C#实现在线点餐系统

这个是c#大作业，写作业很用心，写了很久，所以留存一下。不是现在的是之前的的期末作业，现在才想着整理一下

实现功能：

1、商家登录；客户的登录、注册。
2、商家界面实现了对菜单的增、删、改、查；还有订单的查看、查询、结账（删除订单）、查看已结账订单、关闭；退出系统。
3、用户界面实现了菜单的查看，查询，新建订单，选择餐桌，保存订单，增加菜品，退出。

c#语言实现在线点餐系统，具体功能如下图

登录界面

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 menusystemwss
{

 public partial class form1 : form
 {

 int dlsf=0;
 /* sqlconnection sqlcon;
 sqlcommand sqlcom;
 sqldatareader sqlsdr;*/


 baseinfo baseinfo = new baseinfo();//
 baseinfo.gkinfo gkinfo = new baseinfo.gkinfo();//
 public form1()
 {
 initializecomponent();

 }
 public void dengluzt()
 {
 dataset ds = null;
 gkinfo.gk_num = textbox1.text.trim();
 ds = baseinfo.denglu(gkinfo, "db_menu");
 gkinfo.gk_zt = 1;
 gkinfo.gk_apw = gkinfo.gk_pw;
 gkinfo.gk_name = ds.tables[0].rows[0][1].tostring().trim();
 baseinfo.updatgk(this.gkinfo);
 }
 private void button1_click(object sender, eventargs e)
 {
 if (radiobutton1.checked) dlsf = 1;
 if (radiobutton2.checked) dlsf = 2;
 if (textbox1.text.trim() == "")
 {
 label3.text = "账号不能为空";
 textbox1.focus();
 return;
 }
 else
 if (textbox2.text.trim() == "")
 {
 label3.text = "密码不能为空";
 textbox1.focus();
 return;
 }
 else
 if (dlsf == 2)
 {
 
 try
 {
 dataset ds = null;
 gkinfo.gk_num = textbox1.text.trim();
 gkinfo.gk_pw = textbox2.text.trim();
 ds = baseinfo.denglu(gkinfo, "db_menu");
 if (ds== null||ds.tables.count == 0||(ds.tables.count == 1 && ds.tables[0].rows.count == 0))
 {
 messagebox.show("用户名错误！");
 return;
 }
 else
 if (ds.tables[0].rows[0][2].tostring().trim() != textbox2.text.trim())
 { messagebox.show("密码错误"); }
 else
 {
 messagebox.show("登陆成功！");
 dengluzt();
 gkfm fm = new gkfm();
 fm.add (convert.tostring(textbox1.text));
 fm.show();
 //this.hide();
 }
 }
 catch (exception ee)
 {
 messagebox.show(ee.message);
 }

 

 }
 else
 if (dlsf == 1)
 {
 if (textbox1.text.trim() == "1" && textbox2.text.trim() == "1")
 {
 messagebox.show("登录成功");
 sjfm fm = new sjfm();
 fm.show();
 // this.hide();
 }
 else { messagebox.show("账号或密码错误！请重新输入！"); return; }
 }

 }
 private void label3_click(object sender, eventargs e)
 {
 zcfm fm = new zcfm();
 fm.show();
 this.hide();
 }
 }
}

注册界面

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 menusystemwss
{
 public partial class zcfm : form
 {
 baseinfo baseinfo = new baseinfo();//
 baseinfo.gkinfo gkinfo = new baseinfo.gkinfo();//
 /* sqlconnection sqlcon;
 sqlcommand sqlcom;*/
 public zcfm()
 {
 initializecomponent();
 }

 private void label6_click(object sender, eventargs e)
 {
 form1 fm = new form1();
 fm.show();
 this.hide();
 }

