餐厅项目查询

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;
using System.Data.SqlClient;

namespace 餐厅
{
public partial class Form1 : Form
{

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
LoadDeskInfoByDelFlag(0);

}

private void LoadDeskInfoByDelFlag(int p)
{
//新建集合
List<DeskInfo> list = new List<DeskInfo>();
//数据库字符串
string str = "Data Source=.;Initial Catalog=mysql;Integrated Security=True";
//sql语句，flag为0的餐桌
string sql = "select DeskId,DeskName,DeskNamePinYin,DeskNum from DeskInfo where DeskDelFlag = " + p;
//string sql = "select * from DeskInfo";
SqlConnection con = new SqlConnection(str);
con.Open();
SqlCommand cmd = new SqlCommand(sql, con);
//cmd.reader为查询
SqlDataReader reader = cmd.ExecuteReader();
//判断是否读取了一行
if (reader.HasRows)
{
//当读取的时候
while (reader.Read())
{
//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
DeskInfo dk = new DeskInfo();
dk.DeskId = Convert.ToInt32(reader["DeskId"]);
dk.DeskName = reader["DeskName"].ToString();
dk.DeskNamePinYin = reader["DeskNamePinYin"].ToString();
dk.DeskNum = reader["DeskNum"].ToString();
//把属性添加进list
list.Add(dk);
}

}
//禁止自动生成列，没有delflag那一列了。
dgv.AutoGenerateColumns = false;
//绑定数据
dgv.DataSource = list;

//关闭数据库各项
con.Dispose();
cmd.Dispose();
reader.Dispose();
}
}
}