C#简易商城收银系统v1.0(2-1)
2021-02-04 00:13
标签：partial str 需要 res event break win sele 总结 当初： 现在： 可以参考之前的 计算器 随笔 创建窗体程序 客户端代码 实现效果 现在增加一个打折功能 客户端代码 总结 像Convert.ToDouble()很多这样重复的 打折的分支可以考虑重构 客户端实例化出来 只需要更改运算 可以尝试使用简单工厂实现 下一篇随笔就用简单工厂来实现商城收银系统v1.0 C#简易商城收银系统v1.0(2-1) 标签：partial str 需要 res event break win sele 总结 原文地址：https://www.cnblogs.com/zaohuojian/p/11494997.htmlC#简易商城收银系统v1.0(2-1)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 商城收银软件
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
double total = 0.0d;//声明一个double变量,用total来计算总计
private void button1_Click(object sender, EventArgs e)
{
double totalPrices = Convert.ToDouble(txtPrice.Text) * Convert.ToDouble(txtNum.Text);
total = total + totalPrices;//将每个商品合计计算出来
lbxList.Text = "单价:" + txtPrice.Text + "数量:" + txtNum.Text + "合计:" + totalPrices.ToString(); //显示信息
lblResult.Text = total.ToString();//显示总计数
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 商城收银软件
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
double total = 0.0d;//声明一个double变量,用total来计算总计
private void button1_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.Text = "单价:" + txtPrice.Text + "数量:" + txtNum.Text + " " + cbxType.SelectedItem + "合计:" + totalPrices.ToString();
lblResult.Text = total.ToString();
}
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;
}
}