine();
}
//assign value to GPS bool variable
if (temp.ToUpper() == "T")
{
SunRoof = true;
}
else
{
SunRoof = false;
}
//Daily Rate Validation
Console.Write("Please Enter Daily Rate : ");
while (!float.TryParse(Console.ReadLine(), out DailyRate))
{
Console.WriteLine("\nEnter Valid Daily Rate");
Console.Write("Please Enter Daily Rate : ");
}
Console.Write("Enter Color : ");
Colour = Console.ReadLine();
vehicle = new Vehicle(Registration, Grade, Make, Model, Year, NumSeats, Transmission, Fuel, GPS, SunRoof, DailyRate, Colour);
fleet.AddVehicle(vehicle);
Console.WriteLine("Record Saved Successfully");
break;
}
}
else if (fleetInput.Key == ConsoleKey.C)
{
while (true)
{
string Registration, Grade, Make, Model, Transmission, Fuel, Colour;
int Year, NumSeats;
bool GPS, SunRoof;
float DailyRate;
Console.Write("\nEnter Registration No : ");
Registration = Console.ReadLine();
//check is registration already exist or not
while (true)
{
if (fleet.CheckRegistration(Registration))
{
Console.WriteLine("Registration No Already Exist! Please Enter A Unique Registration No : ");
Console.Write("\nEnter Registration No : ");
Registration = Console.ReadLine();
}
else if (Registration.Length != 6)
{
Console.WriteLine("Registration Number Must Contains 6 Character");
Console.Write("\nEnter Registration No : ");
Registration = Console.ReadLine();
}
else
{
break;
}
}
Console.Write("Enter Grade : ");
Grade = Console.ReadLine();
//validate Grade
while (!Regex.IsMatch(Grade, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Enter Grade : ");
Grade = Console.ReadLine();
}
Console.Write("Enter Make : ");
Make = Console.ReadLine();
//validate Make
while (!Regex.IsMatch(Grade, @"^[a-zA-Z]+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("Enter Make : ");
Make = Console.ReadLine();
}
Console.Write("Enter Model : ");
Model = Console.ReadLine();
Console.Write("Enter Year : ");
//validate Year
while (!int.TryParse(Console.ReadLine(), out Year))
{
Console.WriteLine("\nEnter Valid Year");
Console.Write("Enter Year : ");
}
Console.Write("Enter Number Of Seats : ");
//validate NumSeats
while (!int.TryParse(Console.ReadLine(), out NumSeats))
{
Console.WriteLine("\nEnter Valid Number Of Seats");
Console.Write("Enter Number Of Seats : ");
}
Console.Write("Enter Transmission Type(Automatic/Manual) :");
Transmission = Console.ReadLine();
Transmission.Trim();
//validate trasmission
while (Transmission.ToUpper() != "AUTOMATIC" && Transmission.ToUpper() != "MANUAL")
{
Console.WriteLine("\nPlease Enter Valid Transmission Type(Automatic/Manual)");
Console.Write("Enter Transmission Type(Automatic/Manual) :");
Transmission = Console.ReadLine();
Transmission.Trim();
}
Console.Write("Enter Fuel Type (Petrol/Disel) : ");
Fuel = Console.ReadLine();
//validate trasmission
Fuel.Trim();
while (Fuel.ToUpper() != "PETROL" && Fuel.ToUpper() != "DISEL")
{
Console.WriteLine("\nPlease Enter Valid Fuel Type (Petrol/Disel)");
Console.Write("Enter Fuel Type (Petrol/Disel) : ");
Fuel = Console.ReadLine();
Fuel.Trim();
}
Console.Write("GPS (T/F) :");
string temp = Console.ReadLine();
while (temp.ToUpper() != "T" && temp.ToUpper() != "F")
{
Console.WriteLine("\nPlease Enter T or F for GPS");
Console.Write("GPS (T/F) :");
temp = Console.ReadLine();
}
//assign value to GPS bool variable
if (temp.ToUpper() == "T")
{
GPS = true;
}
else
{
GPS = false;
}
//Sunroof
Console.Write("Sun Roof (T/F): ");
temp = Console.ReadLine();
while (temp.ToUpper() != "T" && temp.ToUpper() != "F")
{
Console.WriteLine("\nPlease Enter T or F for Sun Roof");
Console.Write("Sun Roof (T/F): ");
temp = Console.ReadLine();
}
//assign value to GPS bool variable
if (temp.ToUpper() == "T")
{
SunRoof = true;
}
else
{
SunRoof = false;
}
//Daily Rate Validation
Console.Write("Please Enter Daily Rate : ");
while (!float.TryParse(Console.ReadLine(), out DailyRate))
{
Console.WriteLine("\nEnter Valid Daily Rate");
Console.Write("Please Enter Daily Rate : ");
}
Console.Write("Enter Color : ");
Colour = Console.ReadLine();
fleet.ModifyRecord(Registration, Grade, Make, Model, Year, NumSeats, Transmission, Fuel, GPS, SunRoof, DailyRate, Colour);