 private void button1_click(object sender, eventargs e)
 {
 if (textbox1.text.trim() == "" || textbox1.text.length != 11)
 {
 messagebox.show( "手机号错误，请规范填写");
 }
 else
 if (textbox2.text.trim() == "")
 {
 messagebox.show("用户名错误，请规范填写4-8位");
 }
 else
 if (textbox3.text.trim() == "" || textbox3.text.length < 6 || textbox3.text.length > 8)
 {
 messagebox.show("密码错误，请规范填写6-8位！");
 }
 else
 if (textbox4.text.trim() == "")
 {
 messagebox.show("密码错误，请规范填写6-8位!");
 }
 else
 if (textbox3.text.trim() != textbox4.text.trim())
 {
 messagebox.show("两次输入密码必须一致!");
 }
 else
 {

 try
 {
  gkinfo.gk_num = textbox1.text.trim();
  gkinfo.gk_name = textbox2.text.trim();
  gkinfo.gk_pw = textbox3.text.trim();
  gkinfo.gk_apw = textbox4.text.trim();
  gkinfo.gk_zt = 0;
  int id = baseinfo.addgk(gkinfo);
  messagebox.show("注册成功！", "成功提示！", messageboxbuttons.ok, messageboxicon.information);
 }
 catch (exception ee){ messagebox.show(ee.message); }
 }
 }

 private void zcfm_load(object sender, eventargs e)
 {

 }
 }
}

商家界面：

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 menusystemwss
{
 public partial class sjfm : form
 {
 public sjfm()
 {
 initializecomponent();
 }

 private void button1_click(object sender, eventargs e)
 {
 menushop fm = new menushop();
 fm.show();
 }

 private void button3_click(object sender, eventargs e)
 {
 application.exit();
 }

 private void button2_click(object sender, eventargs e)
 {
 glfm fm = new glfm();
 fm.show();
 }
 }
}

菜单管理

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 menusystemwss 
{
 public partial class menushop : form
 {
 baseinfo baseinfo = new baseinfo();
 baseinfo.menuinfo stockinfo = new baseinfo.menuinfo();
 int kj_bz = 0;//控件状态标志
 public menushop()
 {
 initializecomponent();
 }

 private void cleartext()
 {
 textboxnum.text = string.empty;
 textboxname.text = string.empty;
 textboxgg.text = string.empty;
 textboxlx.text = string.empty;
 textboxdj.text = string.empty;
 }

 private void cancelenabled()
 {
 groupbox1.enabled = false;
 tlbtnadd.enabled = true;
 btnedit.enabled = true;
 btndelete.enabled = true;
 btnsave.enabled = false;
 btncancel.enabled = false;
 }
 private void loadenabled()
 {
 groupbox1.enabled = false;
 tlbtnadd.enabled = true;
 btnedit.enabled = true;
 btndelete.enabled = true;
 btnsave.enabled = false;
 btncancel.enabled = false;
 }
 private void editenabled()
 {
 groupbox1.enabled = true;
 tlbtnadd.enabled = false;
 btnedit.enabled = false;
 btndelete.enabled =false;
 btnsave.enabled = true;
 btncancel.enabled = true;
 }
 private void addenabled()
 {
 textboxdj.text = "";
 textboxgg.text = "";
 textboxnum.text = "";
 textboxname.text = "";
 textboxlx.text = "";
 groupbox1.enabled = true;
 tlbtnadd.enabled = false;
 btnedit.enabled = false;
 btndelete.enabled = false;
 btnsave.enabled = true;
 btncancel.enabled = true;
 }
 private void menushop_load(object sender, eventargs e)
 {
 this.loadenabled();
 datagridview1.datasource = baseinfo.getallmenu("db_menu").tables[0].defaultview;//展示菜品信息
 this.setdatagridview1headtext();
 }
 private void setdatagridview1headtext()
 {
 datagridview1.columns[0].headertext = "菜品编号";
 datagridview1.columns[1].headertext = "菜品名称";
 datagridview1.columns[2].headertext = "菜品规格";
 datagridview1.columns[3].headertext = "菜品类型";
 datagridview1.columns[4].headertext = "菜品价格";
 }
 private void datagridview1_cellclick(object sender, datagridviewcelleventargs e)
 {
 textboxnum.text = this.datagridview1[0, datagridview1.currentcell.rowindex].value.tostring();//显示菜品编号
 textboxname.text = this.datagridview1[1, datagridview1.currentcell.rowindex].value.tostring();//显示菜品全称
 textboxgg.text = this.datagridview1[2, datagridview1.currentcell.rowindex].value.tostring();//显示菜品规格
 textboxlx.text = this.datagridview1[3, datagridview1.currentcell.rowindex].value.tostring();//显示菜品类型
 textboxdj.text = this.datagridview1[4, datagridview1.currentcell.rowindex].value.tostring();//显示菜品单价
 }

