Properties: Side Effects When Setting Values


/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson

Publisher: Apress  L.P.
ISBN: 1-893115-62-3
*/
// 18 - Properties\Side Effects When Setting Values
// copyright 2000 Eric Gunnerson
using System;
using System.Collections;
class Basket
{
    internal void UpdateTotal()
    {
        total = 0;
        foreach (BasketItem item in items)
        {
            total += item.Total;
        }
    }
    
    ArrayList    items = new ArrayList();
    Decimal    total;
}
public class BasketItem
{
    BasketItem(Basket basket)
    {
        this.basket = basket;
    }
    public int Quantity
    {
        get
        {
            return(quantity);
        }
        set
        {
            quantity = value;
            basket.UpdateTotal();
        }
    }
    public Decimal Price
    {
        get
        {
            return(price);
        }
        set
        {
            price = value;
            basket.UpdateTotal();
        }
    }
    public Decimal Total
    {
        get
        {
            // volume discount; 10% if 10 or more are purchased
            if (quantity >= 10)
            return(quantity * price * 0.90m);
            else
            return(quantity * price); 
        }
    }
    
    int        quantity;     // count of the item
    Decimal    price;        // price of the item
    Basket     basket;       // reference back to the basket
}

1.	Override Properties
2.	enum based attribute
3.	A simple property example
4.	Add Length property to FailSoftArray
5.	Convert errflag into a property
6.	Error handling in property setter validating
7.	Use properties to set and get private members
8.	Define properties for class
9.	Demonstrates the use of properties to control how values are saved in fields
10.	Illustrates the use of a property
11.	The use of an abstract property
12.	access to a private field through a property
13.	Properties: Use of Properties
14.	Properties Accessors
15.	Delegates as Static Properties
16.	Properties:Static Properties
17.	Properties:Virtual Properties

Properties: Side Effects When Setting Values : Properties « Class Interface « C# / C Sharp

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