隨筆：
（1） 命名空間
using System.Data.OleDb;
（2） 連接字符串
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private staticstring connStr = @"Provider= Microsoft.Ace.OLEDB.12.0;Data Source = d:\login.accdb"; |
注意：
a、DataSource = 數(shù)據(jù)庫(kù)存放的路徑（這里數(shù)據(jù)庫(kù)放到了D盤目錄下）
b、 2003版本的Access數(shù)據(jù)庫(kù)鏈接字符串：
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privatestatic stringconnStr =@"Provider = Microsoft.Jet.OLEDB.4.0;DataSource = d:\login.mdb"; 2007版本的Access數(shù)據(jù)庫(kù)鏈接字符串：privatestaticstring connStr =@"Provider= Microsoft.Ace.OLEDB.12.0;Data Source = d:\login.accdb"; |
（3） 建立連接：
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OleDbConnection tempconn =new OleDbConnection(connStr); |
（4） 使用OleDbCommand類來(lái)執(zhí)行Sql語(yǔ)句：
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OleDbCommand cmd = new OleDbCommand(sql, tempconn); tempconn.Open(); cmd.ExecuteNonQuery(); |
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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> /// 執(zhí)行增加、刪除、修改指令 /// </summary> /// <param name="sql">增加、刪除、修改的sql語(yǔ)句</param> /// <param name="param">sql語(yǔ)句的參數(shù)</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> /// 執(zhí)行查詢指令，獲取返回的首行首列的值 /// </summary> /// <param name="sql">查詢sql語(yǔ)句</param> /// <param name="param">sql語(yǔ)句的參數(shù)</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> /// 執(zhí)行查詢指令，獲取返回的datareader /// </summary> /// <param name="sql">查詢sql語(yǔ)句</param> /// <param name="param">sql語(yǔ)句的參數(shù)</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> /// 執(zhí)行查詢指令，獲取返回datatable /// </summary> /// <param name="sql">查詢sql語(yǔ)句</param> /// <param name="param">sql語(yǔ)句的參數(shù)</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); } } } }} |
總結(jié)
以上所述是小編給大家介紹的C# 操作 access 數(shù)據(jù)庫(kù)的實(shí)例代碼，希望對(duì)大家有所幫助，如果大家有任何疑問(wèn)請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)服務(wù)器之家網(wǎng)站的支持！
原文鏈接：https://www.cnblogs.com/lsy131479/archive/2018/03/26/8650515.html
