随笔：

（1） 命名空间

using System.Data.OleDb;

（2） 连接字符串

private staticstring connStr = @"Provider= Microsoft.Ace.OLEDB.12.0;Data Source = d:\login.accdb";

注意：

a、DataSource = 数据库存放的路径（这里数据库放到了D盘目录下）
b、 2003版本的Access数据库链接字符串：

privatestatic stringconnStr =@"Provider = Microsoft.Jet.OLEDB.4.0;DataSource = d:\login.mdb"; 2007版本的Access数据库链接字符串：privatestaticstring connStr =@"Provider= Microsoft.Ace.OLEDB.12.0;Data Source = d:\login.accdb";

（3） 建立连接：

OleDbConnection tempconn =new OleDbConnection(connStr);

（4） 使用OleDbCommand类来执行Sql语句：

OleDbCommand cmd = new OleDbCommand(sql, tempconn); tempconn.Open(); cmd.ExecuteNonQuery();

栗子（工具类）：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Data.OleDb;using System.Windows.Forms;using System.Data;namespace test{ class AccessHelper { private static string connStr = @"Provider = Microsoft.Ace.OLEDB.12.0;Data Source = d:\login.accdb"; public static OleDbConnection GetConn() { OleDbConnection tempconn = new OleDbConnection(connStr); MessageBox.Show(tempconn.DataSource); tempconn.Open(); MessageBox.Show(tempconn.State.ToString()); return (tempconn); } /// <summary> /// 执行增加、删除、修改指令 /// </summary> /// <param name="sql">增加、删除、修改的sql语句</param> /// <param name="param">sql语句的参数</param> /// <returns></returns> public static int ExecuteNonQuery(string sql, params OleDbParameter[] param) { using (OleDbConnection conn = new OleDbConnection(connStr)) { using (OleDbCommand cmd = new OleDbCommand(sql,conn)) { if (param != null) { cmd.Parameters.AddRange(param); } conn.Open(); return(cmd.ExecuteNonQuery()); } } } /// <summary> /// 执行查询指令，获取返回的首行首列的值 /// </summary> /// <param name="sql">查询sql语句</param> /// <param name="param">sql语句的参数</param> /// <returns></returns> public static object ExecuteScalar(string sql, params OleDbParameter[] param) { using (OleDbConnection conn = new OleDbConnection(connStr)) { using (OleDbCommand cmd = new OleDbCommand(sql, conn)) { if (param != null) { cmd.Parameters.AddRange(param); } conn.Open(); return (cmd.ExecuteScalar()); } } } /// <summary> /// 执行查询指令，获取返回的datareader /// </summary> /// <param name="sql">查询sql语句</param> /// <param name="param">sql语句的参数</param> /// <returns></returns> public static OleDbDataReader ExecuteReader(string sql, params OleDbParameter[] param) { OleDbConnection conn = new OleDbConnection(connStr); OleDbCommand cmd = conn.CreateCommand(); cmd.CommandText = sql; cmd.CommandType = CommandType.Text; if (param != null) { cmd.Parameters.AddRange(param); } conn.Open(); return (cmd.ExecuteReader(CommandBehavior.CloseConnection)); } /// <summary> /// 执行查询指令，获取返回datatable /// </summary> /// <param name="sql">查询sql语句</param> /// <param name="param">sql语句的参数</param> /// <returns></returns> public static DataTable ExecuteDatable(string sql, params OleDbParameter[] param) { using (OleDbConnection conn = new OleDbConnection(connStr)) { using (OleDbCommand cmd = new OleDbCommand(sql, conn)) { if (param != null) { cmd.Parameters.AddRange(param); } DataTable dt = new DataTable(); OleDbDataAdapter sda = new OleDbDataAdapter(cmd); sda.Fill(dt); return (dt); } } } }}

总结

以上所述是小编给大家介绍的C# 操作 access 数据库的实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！