 public void labletime()
 {
 labelsj.text = system.datetime.now.tostring();
 }
 private void timer1_tick(object sender, eventargs e)
 {
 labletime();
 }

 private void tlbtnexit_click(object sender, eventargs e)
 {
 this.close();
 //application.exit();
 }

 private void btndelete_click(object sender, eventargs e)
 {
 if (textboxnum.text.trim() == string.empty)
 {
 messagebox.show("删除--菜品数据--失败！", "错误提示！", messageboxbuttons.ok, messageboxicon.error);
 return;
 }

 stockinfo.menu_num = textboxnum.text.trim();
 int id = baseinfo.deletemenu(stockinfo);
 messagebox.show("删除--库存商品数据--成功！", "成功提示！", messageboxbuttons.ok, messageboxicon.information);
 datagridview1.datasource = baseinfo.getallmenu("db_menu").tables[0].defaultview;
 this.setdatagridview1headtext();
 this.cleartext();//清空文本框
 }

 private void btnsave_click(object sender, eventargs e)
 {
 if (kj_bz == 0)
 {
 try
 {
  //添加数据
  stockinfo.menu_num =textboxnum.text;
  stockinfo.menu_name = textboxname.text;
  stockinfo.menu_gg = textboxgg.text;
  stockinfo.menu_lx= textboxlx.text;
  stockinfo.menu_dj = float.parse( textboxdj.text.trim());
  //执行添加操作
  int id = baseinfo.addmenu(stockinfo);
  messagebox.show("新增--库存商品数据--成功！", "成功提示！", messageboxbuttons.ok, messageboxicon.information);
 }
 catch (exception ex)
 {
  messagebox.show(ex.message, "错误提示", messageboxbuttons.ok, messageboxicon.error);
 }
 }
 else
 {
 //修改数据
 stockinfo.menu_num = textboxnum.text;
 stockinfo.menu_name = textboxname.text;
 stockinfo.menu_gg = textboxgg.text;
 stockinfo.menu_lx = textboxlx.text;
 stockinfo.menu_dj = float.parse(textboxdj.text.trim());
 //执行修改操作
 int id = baseinfo.updatemenu(stockinfo);
 messagebox.show("修改--库存商品数据--成功！", "成功提示！", messageboxbuttons.ok, messageboxicon.information);
 }
 datagridview1.datasource = baseinfo.getallmenu("db_menu").tables[0].defaultview;
 this.setdatagridview1headtext();
 this.cancelenabled();//设置各个按钮的可用状态
 }

 private void btnfind_click(object sender, eventargs e)
 {
 if (tlcmbstocktype.text == string.empty)
 {
 messagebox.show("查询类别不能为空！", "错误提示！", messageboxbuttons.ok, messageboxicon.error);
 tlcmbstocktype.focus();
 return;
 }
 else
 if (tlcmbstocktype.text.trim() == "全部")
 {
 datagridview1.datasource = baseinfo.getallmenu("db_menu").tables[0].defaultview;
 this.setdatagridview1headtext();
 return;
 }
 else
 {
 dataset ds = null;
 stockinfo.menu_lx = tlcmbstocktype.text;
 ds = baseinfo.findmenubylx(stockinfo, "db_menu");
 datagridview1.datasource = ds.tables[0].defaultview;
 this.setdatagridview1headtext();
 }
 }

 private void btncancel_click(object sender, eventargs e)
 {
 this.cancelenabled();
 }

 

 private void btnedit_click(object sender, eventargs e)
 {
 kj_bz = 1;
 this.editenabled();
 }

 private void tlbtnadd_click(object sender, eventargs e)
 {
 this.addenabled();
 kj_bz = 0;
 }

