using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Data.Sql;
using System.Data.SqlClient;
namespace WindowsFormsApplication1
{
  class DataDase
  {
    public string Con = "";
    public DataTable DATA_SQL(string SQL)
    {
      SqlConnection myconn = new SqlConnection(Con);
      //Con為數(shù)據(jù)庫(kù)連接字段
      SqlDataAdapter myadapter = new SqlDataAdapter(SQL, myconn);
      DataSet mydataset = new DataSet();
      myadapter.Fill(mydataset);
      return mydataset.Tables[0];
    }
    public void RUN_SQL(string SQL)
    {
      SqlConnection myconn = new SqlConnection(Con);
      SqlDataAdapter myadapter = new SqlDataAdapter(SQL, myconn);
      DataSet mydataset = new DataSet();
      myadapter.Fill(mydataset);
    }
  }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
    }
    private void button1_Click(object sender, EventArgs e)
    {
      checkedListBox1.Items.Clear();
      DataDase database = new DataDase();
      database.Con = @"Data Source = 192.168.1.3; Initial Catalog = zxl; User Id = sa; Password = zxl; ";
      DataTable dt,t;
      t = database.DATA_SQL("select * from 學(xué)生信息表 where c#='" + textBox1.Text + "'");
      textBox2.Text= t.Rows[0][1].ToString();
      if (t.Rows[0][3].ToString().Equals("1"))
      {
        radioButton1.Checked=true;
      }
      else {
        radioButton2.Checked = true;
      }
      dt = database.DATA_SQL("SELECT 愛好表.love FROM 學(xué)生信息表 INNER JOIN 學(xué)生愛好表 ON 學(xué)生信息表.c# = 學(xué)生愛好表.c# INNER JOIN 愛好表 ON 學(xué)生愛好表.s# = 愛好表.s# WHERE (學(xué)生信息表.c# = '"+textBox1.Text+"')");
      for (int i = 0; i < dt.Rows.Count; i++)
      {
        checkedListBox1.Items.Add(dt.Rows[i][0]);
      }
    }
  }
}

create database zxl
use zxl
----------------------------------------------
create table 學(xué)生信息表(
c# char(5) primary key,
num char(11) not null,
name char(6) not null,
sex int
)
create table 愛好表(
s# char(5) primary key,
love char(4) not null
)
create table 學(xué)生愛好表(
s# char(5) references 愛好表(s#),
c# char(5) references 學(xué)生信息表(c#),
code char(10) not null,
primary key(s#,c#)
)
----------------------------------------------
insert into 學(xué)生信息表 values('1','111111','zhang',1)
insert into 學(xué)生信息表 values('2','222222','wang',0)
insert into 學(xué)生信息表 values('3','333333','li',1)
----------------------------------------------
insert into 愛好表 values('11','學(xué)習(xí)')
insert into 愛好表 values('22','籃球')
insert into 愛好表 values('33','時(shí)尚')
insert into 愛好表 values('44','游戲')
insert into 愛好表 values('55','購(gòu)物')
insert into 愛好表 values('66','其他')
----------------------------------------------
insert into 學(xué)生愛好表 values('11','1','code')
insert into 學(xué)生愛好表 values('22','1','code')
insert into 學(xué)生愛好表 values('33','1','code')
insert into 學(xué)生愛好表 values('44','1','code')
insert into 學(xué)生愛好表 values('55','1','code')
insert into 學(xué)生愛好表 values('66','1','code')
insert into 學(xué)生愛好表 values('11','2','code')
insert into 學(xué)生愛好表 values('33','2','code')
insert into 學(xué)生愛好表 values('11','3','code')
insert into 學(xué)生愛好表 values('44','3','code')
----------------------------------------------
select love
from 學(xué)生信息表,愛好表,學(xué)生愛好表
where 學(xué)生愛好表.c# = 學(xué)生信息表.c# and 學(xué)生愛好表.s# = 愛好表.s# and 學(xué)生信息表.c#='3'