餐厅项目增加餐桌

Posted 2020-08-02 Jacklovely

 

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Threading.Tasks;
 9 using System.Windows.Forms;
10 using System.Data.SqlClient;
11 
12 namespace 餐厅
13 {
14     public partial class Form1 : Form
15     {
16 
17 
18 
19         public Form1()
20         {
21             InitializeComponent();
22         }
23 
24         private void Form1_Load(object sender, EventArgs e)
25         {
26             LoadDeskInfoByDelFlag(0);
27 
28         }
29         //数据库字符串
30         string str = "Data Source=.;Initial Catalog=mysql;Integrated Security=True";
31         private void LoadDeskInfoByDelFlag(int p)
32         {
33             //查询
34             //新建集合
35             List<DeskInfo> list = new List<DeskInfo>();
36 
37             //sql语句，flag为0的餐桌
38             string sql = "select DeskId,DeskName,DeskNamePinYin,DeskNum from DeskInfo where DeskDelFlag = " + p;
39             //string sql = "select * from DeskInfo";
40             SqlConnection con = new SqlConnection(str);
41             con.Open();
42             SqlCommand cmd = new SqlCommand(sql, con);
43             //cmd.reader为查询
44             SqlDataReader reader = cmd.ExecuteReader();
45             //判断是否读取了一行
46             if (reader.HasRows)
47             {
48                 //当读取的时候
49                 while (reader.Read())
50                 {
51                     //实例化餐桌类，为每个属性赋值，值为数据库里的值，进行类型转换
52                     DeskInfo dk = new DeskInfo();
53                     dk.DeskId = Convert.ToInt32(reader["DeskId"]);
54                     dk.DeskName = reader["DeskName"].ToString();
55                     dk.DeskNamePinYin = reader["DeskNamePinYin"].ToString();
56                     dk.DeskNum = reader["DeskNum"].ToString();
57                     //把属性添加进list
58                     list.Add(dk);
59                 }
60 
61             }
62             //禁止自动生成列，没有delflag那一列了。
63             dgv.AutoGenerateColumns = false;
64             //绑定数据
65             dgv.DataSource = list;
66 
67             //关闭数据库各项
68             con.Dispose();
69             cmd.Dispose();
70             reader.Dispose();
71         }
72 
73         private void button1_Click(object sender, EventArgs e)
74         {
75             //增加餐桌 
76             //sql语句
77             string sql = string.Format("insert into DeskInfo(DeskName, DeskNamePinYin, DeskDelFlag, DeskNum) values(‘{0}‘,‘{1}‘,0,‘{2}‘)", txtName.Text, txtPinYin.Text,txtNum.Text);
78             SqlConnection con = new SqlConnection(str);
79             con.Open();
80             SqlCommand cmd = new SqlCommand(sql, con);
81             cmd.ExecuteNonQuery();
82             LoadDeskInfoByDelFlag(0);//刷新
83 
84             con.Dispose();
85             cmd.Dispose();
86 
87         }
88     }
89 }