 
 }
}

订单管理

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 menusystemwss
{
 public partial class glfm : form
 {
 baseinfo baseinfo = new baseinfo();
 baseinfo.ddinfo dd = new baseinfo.ddinfo(); 
 public glfm()
 {
 initializecomponent();
 }

 private void glfm_load(object sender, eventargs e)
 {
 textboxddxq.enabled = false;
 datagridview1.datasource = baseinfo.getalldd("db_dd").tables[0].defaultview;//展示订单信息
 this.setdatagridview1headtext();
 }
 private void setdatagridview1headtext()
 {
 datagridview1.columns[0].headertext = "桌号";
 datagridview1.columns[1].headertext = "顾客手机号";
 datagridview1.columns[2].headertext = "订单详情";
 datagridview1.columns[3].headertext = "订单总价";
 datagridview1.columns[4].headertext = "订单时间";
 }

 private void toolstripbutton1_click(object sender, eventargs e)
 {
 if (comboboxzh.text == string.empty)
 {
 messagebox.show("查询类别不能为空！", "错误提示！", messageboxbuttons.ok, messageboxicon.error);
 comboboxzh.focus();
 return;
 }
 else
 if (comboboxzh.text.trim() == "全部")
 {
 datagridview1.datasource = baseinfo.getalldd("db_dd").tables[0].defaultview;
 return;
 }
 if (comboboxzh.text.trim() == "已结账订单")
 {
 datagridview1.datasource = baseinfo.getallsydd("db_sydd").tables[0].defaultview;
 //labelxfzj.text = baseinfo.getallddsy("dd_sydd").tostring();
 return;
 }
 else
 {
 dataset ds = null;
 dd.dd_num = int.parse(comboboxzh.text);
 ds = baseinfo.findddbyzh(dd, "db_dd");
 datagridview1.datasource = ds.tables[0].defaultview;
 this.setdatagridview1headtext();
 if (ds == null || ds.tables.count == 0 || (ds.tables.count == 1 && ds.tables[0].rows.count == 0))
 {
  textboxddxq.text = "";
 }
 else
 {
  textboxddxq.text = ds.tables[0].rows[0][2].tostring().trim();
 }
 }
 }
 public void yjdd()
 {
 datagridview1.datasource = baseinfo.getalldd("db_sydd").tables[0].defaultview;
 setdatagridview1headtext();
 }

 private void datagridview1_cellclick(object sender, datagridviewcelleventargs e)
 {
 comboboxzh.text = this.datagridview1[0, datagridview1.currentcell.rowindex].value.tostring();
 textboxddxq.text = this.datagridview1[2, datagridview1.currentcell.rowindex].value.tostring();
 labelxfzj.text = "本次消费总价为:" + this.datagridview1[3, datagridview1.currentcell.rowindex].value.tostring();
 }

 private void exitbtn_click(object sender, eventargs e)
 {
 this.close();
 }

 private void toolstripbutton2_click(object sender, eventargs e)
 {
 if (comboboxzh.text.trim() != "")
 {
 dd.dd_num = int.parse(comboboxzh.text.trim());
 dd.zd_num = this.datagridview1[1, datagridview1.currentcell.rowindex].value.tostring();
 dd.dd_name = this.datagridview1[2, datagridview1.currentcell.rowindex].value.tostring();
 dd.dd_zj= float.parse(this.datagridview1[3, datagridview1.currentcell.rowindex].value.tostring());
 dd.dd_time = this.datagridview1[4, datagridview1.currentcell.rowindex].value.tostring();
 baseinfo.bcdd(dd);
 baseinfo.deletedd(dd);
 messagebox.show("结账完成！");
 datagridview1.datasource = baseinfo.getalldd("db_dd").tables[0].defaultview;
 this.setdatagridview1headtext();
 }
 else
 {
 messagebox.show("请选择正确的桌号！");
 return ;
 }
 }
 }
}

