WindowsForm 增 删 查 改

create database JinXiaoCun
go
use JinXiaoCun
go
create table users
(uname varchar(20)not null,
upass varchar(20)not null
)
go
insert into users values (‘sa‘,‘123‘)
insert into users values(‘sa1‘,‘123‘)
select*from users

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.Data.SqlClient;

namespace WindowsFormsApplication7
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            SqlConnection conn = new SqlConnection("server=.;database=data1220;user=sa;pwd=");
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "select *from users";
            SqlDataReader dr = cmd.ExecuteReader();
            //开始构建listview表头
            listView1.Columns.Clear();
            listView1.Columns.Add("编号");
            listView1.Columns.Add("用户名");
            listView1.Columns.Add("密码");

            //读取数据库，根据数据库内容往listview中添加行数据
            listView1.Items.Clear();
            while (dr.Read())
            {
                ListViewItem lt = new ListViewItem();
                lt.Text = dr["code"].ToString();
                lt.SubItems.Add(dr["uname"].ToString());
                lt.SubItems.Add(dr["upass"].ToString());

                listView1.Items.Add(lt);
            }
            conn.Close();
        }
    }
}