C#实现在线点餐系统

超、凢脫俗 2023-06-16 08:05 32阅读 0赞

*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*

***附下载链接***（[传送门][Link 1]）

**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**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NzMyNw_size_16_color_FFFFFF_t_70]

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**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NzMyNw_size_16_color_FFFFFF_t_70 1]

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：**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NzMyNw_size_16_color_FFFFFF_t_70 2]

**菜单管理**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NzMyNw_size_16_color_FFFFFF_t_70 3]

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**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NzMyNw_size_16_color_FFFFFF_t_70 4]

**用户界面**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NzMyNw_size_16_color_FFFFFF_t_70 5]

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。

**转载请附上本页链接，谢谢！**

[Link 1]: https://download.csdn.net/download/weixin_43977327/12492378
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