用户界面

using menusystemwss;
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 menusystemwss
{
 public partial class gkfm : form
 {
 baseinfo baseinfo = new baseinfo();
 baseinfo.gkinfo gkinfo = new baseinfo.gkinfo();
 baseinfo.menuinfo menu = new baseinfo.menuinfo();
 baseinfo.ddinfo ddinfo = new baseinfo.ddinfo();
 public double xfzj = 0;//消费总价
 public string yhsj = "";//用户手机号
 public int qxzt = 0;//点击取消时的状态
 public gkfm()
 {
 initializecomponent();
 }

 private void gkfm_load(object sender, eventargs e)
 {
 datagridview1.datasource =baseinfo.getallmenu("db_menu").tables[0].defaultview;//展示菜品信息
 datagridview1.readonly = true;
 this.setdatagridview1headtext();
 load_enable();
 }

 public void load_enable()
 {
 cancelall_enable();
 dataset ds = null;
 ddinfo.zd_num = yhsj;
 ds = baseinfo.findddbyzcnum(ddinfo, "db_dd");
 if (ds == null || ds.tables.count == 0 || (ds.tables.count == 1 && ds.tables[0].rows.count == 0))
 {
 combobox1.enabled = true;
 tlbtnadd.enabled = true;
 }
 else {
 jcbtn.enabled = true;
 combobox1.text= ds.tables[0].rows[0][0].tostring().trim();
 textboxxq.text = ds.tables[0].rows[0][2].tostring().trim();
 textboxzj.text = ds.tables[0].rows[0][3].tostring().trim();
 }
 if (textboxzj.text.trim() != "")
 {
 xfzj = convert.todouble(textboxzj.text.trim());
 }
 else
 {
 xfzj = 0;
 }
 if (textboxxq.text != "") qxzt = 1;
 }

 public void cancelall_enable()//关闭所有的控件
 {
 tlbtnadd.enabled = false;
 btnsave.enabled = false;
 btncancel.enabled = false;
 jcbtn.enabled = false;
 combobox1.enabled = false;
 textboxlx.enabled = false;
 textboxdj.enabled = false;
 textboxname.enabled = false;
 button1.enabled = false;
 textboxzj.enabled = false;
 textboxxq.enabled = false;
 }

 public void jc_enable()
 {
 btncancel.enabled = true;
 btnsave.enabled = true;
 button1.enabled = true;
 }

 public void add_enable()
 {
 tlbtnadd.enabled = false;
 btnsave.enabled = true;
 btncancel.enabled = true;
 button1.enabled = true;
 
 }

 public void cancel_enable()
 {
 if (qxzt == 0)
 {
 cancelall_enable();
 tlbtnadd.enabled = true;
 combobox1.enabled = true;
 xfzj = 0;
 textboxxq.text = "";
 }
 else
 {
 btnsave.enabled = false;
 btncancel.enabled = false;
 }
 }


 public void labletime()
 {
 labeltime.text = system.datetime.now.tostring();
 }
 private void timer1_tick(object sender, eventargs e)
 {
 labletime();
 }
 private void setdatagridview1headtext()
 {
 datagridview1.columns[0].headertext = "菜品编号";
 datagridview1.columns[1].headertext = "菜品名称";
 datagridview1.columns[2].headertext = "菜品规格";
 datagridview1.columns[3].headertext = "菜品类型";
 datagridview1.columns[4].headertext = "菜品价格";
 }

 
 public void add(string strgk)
 {
 dataset ds = null;
 yhsj = strgk;
 gkinfo.gk_num = strgk;
 ds = baseinfo.denglu1(gkinfo, "db_menu");
 label1.text = ds.tables[0].rows[0][1].tostring().trim() + "顾客您好 欢迎光临小帅饭店"; //**先生
 }

 private void btnfind_click(object sender, eventargs e)
 {
 if (toolstripcombobox1.text == string.empty)
 {
 messagebox.show("查询类别不能为空！", "错误提示！", messageboxbuttons.ok, messageboxicon.error);
 toolstripcombobox1.focus();
 return;
 }
 else
 if (toolstripcombobox1.text.trim() == "全部")
 {
 datagridview1.datasource = baseinfo.getallmenu("db_menu").tables[0].defaultview;
 this.setdatagridview1headtext();
 return;
 }
 else
 {
 dataset ds = null;
 menu.menu_lx = toolstripcombobox1.text;
 ds = baseinfo.findmenubylx(menu, "db_menu");
 datagridview1.datasource = ds.tables[0].defaultview;
 this.setdatagridview1headtext();
 }
 }
 
 private void toolstrip1_itemclicked(object sender, toolstripitemclickedeventargs e)
 {