Console.WriteLine("Record Modify Successfully");
break;
}
}
else if (fleetInput.Key == ConsoleKey.D)
{
string RegistrationNo;
Console.WriteLine("\nPlease Enter Registration No To Delete.\n");
Console.Write("Registration No: ");
RegistrationNo = Console.ReadLine();
while (true)
{
if (!fleet.CheckRegistration(RegistrationNo))
{
Console.WriteLine("\nRegistration No. not found! Please enter a valid Registration No.");
Console.Write("\nRegistration No: ");
RegistrationNo = Console.ReadLine();
}
else if (RegistrationNo.Length != 6)
{
Console.WriteLine("\nRegistration No. must contains 6 characters.");
Console.Write("\nRegistration No: ");
RegistrationNo = Console.ReadLine();
}
else
{
break;
}
}
if (fleet.RemoveVehicle((RegistrationNo)))
{
Console.WriteLine("\nRecord Removed Successfully");
}
else
{
Console.WriteLine("\nThis vehicle is currently rented.");
}
}
else if (fleetInput.Key == ConsoleKey.Backspace)
{
break;
}
else if (fleetInput.Key == ConsoleKey.Escape)
{
crm.SaveToFile();
fleet.SaveToFile();
Environment.Exit(0);
}
else
{
Console.WriteLine("\nInvalid Input!");
}
}
}
else if (mainInput.Key == ConsoleKey.C)
{
while (true)
{
ConsoleKeyInfo rentalInput;
Console.WriteLine("\nPlease enter a character from the options below:\n");
Console.WriteLine("a) Display Rentals");
Console.WriteLine("b) Search Vehicles");
Console.WriteLine("c) Rent Vehicle");
Console.WriteLine("d) Return Vehicle");
Console.WriteLine();
Console.Write(">");
rentalInput = Console.ReadKey();
Console.WriteLine();
if (rentalInput.Key == ConsoleKey.A)
{
Console.WriteLine();
Dictionary <string, int> rentals = fleet.GetRentals();
DataTable rentalsTable = new DataTable();
DataRow rentalsRow = null;
rentalsTable.TableName = "Rentals";
rentalsTable.Columns.Add("Registration", typeof(string));
rentalsTable.Columns.Add("CustomerID", typeof(int)).AllowDBNull = false;
foreach (string regNo in rentals.Keys)
{
rentalsRow = rentalsTable.NewRow(); // have new row on each iteration
rentalsRow["Registration"] = regNo;
rentalsRow["CustomerID"] = rentals[regNo];
rentalsTable.Rows.Add(rentalsRow);
}
rentalsTable.Print();
}
else if (rentalInput.Key == ConsoleKey.B)
{
}
else if (rentalInput.Key == ConsoleKey.C)
{
string regNo;
string ID;
Console.WriteLine("\nPlease enter the registration number of vehicle you want to rent:\n");
Console.Write("Registration No.: ");
regNo = Console.ReadLine();
if (regNo.Length != 6)
{
Console.WriteLine("\nRegistration No. must contains 6 characters.");
}
else if (!fleet.CheckRegistration(regNo))
{
Console.WriteLine("\nRegistration number not found.");
}
else if (fleet.IsRented(regNo))
{
Console.WriteLine("\nVehicle " + regNo + " is already rented by customer " + fleet.RentedBy(regNo) + ".");
}
else
{
Console.WriteLine("\nPlease enter the customer ID:\n");
Console.Write("ID: ");
ID = Console.ReadLine();
while (!Regex.IsMatch(ID, @"^\d+$"))
{
Console.WriteLine("\nInvalid Input!\n");
Console.Write("ID: ");
ID = Console.ReadLine();
}
if (crm.FindCustomer(Convert.ToInt32(ID)))
{
fleet.RentCar(regNo, Convert.ToInt32(ID));
Console.WriteLine("\nVehicle " + regNo + " is successfully rented by customer " + ID + ".");
}
else
{
Console.WriteLine("\nCustomer ID not found.");
}
}
}
else if (rentalInput.Key == ConsoleKey.D)
{
string regNo;
Console.WriteLine("\nPlease enter the registration number of rented vehicle:\n");
Console.Write("Registration No.: ");
regNo = Console.ReadLine();
if (regNo.Length != 6)
{
Console.WriteLine("\nRegistration No. must contains 6 characters.");
}
else if (fleet.ReturnCar(regNo) != -1)
{
Console.WriteLine("\nVehicle " + regNo + " is successfully returned.");
}
else
{
Console.WriteLine("\nRegistration No. is not found in rentals.");
}
}
else if (rentalInput.Key == ConsoleKey.Backspace)
{
break;
}
else if (rentalInput.Key == ConsoleKey.Escape)
{
crm.SaveToFile();
fleet.SaveToFile();
Environment.Exit(0);
}
else
{
Console.WriteLine("\nInvalid Input!");
}
}
}
else if (mainInput.Key == ConsoleKey.Escape)
{
crm.SaveToFile();
fleet.SaveToFile();
Environment.Exit(0);
}
else if (mainInput.Key == ConsoleKey.Backspace)
{
//Do nothing
}
else
{
Console.WriteLine("\nInvalid Input!");
}
}
}
