本文实例为大家分享了C#超市收银系统设计的具体代码，供大家参考，具体内容如下
1.登录界面
代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 梦之翼小组项目{
public partial class denglu : Form {
public denglu() {
InitializeComponent();
}
model db = new model();
//实例化数据库对象 private void button1_Click(object sender, EventArgs e) {
string strConn = "Data Source=.;
Initial Catalog=shopInfo;
Integrated Security=True";
//连接数据库 SqlConnection Connection = new SqlConnection(strConn);
try {
string sqlStr = "select userName,userPassword from register where userName=@userName";
//查询 DataSet ds = new DataSet();
Connection.ConnectionString = Connection.ConnectionString;
Connection.Open();
SqlCommand cmd = new SqlCommand(sqlStr, Connection);
cmd.Parameters.Add(new SqlParameter("@userName", SqlDbType.VarChar, 30));
//传参 cmd.Parameters["@userName"].Value = userName.Text;
//给user文本框赋值 SqlDataReader dater = cmd.ExecuteReader();
if (userName.Text.Trim() == "") //如果user的值等于空 {
MessageBox.Show( "用户名不允许为空!");
}
else if (passWord.Text.Trim() == "") //同上 {
MessageBox.Show( "密码不能为空!");
}
else if (!dater.Read()) //如果输入的用户名没有被dater读到，则用户名不存在 {
MessageBox.Show( "用户名不存在！");
userName.Text = "";
passWord.Text = "";
}
else if (dater["userPassWord"].ToString().Trim() == passWord.Text.Trim()) //输入密码等于数据库密码登录成功且弹出音乐框 {
MessageBox.Show( "登录成功！");
userName.Text = "";
passWord.Text = "";
caozuoyemain frm = new caozuoyemain();
frm.ShowDialog();
}
else {
MessageBox.Show("密码错误！");
//否则密码错误 userName.Text = "";
passWord.Text = "";
}
}
catch (Exception) {
throw;
//抛出异常 }
finally {
Connection.Close();
//关闭数据库 }
}
private void label4_Click(object sender, EventArgs e) {
zhuce fra = new zhuce();
fra.ShowDialog();
}
private void label6_Click(object sender, EventArgs e) {
zhaohuimima fra = new zhaohuimima();
fra.ShowDialog();
}
private void denglu_Load(object sender, EventArgs e) {
}
}
}
2.操作界面:
代码如下：
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 梦之翼小组项目{
public partial class caozuoyemain : Form {
public caozuoyemain() {
InitializeComponent();
}
public double totalPrice;
//每种商品的总价 public double total;
//所有商品的总价 public double shijijin;
//顾客给的钱数 public double yingzhao;
// 找给顾客的钱数 public string mingcheng;
//每件商品的名称 public double shuliang;
//每件商品的数量 public double jiage;
//每件商品的价格 public int i = 0;
//商品收费的id model db = new model();
//实例化数据库对象 public void fanli() //单件物品的返利方法 {
if (jiage * shuliang < 600 && jiage * shuliang > 300) {
totalPrice = jiage * shuliang - 100;
}
else {
totalPrice = jiage * shuliang;
}
}
private void confirm_Click(object sender, EventArgs e) //单击确定按钮的事件 {
totalPrice = 0;
//每一次商品的单个金额 jiage = Convert.ToDouble(price.Text);
shuliang = Convert.ToDouble(number.Text);
//数据类型的转换 switch (jisuanfangshi.SelectedIndex) {
case 0: totalPrice = jiage * shuliang;
break;
case 1: totalPrice = jiage * shuliang*0.8;
break;
case 2: fanli();
//调用单个物品的返利方法 break;
}
total = totalPrice + total;
//所有商品的总金额 zongjine.Text = total.ToString();
//总金额转换数据类型，显示到文本框里面 i++;
//每一次的商品id加1，为了调出所有商品的最后一个数据 db.dbcon();
try {
string insertInfo = "insert wupin values('" + i.ToString() + "','" + tradeName.Text + "','" + price.Text + "','" + number.Text + "','" + jisuanfangshi.Text + "','" + totalPrice.ToString() + "')";
db.dbInsert(insertInfo);
string selstr = "select top "+i+" * from wupin order by 物品ID desc";
db.dbFill(selstr);
dataGridView1.DataSource = db.dt;
}
catch (Exception) {
MessageBox.Show("不好意思，信息有误，注册失败");
}
}
private void caozuoyemain_Load(object sender, EventArgs e) {
db.dbcon();
string qingkong = "TRUNCATE TABLE wupin";
db.dbInsert(qingkong);
jisuanfangshi.SelectedIndex = 0;
}
private void jiesuan_Click(object sender, EventArgs e) {
shijijin = Convert.ToDouble(shishoujine.Text);
yingzhao=Convert.ToDouble(zongjine.Text) ;
yingzhao = shijijin - total;
zhaojine.Text = yingzhao.ToString()+"元";
