C#超市收银系统设计

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-Z0-9\u4e00-\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 == " * ")
  {
   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)
 {

}

}
}