oledb连接access数据库示例

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            OleDbConnection conn = new OleDbConnection();
            OleDbCommand comm = new OleDbCommand();
            OleDbDataReader dr=null;
            conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + System.Environment.CurrentDirectory + "//SimpleNews.mdb";
            comm.Connection = conn;
            comm.CommandText = "select * from [login]";
            try
            {
                conn.Open();
                dr = comm.ExecuteReader();
                while (dr.Read())
                {
                    for (int i = 0; i < dr.FieldCount; i++)
                        Console.Write(dr.GetValue(i) + "  ");
                    Console.WriteLine("");
                    //dr.Close();
                }
                dr.Close();
            }
            catch (Exception err)
            {
                Console.WriteLine(err.Message);
            }
            finally
            {
                comm = null;
                conn.Close();
                comm = null;
                Console.ReadKey();
            }
        }
    }
}