}
private void resetting_Click(object sender, EventArgs e) {
tradeName.Text = "";
price.Text = "";
number.Text = "";
}
}
}
3.收银员注册界面：
代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 梦之翼小组项目{
public partial class zhuce : Form {
public zhuce() {
InitializeComponent();
}
public string sexValue;
//接收性别的字段 model db = new model();
//实例化数据库对象 private bool testuserName(string strUsername) //检测用户名的方法 {
bool strResult;
// 判断结果的接收 Regex exStrUserName = new Regex(@"^[a-zA-Z][a-zA-Z0-9]{
3,8}
$");
//正则表达式的书写 if (strResult = exStrUserName.Match(strUsername).Success) {
yonghuming_test.Text = "✔
";
}
else {
MessageBox.Show("用户名由3—6位的字母和数字组成，必须以字母开头");
}
return strResult;
}
private bool testPassWord(string strUsername) //检测密码的方法 {
bool strResult;
// 判断结果的接收 Regex exStrUserName = new Regex(@"^[w-~!@#$%^&*()+{
}
[ ]:]{
6,16}
");
//正则表达式的书写 if (strResult = exStrUserName.Match(strUsername).Success) {
mima_test.Text = "✔
";
}
else {
mima_test.Text = "✘
";
MessageBox.Show("密码由6—16位的字母和数字或符号组成");
}
return strResult;
}
private bool testName(string strUsername) //检测姓名的方法 {
bool strResult;
// 判断结果的接收 Regex exStrUserName = new Regex(@"^([a-zA-Z0-9u4e00-u9fa5·]{
2,3}
)$");
//正则表达式的书写 if (strResult = exStrUserName.Match(strUsername).Success) {
name_test.Text = "✔
";
}
else {
name_test.Text = "✘
";
MessageBox.Show("请文明用语，输入合法的中文姓名哦");
}
if (name_text.Text == "小猫" || name_text.Text == "小狗" || name_text.Text == "傻逼") {
name_test.Text = "✘
";
MessageBox.Show("请文明用语，输入合法的中文姓名哦");
}
return strResult;
}
private bool testPhonnumber(string strUsername) //检测手机号的方法 {
bool strResult;
// 判断结果的接收 Regex exStrUserName = new Regex(@"^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{
8}
$");
//正则表达式的书写 if (strResult = exStrUserName.Match(strUsername).Success) {
phonnumber_test.Text = "✔
";
}
else {
phonnumber_test.Text = "✘
";
MessageBox.Show("请输入正确的手机号码");
}
return strResult;
}
private void nan_rb_CheckedChanged(object sender, EventArgs e) //选择性别的事件 {
sexValue = nan_rb.Text;
}
private void nv_rb_CheckedChanged(object sender, EventArgs e) {
sexValue = nv_rb.Text;
}
private void zhuce_bt_Click(object sender, EventArgs e) //注册的点击事件 {
db.dbcon();
try {
string insertInfo = "insert register values('" + username_text.Text + "','" + password_text.Text+ "','" + name_text.Text+ "','" + sexValue + "','" + phonnumber_text.Text + "')";
db.dbInsert(insertInfo);
DialogResult dr=MessageBox.Show("恭喜你注册成功,是否转到登录界面","注册成功对话框",MessageBoxButtons.OKCancel,MessageBoxIcon.Information);
if (dr == DialogResult.OK) {
this.Close();
denglu fra = new denglu();
fra.ShowDialog();
}
else if (dr == DialogResult.Cancel) {
this.Close();
}
}
catch (Exception) {
MessageBox.Show("不好意思，信息有误，注册失败");
}
}
private void username_text_Leave(object sender, EventArgs e) //用户名文本框的光标事件 {
if (username_text.Text == "") {
MessageBox.Show("用户名不能为空");
}
else {
testuserName(username_text.Text);
}
}
private void password_text_Leave(object sender, EventArgs e)//密码文本框的光标事件 {
if (password_text.Text == "") {
MessageBox.Show("密码不能为空");
}
else {
testPassWord(password_text.Text);
}
}
private void name_text_Leave(object sender, EventArgs e)//姓名文本框的光标事件 {
if (name_text.Text == "") {
MessageBox.Show("姓名不能为空");
}
else {
testName(name_text.Text);
}
}
private void phonnumber_text_Leave(object sender, EventArgs e)//手机号文本框的光标事件 {
if (phonnumber_text.Text == "") {
MessageBox.Show("手机号不能为空");
}
else {
testPhonnumber(phonnumber_text.Text);
}
}
private void chongzhi_bt_Click(object sender, EventArgs e) //重置按钮 {
username_text.Text = "";
phonnumber_text.Text = "";
name_text.Text = "";
phonnumber_text.Text = "";
}
private void quxiao_bt_Click(object sender, EventArgs e)// 取消事件 {
this.Close();
}
private void zhuce_Load(object sender, EventArgs e) {
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
