//看了原来的例子，我真的是弄昏了。。结果还是按照自己写的。
// DinnerParty.CS 源码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace DinnerPary.HeadFirst.Book
{
public class DinnterParty
{
public const int CostOfFoodPerson = 25;
/// <summary>
/// 人数，总共花多少钱，用了多少钱。
/// </summary>
public int NumberOfPeople;
public decimal CostOfBeveragesPerson;
public decimal CostOfDecorations;
//Decoration 装饰;
/// <summary>
/// 如果选择了健康套餐，计算出单价是多少
/// </summary>
public void SetHealthyOption(bool IsHealthOption)
{
if (IsHealthOption)
{
this.CostOfBeveragesPerson = 5.00M; //健康套餐每人5美元+5%折扣.
}
else
{
this.CostOfBeveragesPerson = 20.00m;//酒品每人20元.
}
}
/// <summary>
/// 如果选择的是特色装饰。这里只计算了特色装饰.
/// </summary>
/// <param name="IsDecoration"></param>
public void CalculateCostOfDecorations(bool IsDecoration)
{
if (IsDecoration)
{
this.CostOfDecorations = (NumberOfPeople * 15.00M) + 50M;
}
else
{
this.CostOfDecorations = (NumberOfPeople * 7.50M) + 30M;
}
}
/// <summary>
/// 如果选择的是健康套餐
/// </summary>
/// <param name="isHealthy"></param>
/// <returns></returns>
public decimal CacluateCost(bool isHealthy)
{
decimal totalCost=this.CostOfDecorations+(CostOfBeveragesPerson+CostOfFoodPerson)*NumberOfPeople;
if (isHealthy)
{
return totalCost * 0.95M;
}
else
{
return totalCost;
}
}
}
}
///然后是Form1 说明下，里面有两个checkBox 选择 Health 套餐，或者 Decoration (健康套餐 或者 特色装饰) 一个NumbericUpDown 控件.还有个Label 用来显示用了多少钱。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace DinnerPary.HeadFirst.Book //看到171了
{
public partial class Form1 : Form
{
DinnterParty dinnerPatty;
public Form1()
{
InitializeComponent();
dinnerPatty=new DinnterParty(){NumberOfPeople=5};
dinnerPatty.SetHealthyOption(false);
dinnerPatty.CalculateCostOfDecorations(true);
this.checkBoxHealthOption.Checked = false;
this.checkBoxDecoration.Checked = true;
DisplayDinnerCost();
}
/// <summary>
/// 在Label标签上面显示出要花多少钱。
/// </summary>
private void DisplayDinnerCost()
{
decimal Cost = dinnerPatty.CacluateCost(checkBoxHealthOption.Checked);
this.labelMoneyDispaly.Text= Cost.ToString("c");
}
/// <summary>
/// numberircUpDown 值变化过后对人数的影响
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
dinnerPatty.NumberOfPeople = (int)this.numericUpDown1.Value;
DisplayDinnerCost();
}
/// <summary>
/// 选择健康套餐
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void checkBoxHealthOption_CheckedChanged(object sender, EventArgs e)
{
DisplayDinnerCost();
}
/// <summary>
/// 选择装饰品
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void checkBoxDecoration_CheckedChanged(object sender, EventArgs e)
{
dinnerPatty.CalculateCostOfDecorations(this.checkBoxDecoration.Checked);
DisplayDinnerCost();
}
}
}
////接下来是自己写的类。
//DinnerParty.CS
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace DinnerParty
{
public class DinnerParty
{
private decimal totalCost;
public decimal TotalCost
{
get { return totalCost; }
}
//private decimal Price = 0;
private const int _固定Price = 25;
public DinnerParty()
{
}
public DinnerParty(int peopleOfNumber,bool isHealth,bool isDecoration)
{
this.totalCost = 0;
if (isHealth)
{
this.totalCost = (_固定Price + 5.00M) * peopleOfNumber;
}
else
{
this.totalCost = (_固定Price + 20.00M) * peopleOfNumber;
}
if (isDecoration)
{
this.totalCost += peopleOfNumber * 15.00M + 50;
}
else
{
this.totalCost += peopleOfNumber * 0.75M + 30;
}
if (isHealth)
{
totalCost = totalCost * 0.95M;
}
}
public override string ToString()
{
return this.TotalCost.ToString("c");
}
}
}
///Form1.CS
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace DinnerParty
{
public partial class Form1 : Form
{
DinnerParty dinner;
public Form1()
{
InitializeComponent();
}
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
_计算总额((int)numericUpDown1.Value, this.checkBoxHealthOption.Checked, this.checkBoxDecoration.Checked);
}
private void checkBoxHealthOption_CheckedChanged(object sender, EventArgs e)
{
_计算总额((int)numericUpDown1.Value, this.checkBoxHealthOption.Checked, this.checkBoxDecoration.Checked);
}
private void checkBoxDecoration_CheckedChanged(object sender, EventArgs e)
{
_计算总额((int)numericUpDown1.Value, this.checkBoxHealthOption.Checked, this.checkBoxDecoration.Checked);
}
private void _计算总额(int PeoleOfNumber, bool checkHealth, bool checkDecoration)
{
dinner = new DinnerParty(PeoleOfNumber, checkHealth, checkDecoration);
this.labelMoneyDispaly.Text=dinner.ToString();
}
}
}