form1.cs

大话设计模式源码bigtalkdesignpattern_src

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace 商场管理软件
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        double total = 0.0d;
  
        private void Form1_Load(object sender, EventArgs e)
        {
            cbxType.Items.AddRange(new object[] {"正常收费","打八折","打七折","打五折"});
            cbxType.SelectedIndex = 0;
        }

        private void btnOk_Click(object sender, EventArgs e)
        {
            double totalPrices=0d;
            switch(cbxType.SelectedIndex)
            {
                case 0:
                    totalPrices = Convert.ToDouble(txtPrice.Text) * Convert.ToDouble(txtNum.Text);
                    break;
                case 1:
                    totalPrices = Convert.ToDouble(txtPrice.Text) * Convert.ToDouble(txtNum.Text) * 0.8;
                    break;
                case 2:
                    totalPrices = Convert.ToDouble(txtPrice.Text) * Convert.ToDouble(txtNum.Text) * 0.7;
                    break;
                case 3:
                    totalPrices = Convert.ToDouble(txtPrice.Text) * Convert.ToDouble(txtNum.Text) * 0.5;
                    break;

            }
            total = total + totalPrices;
            lbxList.Items.Add("单价：" + txtPrice.Text + " 数量：" + txtNum.Text 
                + " "+cbxType.SelectedItem+ " 合计：" + totalPrices.ToString());
            lblResult.Text = total.ToString();
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            total = 0d;
            txtPrice.Text = "0.00";
            txtNum.Text = "1";
            lbxList.Items.Clear();
            lblResult.Text = "0.00";
        }

        
    }
}