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 == "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。