main.cs

来自「Microsoft?Visual C#?.NET (Core Reference」· CS 代码 · 共 91 行

using System;

namespace MSPress.CSharpCoreRef.Bank
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class BankApp
	{
		static void Main(string[] args)
		{
            Account myAccount = new Account(100);
            
            Account.OverdraftEventHandler handler = null;
            handler = new Account.OverdraftEventHandler(OnOverdraft);
            myAccount.AddOnOverdraft(handler);

            bool done = false;
            do
            {
                DisplayMenu();
                string choice = Console.ReadLine();
                switch(choice.ToLower())
                {
                    case "w":
                        HandleWithdrawal(myAccount);
                        break;

                    case "d":
                        HandleDeposit(myAccount);
                        break;

                    case "q":
                        done = true;
                        break;

                    default:
                        InvalidChoice(choice);
                        break;
                }
                CurrentBalance(myAccount);
            }while(!done);
		}

        static void OnOverdraft(object sender, OverdraftEventArgs e)
        {
            Console.WriteLine("An overdraft occurred.");
            Console.WriteLine("The account balance is {0}.", e.Balance);
            Console.WriteLine("The withdrawal was {0}.", e.Withdrawal);
        }

        static void DisplayMenu()
        {
            Console.WriteLine("\n\nW) Withdraw");
            Console.WriteLine("D) Deposit");
            Console.WriteLine("Q) Quit");
            Console.Write("->");
        }

        static void InvalidChoice(string choice)
        {
            Console.WriteLine("{0} is not a valid choice.", choice);
        }

        static void HandleWithdrawal(Account anAccount)
        {
            Console.Write("Withdrawal amount: ");
            string request = Console.ReadLine();
            decimal withdrawal = Convert.ToDecimal(request);
            bool result = anAccount.Withdrawal(withdrawal);
            if(result == true)
                Console.WriteLine("Withdrawal of {0} was successful.", withdrawal);
            else
                Console.WriteLine("Withdrawal of {0} was not successful.", withdrawal);
        }

        static void HandleDeposit(Account anAccount)
        {
            Console.Write("Deposit amount: ");
            string request = Console.ReadLine();
            decimal deposit = Convert.ToDecimal(request);
            anAccount.Deposit(deposit);
        }

        static void CurrentBalance(Account anAccount)
        {
            Console.WriteLine("Balance is {0}", anAccount.Balance);
        }
	}
}