xhotolog

public class OrderTimeDESC : IComparer

{

    int IComparer.Compare(Object order1, Object order2)

    {

        return (((Order)order1).ReceiptDateTime.CompareTo(((Order)order2).ReceiptDateTime));

    }

}

public class OrderTimeASC : IComparer

{

    int IComparer.Compare(Object order1, Object order2)

    {

            return (((Order)order2).ReceiptDateTime.CompareTo(((Order)order1).ReceiptDateTime));

    }

}

public void SortTest()

{

    IComparer orderTimeDESC = new OrderTimeDESC();

    IComparer orderTimeASC = new OrderTimeASC();

    Order order1 = new Order();

    order1.ReceiptDateTime = DateTime.Now;

    Order order2 = new Order();

    order2.ReceiptDateTime = DateTime.Now.AddDays(1);

    Order order3 = new Order();

    order3.ReceiptDateTime = DateTime.Now.AddDays(2);

    Order[] orders = new Order[3];

    orders[0] = order3;

    orders[1] = order1;

    orders[2] = order2;

    Array.Sort(orders, orderTimeASC);

    for (int i = 0; i < orders.GetLength(0); i++)

        System.Console.WriteLine(orders[i].ReceiptDateTime.ToString());

 
    Array.Sort(orders, orderTimeDESC);

    for (int i = 0; i < orders.GetLength(0); i++)

        System.Console.WriteLine(orders[i].ReceiptDateTime.ToString());

}

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