C# 链接 Access数据库

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.OleDb;

namespace 链接数据库
{

    class Access
    {
        OleDbConnection oleDb = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\王宗钦\Desktop\first.mdb");

        public Access()
        {
            oleDb.Open();
        }

        public static void Show(DataRow a)
        {
            Console.WriteLine("{0} | {1} | {1} | {2} | {3} | {4} | {5}", a[0], a[1], a[2], a[3], a[4], a[5]);
        }

        public void Get()
        {
            string sql = "SELECT * FROM 表1";
            OleDbDataAdapter dbDateAdapter = new OleDbDataAdapter(sql, oleDb);
            DataTable dt = new DataTable();
            dbDateAdapter.Fill(dt);
            foreach(DataRow item in dt.Rows)
            {
                Show(item);               
            }

            Console.WriteLine("--------------------------------------\n");


        }

        public void Find()
        {
            string sql = "SELECT * FROM 表1 " +
                         "WHERE 班级='17数媒02' "+
                         "AND 分数>80 ";
            OleDbDataAdapter dbDataAdapter = new OleDbDataAdapter(sql, oleDb);
            DataTable dt = new DataTable();
            dbDataAdapter.Fill(dt);
            foreach (DataRow item in dt.Rows)
                Show(item);
            Console.WriteLine("-----------------------------------------------------\n");
        }

        public bool Add()
        {
            string sql = "insert into 表1 (姓名,性别,班级,宿舍,分数)" +
                "values ('gxz','男','17数媒02','114',50)";
            OleDbCommand oleDbCommand = new OleDbCommand(sql, oleDb);

            int i = oleDbCommand.ExecuteNonQuery();

            string aa = "select * from 表1";

            OleDbDataAdapter a = new OleDbDataAdapter(aa, oleDb);

            DataTable dt = new DataTable();

            a.Fill(dt);

            foreach (DataRow item in dt.Rows)
                Show(item);

            Console.WriteLine("---------------------------------------------------------\n");

            return i > 0;

        }

        public bool Del()
        {
            string sql = "delete from 表1 " +
                "where 姓名='sck' ";
            OleDbCommand olc = new OleDbCommand(sql, oleDb);
            int i = olc.ExecuteNonQuery();
            string a = "select * from 表1";
            OleDbDataAdapter oldd = new OleDbDataAdapter(a, oleDb);
            DataTable dt = new DataTable();
            oldd.Fill(dt);
            foreach (DataRow item in dt.Rows)
                Show(item);
            Console.WriteLine("--------------------------------------------\n");
            return i > 0;
        }

        public bool update()
        {
            string sql = "update 表1 set 分数=20,宿舍='666' where 姓名='wzq' ";
            OleDbCommand oldc = new OleDbCommand(sql, oleDb);
            int i = oldc.ExecuteNonQuery();
            string a = "select * from 表1";
            OleDbDataAdapter oldd = new OleDbDataAdapter(a, oleDb);
            DataTable dt = new DataTable();
            oldd.Fill(dt);
            foreach (DataRow item in dt.Rows)
                Show(item);
            return i > 0;
        }

    }

    class Program
    {
        static void Main(string[] args)
        {
            Access a = new Access();
            a.Get();
            a.Find();
            a.Add();
            a.Del();
            a.update();
            Console.ReadKey();
        }
    }
}