c#连接access数据库

 1 using System;
 2 using System.Data;
 3 using System.Data.OleDb;
 4 /**
 5  * @author Donie
 6  */
 7 namespace mono_csharp
 8 {
 9     class MainClass
10     {
11         public static void Main (string[] args)
12         {
13             //创建access数据库连接
14             string strConnection="provider=microsoft.jet.oledb.4.0;data source=./Database.mdb";
15             //创建sql语句
16             string sql="select oldtext from md5";
17             //new 一个数据库连接
18             OleDbConnection objConnection=new OleDbConnection(strConnection);
19             //得到command对象
20             OleDbCommand accessComm = new OleDbCommand(sql,objConnection);
21             //打开数据库连接
22             objConnection.Open();
23             //执行sql语句得到 Reader对象
24             OleDbDataReader  _reader = accessComm.ExecuteReader();
25             //从reader中拿出数据  并打印出来
26             while(_reader.Read())
27             {
28                 Console.WriteLine(_reader.GetString(0).ToString()); 
29             }
30 
31             //关闭数据库连接
32             objConnection.Close(); 
33 
34         }
35     }
36 }