本文實例為大家分享了C#超市收銀系統設計的具體代碼，供大家參考，具體內容如下
1.登錄界面
代碼如下：
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 夢之翼小組項目{ public partial class denglu : Form { public denglu() { InitializeComponent(); } model db = new model(); //實例化數據庫對象 private void button1_Click(object sender, EventArgs e) { string strConn = "Data Source=.;Initial Catalog=shopInfo;Integrated Security=True"; //連接數據庫 SqlConnection Connection = new SqlConnection(strConn); try { string sqlStr = "select userName,userPassword from register where userName=@userName"; //查詢 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)); //傳參 cmd.Parameters["@userName"].Value = userName.Text; //給user文本框賦值 SqlDataReader dater = cmd.ExecuteReader(); if (userName.Text.Trim() == "") //如果user的值等于空 { MessageBox.Show( "用戶名不允許為空!"); } else if (passWord.Text.Trim() == "") //同上 { MessageBox.Show( "密碼不能為空!"); } else if (!dater.Read()) //如果輸入的用戶名沒有被dater讀到，則用戶名不存在 { MessageBox.Show( "用戶名不存在！"); userName.Text = ""; passWord.Text = ""; } else if (dater["userPassWord"].ToString().Trim() == passWord.Text.Trim()) //輸入密碼等于數據庫密碼登錄成功且彈出音樂框 { MessageBox.Show( "登錄成功！"); userName.Text = ""; passWord.Text = ""; caozuoyemain frm = new caozuoyemain(); frm.ShowDialog(); } else { MessageBox.Show("密碼錯誤！"); //否則密碼錯誤 userName.Text = ""; passWord.Text = ""; } } catch (Exception) { throw; //拋出異常 } finally { Connection.Close(); //關閉數據庫 } } 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:
代碼如下：
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 夢之翼小組項目{ public partial class caozuoyemain : Form { public caozuoyemain() { InitializeComponent(); } public double totalPrice;//每種商品的總價 public double total; //所有商品的總價 public double shijijin;//顧客給的錢數 public double yingzhao;// 找給顧客的錢數 public string mingcheng;//每件商品的名稱 public double shuliang;//每件商品的數量 public double jiage;//每件商品的價格 public int i = 0; //商品收費的id model db = new model(); //實例化數據庫對象 public void fanli() //單件物品的返利方法 { if (jiage * shuliang < 600 && jiage * shuliang > 300) { totalPrice = jiage * shuliang - 100; } else { totalPrice = jiage * shuliang; } } private void confirm_Click(object sender, EventArgs e) //單擊確定按鈕的事件 { totalPrice = 0; //每一次商品的單個金額 jiage = Convert.ToDouble(price.Text); shuliang = Convert.ToDouble(number.Text); //數據類型的轉換 switch (jisuanfangshi.SelectedIndex) { case 0: totalPrice = jiage * shuliang; break; case 1: totalPrice = jiage * shuliang*0.8; break; case 2: fanli(); //調用單個物品的返利方法 break; } total = totalPrice + total; //所有商品的總金額 zongjine.Text = total.ToString();//總金額轉換數據類型，顯示到文本框里面 i++; //每一次的商品id加1，為了調出所有商品的最后一個數據 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，信息有誤，注冊失敗"); } } 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.收銀員注冊界面：
代碼如下：
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 夢之翼小組項目{ public partial class zhuce : Form { public zhuce() { InitializeComponent(); } public string sexValue; //接收性別的字段 model db = new model(); //實例化數據庫對象 private bool testuserName(string strUsername) //檢測用戶名的方法 { bool strResult;// 判斷結果的接收 Regex exStrUserName = new Regex(@"^[a-zA-Z][a-zA-Z0-9]{3,8}$"); //正則表達式的書寫 if (strResult = exStrUserName.Match(strUsername).Success) { yonghuming_test.Text = "✔"; } else { MessageBox.Show("用戶名由3―6位的字母和數字組成，必須以字母開頭"); } return strResult; } private bool testPassWord(string strUsername) //檢測密碼的方法 { bool strResult;// 判斷結果的接收 Regex exStrUserName = new Regex(@"^[/w/-~!@#$%^&*()+{}[ /]:]{6,16}"); //正則表達式的書寫 if (strResult = exStrUserName.Match(strUsername).Success) { mima_test.Text = "✔"; } else { mima_test.Text = "✘"; MessageBox.Show("密碼由6―16位的字母和數字或符號組成"); } return strResult; } private bool testName(string strUsername) //檢測姓名的方法 { bool strResult;// 判斷結果的接收 Regex exStrUserName = new Regex(@"^([a-zA-Z0-9/u4e00-/u9fa5/?]{2,3})$"); //正則表達式的書寫 if (strResult = exStrUserName.Match(strUsername).Success) { name_test.Text = "✔"; } else { name_test.Text = "✘"; MessageBox.Show("請文明用語，輸入合法的中文姓名哦"); } if (name_text.Text == "小貓" || name_text.Text == "小狗" || name_text.Text == "傻逼") { name_test.Text = "✘"; MessageBox.Show("請文明用語，輸入合法的中文姓名哦"); } return strResult; } private bool testPhonnumber(string strUsername) //檢測手機號的方法 { bool strResult;// 判斷結果的接收 Regex exStrUserName = new Regex(@"^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$"); //正則表達式的書寫 if (strResult = exStrUserName.Match(strUsername).Success) { phonnumber_test.Text = "✔"; } else { phonnumber_test.Text = "✘"; MessageBox.Show("請輸入正確的手機號碼"); } return strResult; } private void nan_rb_CheckedChanged(object sender, EventArgs e) //選擇性別的事件 { 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) //注冊的點擊事件 { 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("恭喜你注冊成功,是否轉到登錄界面","注冊成功對話框",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，信息有誤，注冊失敗"); } } private void username_text_Leave(object sender, EventArgs e) //用戶名文本框的光標事件 { if (username_text.Text == "") { MessageBox.Show("用戶名不能為空"); } else { testuserName(username_text.Text); } } private void password_text_Leave(object sender, EventArgs e)//密碼文本框的光標事件 { if (password_text.Text == "") { MessageBox.Show("密碼不能為空"); } else { testPassWord(password_text.Text); } } private void name_text_Leave(object sender, EventArgs e)//姓名文本框的光標事件 { if (name_text.Text == "") { MessageBox.Show("姓名不能為空"); } else { testName(name_text.Text); } } private void phonnumber_text_Leave(object sender, EventArgs e)//手機號文本框的光標事件 { if (phonnumber_text.Text == "") { MessageBox.Show("手機號不能為空"); } else { testPhonnumber(phonnumber_text.Text); } } private void chongzhi_bt_Click(object sender, EventArgs e) //重置按鈕 { 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內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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