DataGridView中直接修改数据的步骤详解

using System;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace Test03
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        SqlConnection conn;
        SqlDataAdapter adapter;
        private void button1_Click(object sender, EventArgs e)
        {
            conn = new SqlConnection("server=.;database=db_16;uid=sa;pwd=123456");//连接数据库
            SqlDataAdapter sda = new SqlDataAdapter("select * from tb_emp",conn);
            DataSet ds = new DataSet();
            sda.Fill(ds);
            dataGridView1.DataSource = ds.Tables[0];//绑定数据源到datagridView
            dataGridView1.RowHeadersVisible = false;//隐藏首列
            for (int i = 0; i < dataGridView1.ColumnCount;i++ )
            {
                dataGridView1.Columns[i].Width = 84;
            }
            button1.Enabled = false;
            dataGridView1.Columns[0].ReadOnly = true;
        }