利用winform 操作access 数据库

最近给师兄写了个一个程序，在winform 中利用c# 操作access 数据库，完成数据的增删查改。废话不说直接贴code

using System;

using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Data.OleDb;
using System.Data.Common;
using System.Windows.Forms;
using System.IO;
using System.Globalization;
using System.Threading;
using System.Runtime.InteropServices;



namespace WindowsFormsApplication1
{
    //public partial class Form1 : BaseFormAuto
    public partial class Form1 : Form
    {
        private string ConStr;
        OleDbConnection con;
        string currentdir = System.Environment.CurrentDirectory;
        private string ImgPath = System.Environment.CurrentDirectory + "\\tulip.jpg";
        private string recordID = "";
        int a = 10;

        public Form1()
        {
            InitializeComponent();
            //base.GetAllInitInfo(this.Controls[0]);
            set_default_values();
            //global variable
            listView1.View = View.Details;
            listView1.Clear();
            listView1.HeaderStyle = ColumnHeaderStyle.Clickable;
            listView1.FullRowSelect = true;
            listView1.GridLines = true;
            listView1.Columns.Add("ID", 70, HorizontalAlignment.Center);
            listView1.Columns.Add("ST", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("INVENTOR", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("DATE", 80, HorizontalAlignment.Left);
            listView1.Columns.Add("NUAP", 40, HorizontalAlignment.Center);
            listView1.Columns.Add("AW1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("AW2", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("AW3", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("AW4", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("AW5", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("AW6", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("AW7", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("AW8", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("API2/1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("API3/1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("API4/1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("API5/1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("API6/1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("API7/1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("API8/1", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("Other", 60, HorizontalAlignment.Center);
            listView1.Columns.Add("img", 100, HorizontalAlignment.Center);
            findTime.ShowCheckBox = true;
            findTime.Value = DateTime.Now;
            listView1.Visible = true;
            //init the database when init the form
           // init_database();
            init_database();
            update_list_view();
            update_text_rnum();
            
            bool createdNew;

            Mutex m = new Mutex(true, "YourAppName", out createdNew);

            if (!createdNew)
            {
                // app is already running…
                MessageBox.Show("Only one instance of this application is allowed at a time.");
                return;
            }





        }

        private void Form1_Load(object sender, EventArgs e)
        {


        }
        //connect date base
        private void button1_Click(object sender, EventArgs e)
        {
            db_open();
            if (con.State == ConnectionState.Open)
            {
                //MessageBox.Show("Access数据库的连接成功!", "Access数据库的连接");

            }
            else
            {
                //MessageBox.Show("Access数据库的连接失败!", "Access数据库的连接");
            }
            db_close();
            update_list_view();
            set_default_values();


        }
        //查询
        private void button2_Click(object sender, EventArgs e)
        {
            db_open();

            string str = text_id.Text;
            //MessageBox(text_aw1.Text);
            con.Close();

        }
        //退出界面
        private void button3_Click(object sender, EventArgs e)
        {

            this.Close();
        }
        //insert a record to database
        private void button4_Click(object sender, EventArgs e)
        {
            db_open();
            //String i = textBox2.Text;
            check_impty();
            StringBuilder sb = new StringBuilder();
            sb = get_sql_exp("INSERT");
            picBox.Image.Save(System.Environment.CurrentDirectory + "\\temp.png", System.Drawing.Imaging.ImageFormat.Png);
            ImgPath = System.Environment.CurrentDirectory + "\\temp.png";
            FileStream fs = new FileStream(ImgPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
            try
            {

                //FileStream fs = new FileStream(ImgPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                //File.Delete(ImgPath);
                byte[] imagebytes = new byte[fs.Length];
                BinaryReader br = new BinaryReader(fs);

                imagebytes = br.ReadBytes(Convert.ToInt32(fs.Length));
                //MessageBox.Show(sb.ToString());
                string sb1 = sb.ToString();
                OleDbCommand cmd = new OleDbCommand(sb1, con);
                cmd.Parameters.Add("img", OleDbType.Binary);
                cmd.Parameters["img"].Value = imagebytes;
                cmd.ExecuteNonQuery();
                //fs = null;
                //System.GC.Collect();
                //MessageBox.Show("One Record Insert Successfully!!!");
                //fs.Close();
                //File.Delete(ImgPath);

            }
            catch (Exception ex)
            {
                MessageBox.Show("Error found  when insert date into datebase!!!\nError:\n" + ex.Message);
                //fs.Close();
                //File.Delete(ImgPath);

            }
            fs.Close();
            File.Delete(ImgPath);
            db_close();
            update_list_view();
            update_text_rnum();

        }
        //delete all record in UVADB
        //private void button5_Click(object sender, EventArgs e)
        //{

        //    var result = MessageBox.Show("Are you sure to delete all records?", "Warning", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
        //    if (result == DialogResult.OK)
        //    {
        //        db_open();
        //        StringBuilder sql = new StringBuilder();
        //        sql.Append("delete * from UVADB");
        //        OleDbCommand cmd = new OleDbCommand(sql.ToString(), con);
        //        try
        //        {
        //            cmd.ExecuteNonQuery();

        //        }
        //        catch (Exception ex)
        //        {
        //            MessageBox.Show(ex.Message);

        //        }

        //        db_close();
        //        update_list_view();


        //    }

        //}
        //测试
        private void button6_Click(object sender, EventArgs e)
        {

        }
        //ST
        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }
        //ID
        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            string str = text_nuap.Text;

            int b = str.IndexOf("-");
            bool abc = Convert.ToBoolean(str.IndexOf("-"));
            if (str != "" && !(str.IndexOf("-") > 0))
            {
                checkNumber(str);
                try
                {
                    int a = Convert.ToInt16(str.ToString());

                    if (a < 0 || a > 8)
                    {
                        MessageBox.Show("Please input a number beteen 1 and 8!!!");
                    }
                    else
                    {
                    }
                }
                catch (Exception re)
                {
                    MessageBox.Show(re.Message);
                }
            }

        }



        private void label22_Click(object send