using System;
using System.Collections.Generic;

using (FileStream fs = File.OpenRead(path))
{
    byte[] b = new byte[1024];

/// <summary>
/// 打开MDI窗体,同一个窗体只能运行一个实例
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="parent"></param>

protected override void WndProc(ref Message msg)
{
        const int WM_SYSCOMMAND = 0x0112;

using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\\DB\\db1.mdb;Persist Security Info=True"))
{
    conn.Open();

dataGridView1.AutoGenerateColumns = false;//只显示自定义列
dataGridView1.RowHeadersVisible = false; //去掉最左边空白列

dataGridView1.RowHeadersWidthSizeMode = DataGridViewRowHeadersWidthSizeMode.DisableResizing;//禁止手工调整标题行高度