banktransaction.cs

来自「csharp-solution,C#高效编程源码」· CS 代码 · 共 44 行

    using System;
    using System.IO;

    /// <summary>
    ///   A BankTransaction is created every time a deposit or withdrawal occurs on a BankAccount
    ///   A BankTransaction records the amount of money involved, together with the current date and time.
    /// </summary>
    public class BankTransaction
    {
		private readonly decimal amount;
		private readonly DateTime when;

        public BankTransaction(decimal tranAmount)
	    {
		   amount = tranAmount;
		   when = DateTime.Now;
	    }

		public decimal Amount()
		{
			return amount;
		}

		public DateTime When()
		{
			return when;
		}		
	 
		public void Dispose()
		{
			Finalize();
		}

		~BankTransaction()
		{
			StreamWriter swFile = File.AppendText("Transactions.Dat");
			swFile.WriteLine("Date/Time: {0}\tAmount: {1}", when, amount);
			swFile.Close();
			GC.SuppressFinalize(this);
		}
    }