Question

C# question

In this project, you will create your own on-line shopping store in the console application. You can choose different products to sell in your store (at least 8 products). You will create an product inventory text file.

The program will display two options at the beginning of the program, Customer and Manager.
Customer:
If this is a new customer, the program will let customer to register with their information and assign a unique ID number to the new customer.
The customer will enter the customer id every time when they are shopping in your store and the program will keep tracking the total amount the customer spend each time to determine the discount level. You can create your discount level rule.

The program has to keep tracking the products inventory. If customer select the product that is out of stock, the program has to display a warning message and let customer continue to shop. After customer finish selecting the products, the program will calculate the subtotal, apply the discount, calculate the tax, and the total. The program will display a receipt on the screen and save it to a text file with customer information.

Manager:
   The manager option has to be password protected. The program will give the manager two option:
Display the inventory: display all the products stock information
Restock the products: add more stock for each product

You have to create different classes and utilize the inheritance features. You have to text files to keep all the information the program need. You can check some on-line store to get some ideas (Amazon, Walmart …). Make sure your program does not end unexpectedly and let user have the option to continue.   

Answer 1

CODE:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EShopping
{
class Program
{
private static List<Product> _prdctList;
private const string _customerFlder= @"C:\Projects\Repos\Research\CSharp_1104_1\";
private const double _10PrcntDiscount = 1800.00;
private const string _mgrPass = "Manager1234";
static void Main(string[] args)
{
LoadProductList();
Console.WriteLine("------------------- MENU -----------------");
Console.WriteLine("Please select your role:{0}1 for CUSTOMER{1}2 for MANAGER{2}0 to EXIT",
Environment.NewLine,Environment.NewLine,Environment.NewLine);
try
{
while (true)
{
int selection = Convert.ToInt16(Console.ReadLine());
if (selection == 1)
{
CustomerMenu();
}
else if (selection == 2)
{
ManagerMenu();
}
else if (selection == 0)
{
break;
}
else
{
Console.WriteLine("Please select options from 1,2 and 0 only");
}
}
}catch(Exception ex)
{
Console.WriteLine("Invalid inputs provided, Program will exit now");
}

Console.ReadLine();
  
}

private static void ManagerMenu()
{
Console.WriteLine("----WELCOME TO MANAGER MENU-----");
try
{
Console.WriteLine("Please enter your password");
string pass = Console.ReadLine();
if (pass == _mgrPass)
{
while (true)
{
Console.WriteLine("Please select your task:{0}1 for DISPLAY INVENTORY{1}2 for ReSTOCK INVENTORY",
Environment.NewLine, Environment.NewLine);
int selection = Convert.ToInt16(Console.ReadLine());
if (selection == 1)
{
ProductMenu();
}
else if (selection == 2)
{
LoadProductList();
ProductMenu();
}
}
}
else
{
Console.WriteLine("Please enter correct password");
}
}
catch (Exception)
{
throw;
}
}

private static void CustomerMenu()
{
Console.WriteLine("----WELCOME TO CUSTOMER SECTION-----");
try
{
Console.WriteLine("Please provide the customer ID: ");
int id=Convert.ToInt32(Console.ReadLine());
Customer cstmer = new Customer();
List<string> files = Directory.GetFiles(_customerFlder).ToList();
bool fileExists = files.Any(x => x.ToLower().Contains(id.ToString()));

if (fileExists)
{
cstmer.IsNew = false;
string fileName = files.Select(x => x.ToLower().Contains(id.ToString()))
.FirstOrDefault().ToString();
List<string> lines = File.ReadAllLines(fileName).ToList();
cstmer.Name = lines[1].Trim();
Console.WriteLine("Welcome Back, {}", cstmer.Name);
}else
{
cstmer.IsNew = true;
cstmer.ID = id;
Console.WriteLine("Welcome to our portal, it seems you are visiting us for first time");
Console.WriteLine("Please enter your name:");
string name = Console.ReadLine();
cstmer.Name = name;
}
string cartList =string.Format("Customer Name:{0}{1}{2} Name\t\tQuantity",
Environment.NewLine,cstmer.Name,Environment.NewLine);
while (true)
{
ProductMenu();
Console.WriteLine("Press 1 to continue shopping, 0 to exit");
int selection = Convert.ToInt16(Console.ReadLine());
if (selection == 0)
{
break;
}
else if (selection == 1)
{}
else
{
Console.WriteLine("Please select options from 1 and 0 only");
}
  
