餐桌项目删除餐桌

 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 
13 namespace 餐厅复习
14 {
15     public partial class Form1 : Form
16     {
17         public Form1()
18         {
19             InitializeComponent();
20         }
21 
22         private void Form1_Load(object sender, EventArgs e)
23         {
24             LoadDeskInfoByDelId(0);
25 
26         }
27         string str = "Data Source=.;Initial Catalog=mysql;Integrated Security=True";
28         private void LoadDeskInfoByDelId(int p)
29         {
30             //查询
31             List<DeskInfo> list = new List<DeskInfo>();
32             
33             string sql = "select * from DeskInfo where DeskDelFlag =" + p;
34             SqlConnection con = new SqlConnection(str);
35             con.Open();
36             SqlCommand cmd = new SqlCommand(sql, con);
37             SqlDataReader reader = cmd.ExecuteReader();
38             if (reader.HasRows)
39             {
40                 while (reader.Read())
41                 {
42                     list.Add(new DeskInfo()
43                                    {
44                                        DeskId = Convert.ToInt32(reader["DeskId"]),
45                                        DeskName = reader["DeskName"].ToString(),
46                                        DeskNamePinYin = reader["DeskNamePinYin"].ToString(),
47                                        DeskNum = reader["DeskNum"].ToString()
48                                    });
49                 }
50             }
51             dgv.DataSource = list;
52             dgv.Rows[0].Selected = false;
53             dgv.AutoGenerateColumns = false;
54 
55             con.Dispose();
56             cmd.Dispose();
57             reader.Dispose();
58         }
59 
60         private void btnOK_Click(object sender, EventArgs e)
61         {
62             //添加
63             string sql = string.Format("insert into DeskInfo(DeskName,DeskNamePinYin,DeskDelFlag,DeskNum) values ('{0}','{1}',0,'{2}')",txtName.Text,txtPinYin.Text,txtNum.Text);
64             SqlConnection con = new SqlConnection(str);
65             con.Open();
66             SqlCommand cmd = new SqlCommand(sql,con);
67             cmd.ExecuteNonQuery();
68             LoadDeskInfoByDelId(0);
69             con.Dispose();
70             cmd.Dispose();
71         }
72 
73         private void btnDel_Click(object sender, EventArgs e)
74         {
75             //删除
76             int delId = Convert.ToInt32(dgv.SelectedRows[0].Cells[0].Value);
77             string sql = "update DeskInfo set DeskDelFlag = 1 where DeskId = " + delId;
78             SqlConnection con = new SqlConnection(str);
79             con.Open();
80             SqlCommand cmd = new SqlCommand(sql,con);
81             cmd.ExecuteNonQuery();
82             LoadDeskInfoByDelId(0);
83 
84 
85 
86             con.Dispose();
87             cmd.Dispose();
88         }
89 
90 
91 
92     }
93 }

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原文地址：https://www.cnblogs.com/Jacklovely/p/5648432.html