 }

 private void tlbtnadd_click(object sender, eventargs e)
 {
 messagebox.show("请选择桌号！");
 add_enable();
 }

 private void btncancel_click(object sender, eventargs e)
 {
 cancel_enable();
 }

 private void datagridview1_cellclick(object sender, datagridviewcelleventargs e)
 {
 textboxname.text = this.datagridview1[1, datagridview1.currentcell.rowindex].value.tostring();//显示菜品全称
 textboxlx.text = this.datagridview1[3, datagridview1.currentcell.rowindex].value.tostring();//显示菜品类型
 textboxdj.text = this.datagridview1[4, datagridview1.currentcell.rowindex].value.tostring();//显示菜品价格
 }

 private void tlbtnexit_click(object sender, eventargs e)
 {
 application.exit();
 }

 private void button1_click(object sender, eventargs e)
 {
 textboxxq.text += textboxname.text.trim() + "*1; ";
 //listview1 .items.add(textboxname.text.trim()+"*1;");
 xfzj += convert.todouble(textboxdj.text.trim());
 textboxzj.text = xfzj.tostring();
 }

 private void btnsave_click(object sender, eventargs e)
 {
 if (combobox1.text == "") { messagebox.show("桌号不能为空！请选择桌号！");return; }
 string strlist=textboxxq.text.trim() ;
 /* for (int i = 0; i < listview1.items.count; i++)
 {
  listviewitem item = listview1.items[i];
  for (int j = 0; j < item.subitems.count; j++)
  {
  strlist += item.subitems[j].text;
  }
 }*/
 if (qxzt == 0)
 {
 try
 {
  ddinfo.dd_num = convert.toint32(combobox1.selecteditem);
  ddinfo.zd_num = yhsj;
  ddinfo.dd_name = strlist;
  ddinfo.dd_zj = float.parse(textboxzj.text);
  ddinfo.dd_time = system.datetime.now.tostring().trim();
  int id = baseinfo.adddd(ddinfo);
  messagebox.show("新增订单成功！", "成功提示！", messageboxbuttons.ok, messageboxicon.information);
 }
 catch (exception ex)
 {
  messagebox.show(ex.message, "错误提示", messageboxbuttons.ok, messageboxicon.error);
 }
 }
 else
 {
 ddinfo.dd_num = convert.toint32(combobox1.selecteditem);
 ddinfo.zd_num = yhsj;
 ddinfo.dd_name = strlist;
 ddinfo.dd_zj = float.parse(textboxzj.text);
 int id = baseinfo.updatedd(ddinfo);
 messagebox.show("菜品添加成功！");

 }
 ////listview1.clear();
 qxzt = 1;
 cancelall_enable();
 jcbtn.enabled = true;
 }

 private void jcbtn_click(object sender, eventargs e)
 {
 jc_enable();
 }

 private void combobox1_selectedindexchanged(object sender, eventargs e)
 {
 
 dataset ds = null;
 ddinfo.dd_num = int.parse(combobox1.text.trim());
 ds = baseinfo.findddbyzh(ddinfo, "db_dd");
 if (ds == null || ds.tables.count == 0 || (ds.tables.count == 1 && ds.tables[0].rows.count == 0))
 {
 combobox1.enabled = false;
 }
 // else { messagebox.show("桌号选择错误！请重新选择");combobox1.text = ""; return; }
 }
 }
}

还有两个类文件，可在项目中查看。
部分代码参考我们学的课本上的源代码，代码只是大作水平，仅供参考学习。

更多学习资料请关注专题《管理系统开发》。

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。