static void Main(string[] args)
{
ProductInventory inventoryInstance = ProductInventory.getInstance(); //Create a instance of the ProductInventory class to get inventory items from the text file;
ShoppingCart cart1 = new ShoppingCart(); //create shopping cart instance
while (true)
{
try
{
Console.ForegroundColor = ConsoleColor.Gray;
Console.WriteLine("{0}{1}", "\n\t\t\t WELCOME TO", " THE SHOPPING CART");
Console.WriteLine("\n********************************************************************************");
Console.ForegroundColor = ConsoleColor.Magenta;
Console.WriteLine("\nFollowing Options are available to you:");
Console.ForegroundColor = ConsoleColor.Gray;
Console.WriteLine("\n1.{0}\n2.{1}\n3.{2}\n4.{3}\n5.{4}", " Add an item to CART", " Remove an item from CART", " View the CART", " Checkout and Pay", " Exit");
String optn = Console.ReadLine(); //Take input from the users to choose their desired options
int option = Int32.Parse(optn);
switch (option)
{
case 1:
Console.Clear();
Console.WriteLine("{0}{1}", "\n\t\t\t WELCOME TO", " THE SHOPPING CART");
Console.WriteLine("\n********************************************************************************");
Console.WriteLine("Items availabe:\n ");
inventoryInstance.showProductsDetails(); //show all products those are currently available in the inventory.
Console.ForegroundColor = ConsoleColor.Magenta;
Console.WriteLine("Insert an item id add to the Cart.");
String itmNo = Console.ReadLine(); //Taking input from the user to add their desired items to their Cart.
int itemNo = Int32.Parse(itmNo);
cart1.addItem(itemNo); //add item to the cart . Here "itemNo" is passing as it can be taken from the items Array.
Console.Clear();
break;
case 2:
Console.Clear();
Console.WriteLine("{0}{1}", "\n\t\t\t WELCOME TO", " THE SHOPPING CART");
Console.WriteLine("\n********************************************************************************");
bool itemsAvailable = cart1.viewCart();
if (itemsAvailable)
{
cart1.removeItem();
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\npress any key to continue.");
Console.ReadKey();
Console.Clear();
}
else
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\npress any key to continue.");
Console.ReadKey();
Console.Clear();
}
break;
case 3:
Console.Clear();
cart1.viewCart();
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\npress any key to continue.");
Console.ReadKey();
Console.Clear();
break;
case 4:
Console.Clear();
Console.WriteLine("{0}{1}", "\n\t\t\t WELCOME TO", " THE SHOPPING CART");
Console.WriteLine("\n********************************************************************************\n\n");
cart1.checkoutAndPay();
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\n\npress any key to continue.");
Console.ReadKey();
Console.Clear();
break;
case 5:
System.Environment.Exit(0);
break;
default:
Console.Clear();
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Invalid option is choosen.Input a valid One.");
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\npress any key to continue.");
Console.ReadKey();
Console.Clear();
break;
}
}
catch (NullReferenceException e)
{
Console.Clear();
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Invalid Product Id.Please, insert a valid one");
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\npress any key to continue.");
Console.ReadKey();
Console.Clear();
}
catch (ArgumentException e)
{
Console.Clear();
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Invalid option is choosen.Input a valid One.");
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\npress any key to continue.");
Console.ReadKey();
}
catch (Exception e)
{
Console.Clear();
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Invalid option is choosen.Input a valid One.");
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("\npress any key to continue.");
Console.ReadKey();
Console.Clear();
}
finally
{
}
}
}