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：
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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：
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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：
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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})$"); //正则表达式的书写 if (strresult = exstrusername.match(strusername).success) { name_test.text = "✔"; } else { name_test.text = "✘"; messagebox.show("请文明用语，输入合法的中文姓名哦"); } if (name_text.text == "小猫" || name_text.text == "小狗" || name_text.text == "傻逼") { name_test.text = "✘"; messagebox.show("请文明用语，输入合法的中文姓名哦"); } return strresult; } private bool testphonnumber(string strusername) //检测手机号的方法 { bool strresult;// 判断结果的接收 regex exstrusername = new regex(@"^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$"); //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服务器之家。
