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测试数据ponentmodel;
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测试数据ponentmodel;
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测试数据ponentmodel;
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。
dy("nrwz");