Console.WriteLine(@"Please enter the Product Number,Quantity to add in your cart.
Example: 3,5 means 5 quantities of Product_Three");
string input = Console.ReadLine();
int[] usrInpt = input.Split(',').Select(Int32.Parse).ToArray();
if (usrInpt.Count() > 1)
{
if (_prdctList[usrInpt[0] - 1].StockQty < usrInpt[1])
Console.WriteLine("The number of selected quantity is less than that of stock of that item!");
else
{
cstmer.CartAmt+=usrInpt[1] * _prdctList[usrInpt[0] - 1].StockQty;
_prdctList[usrInpt[0] - 1].StockQty -= usrInpt[1];
cartList += string.Format("{0}{1}\t{2}", Environment.NewLine, _prdctList[usrInpt[0] - 1].PrdctName, usrInpt[0]);
}
}
}

double amt = cstmer.CartAmt > _10PrcntDiscount ? cstmer.CartAmt * 0.9 : cstmer.CartAmt;
string custFileName = string.Format("{0}CUSTOMER_{1}.txt", _customerFlder, id);
string receiptFileName = string.Format("{0}CUSTOMER_{1}_{2}.txt", _customerFlder, id,DateTime.Now.ToString("ddMMyyyy_hhmm"));
cartList += string.Format("\n{0}Total Amount: {1}", Environment.NewLine,amt);
if (cstmer.IsNew)
{
string newFile = string.Format("CUSOMER{0}{1}{2}", Environment.NewLine, cstmer.Name, Environment.NewLine);
newFile += string.Format("{0}Shopping on {1} for total sum of: {2}",Environment.NewLine,DateTime.Now.ToShortDateString(),amt);
File.WriteAllText(custFileName, newFile);
}
else
{
string cntent= string.Format("{0}Shopping on {1} for total sum of: {2}", Environment.NewLine, DateTime.Now.ToString("ddMMyyyy_hhmm"), amt);
File.AppendAllText(custFileName, cntent);
}

// Gnenerate Script
File.WriteAllText(receiptFileName, cartList);

}
catch(Exception ex)
{
throw;
}
}

private static void LoadProductList()
{
_prdctList = new List<Product>();
Random rand = new Random();
_prdctList.Add(new Product() { PrdctName = "Product_One", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
_prdctList.Add(new Product() { PrdctName = "Product_Two", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
_prdctList.Add(new Product() { PrdctName = "Product_Three", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
_prdctList.Add(new Product() { PrdctName = "Product_Four", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
_prdctList.Add(new Product() { PrdctName = "Product_Five", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
_prdctList.Add(new Product() { PrdctName = "Product_Six", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
_prdctList.Add(new Product() { PrdctName = "Product_Seven", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
_prdctList.Add(new Product() { PrdctName = "Product_Eight", StockQty = rand.Next(6, 15), PricePerUnit = rand.Next(120, 5678) });
}

private static void ProductMenu()
{
Console.WriteLine("Item:\t\tStock Quantity");
int cntr = 1;
foreach (Product item in _prdctList)
{
Console.WriteLine("{0} {1}\t{2}",cntr,item.PrdctName,item.StockQty);
cntr++;
}
}
}

class Product
{
public string PrdctName { get; set; }
public int StockQty { get; set; }

public double PricePerUnit { get; set; }
}

class Person
{
public string Name { get; set; }
}

class Customer : Person
{
public Int32 ID { get; set; }
public bool IsNew { get; set; }
public double CartAmt { get; set; }
}

}

RESULT:

INVOICE:

Customer Name:
Smith John
Name Quantity
Product_Four 4
Product_Three 3
Product_Five 5
Product_Eight 8
Product_Two 2
Product_One 1
Product_Eight 8

Total Amount: 311