最新C#-连接MYSQL数据库的3种方法及示例.doc

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1、精品资料C#-连接MYSQL数据库的3种方法及示例.连接MYSQL数据库的方法及示例 方法一：using MySql.Data using MySql.Data.MySqlClient; 其他操作跟SQL是差不多,无非就是前缀变成MySql了. 补充: 下面是连接字符串,供参考. MySqlConnection con = new MySql.Data.MySqlClient.MySqlConnection(Database=testdb;Data Source=localhost;User Id=db;Password=apple;charset=utf8); con.Open(); MyS

2、qlCommand cmd = new MySqlCommand(); cmd.Connection = con; 使用MYSQL推出的MySQL Connector/Net is an ADO.NET driver for MySQL 该组件为MYSQL为ADO.NET访问MYSQL数据库设计的.NET访问组件。 安装完成该组件后，引用命名空间MySql.Data.MySqlClient; 使用命令行编译时：csc /r:MySql.Data.dll test.cs 方法二： 通过ODBC访问MYSQL数据库 访问前要先下载两个组件：和MYSQL的ODBC驱动(MySQL Connector

3、/ODBC (MyODBC) driver)目前为3.51版 安装完成后，即可通过ODBC访问MYSQL数据库 方法三： 使用CoreLab推出的MYSQL访问组件，面向.NET 安装完成后，引用命名空间：CoreLab.MySql; 使用命令编译时：csc /r:CoreLab.MySql.dll test.cs 以下为访问MYSQL数据库实例 编译指令：csc /r:CoreLab.MySql.dll /r:MySql.Data.dll test.cs using System; using System.Net; using System.Text; using CoreLab.MySq

4、l; using System.Data.Odbc; using MySql.Data.MySqlClient; class ConnectMySql public void Connect_CoreLab() string constr = User Id=root;Host=localhost;Database=qing;password=qing; MySqlConnection mycn = new MySqlConnection(constr); mycn.Open(); MySqlCommand mycm = new MySqlCommand(select * from shop,

5、mycn); MySqlDataReader msdr = mycm.ExecuteReader(); while(msdr.Read() if (msdr.HasRows) Console.WriteLine(msdr.GetString(0); msdr.Close(); mycn.Close(); public void Connect_Odbc() /string MyConString =DSN=MySQL;UID=root;PWD=qing; string MyConString = DRIVER=MySQL ODBC 3.51 Driver; + SERVER=localhost

6、; + DATABASE=test; + UID=root; + PASSWORD=qing; + OPTION=3; OdbcConnection MyConn = new OdbcConnection(MyConString); MyConn.Open(); OdbcCommand mycm = new OdbcCommand(select * from hello,MyConn); OdbcDataReader msdr = mycm.ExecuteReader(); while(msdr.Read() if (msdr.HasRows) Console.WriteLine(msdr.G

7、etString(0); msdr.Close(); MyConn.Close(); public void Connect_Net() string myConnectionString = Database=test;Data Source=localhost;User Id=root;Password=qing; MySqlConnection mycn = new MySqlConnection(myConnectionString); mycn.Open(); MySqlCommand mycm = new MySqlCommand(select * from hello,mycn)

8、; MySqlDataReader msdr = mycm.ExecuteReader(); while(msdr.Read() if (msdr.HasRows) Console.WriteLine(msdr.GetString(0); msdr.Close(); mycn.Close(); public static void Main() ConnectMySql ms = new ConnectMySql(); ms.Connect_CoreLab(); ms.Connect_Odbc(); Connect_Net(); 1、用MySQLDriverCS连接MySQL数据库先下载和安装

9、MySQLDriverCS，地址：在安装文件夹下面找到MySQLDriver.dll，然后将MySQLDriver.dll添加引用到项目中注：我下载的是版本是 MySQLDriverCS-n-EasyQueryTools-4.0.1-DotNet2.0.exeusing System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Data.Odbc;using System.Drawing;using System.Linq;using System.Tex

10、t;using System.Windows.Forms;using MySQLDriverCS; namespace mysql public partial class Form1 : Form public Form1() InitializeComponent(); private void Form1_Load(object sender, EventArgs e) MySQLConnection conn = null; conn = new MySQLConnection(new MySQLConnectionString(localhost, inv, root, 831025

11、).AsString); conn.Open(); MySQLCommand commn = new MySQLCommand(set names gb2312, conn); commn.ExecuteNonQuery(); string sql = select * from exchange ; MySQLDataAdapter mda = new MySQLDataAdapter(sql, conn); DataSet ds = new DataSet(); mda.Fill(ds, table1); this.dataGrid1.DataSource = ds.Tablestable

12、1; conn.Close(); 2、通过ODBC访问mysql数据库： 参考： 1. 安装Microsoft ODBC.net：我安装的是mysql-connector-odbc-3.51.22-win32.msi2. 安装MDAC 2.7或者更高版本：我安装的是mdac_typ.exe 2.7简体中文版3. 安装MySQL的ODBC驱动程序：我安装的是 odbc_net.msi4. 管理工具 - 数据源ODBC 配置DSN5. 解决方案管理中添加引用 Microsoft.Data.Odbc.dll(1.0.3300)6. 代码中增加引用 using Microsoft.Data.Odbc;

13、 using System;using System.Collections.Generic;using System.ComponentModel;using System.Drawing;using System.Linq; /vs2005好像没有这个命名空间，在c#2008下测试自动生成的using System.Text;using System.Windows.Forms;using Microsoft.Data.Odbc; namespace mysql public partial class Form1 : Form public Form1() InitializeCompo

14、nent(); private void Form1_Load(object sender, EventArgs e) string MyConString = DRIVER=MySQL ODBC 3.51 Driver; + SERVER=localhost; + DATABASE=inv; + UID=root; + PASSWORD=831025; + OPTION=3; OdbcConnection MyConnection = new OdbcConnection(MyConString); MyConnection.Open(); Console.WriteLine(n succe

15、ss, connected successfully !n); string query = insert into test values( hello, lucas, liu); OdbcCommand cmd = new OdbcCommand(query, MyConnection); /处理异常：插入重复记录有异常try cmd.ExecuteNonQuery();catch(Exception ex) Console.WriteLine(record duplicate.);finally cmd.Dispose(); /*用read方法读数据到textbox* string tm

16、p1 = null; string tmp2 = null; string tmp3 = null; query = select * from test ; OdbcCommand cmd2 = new OdbcCommand(query, MyConnection); OdbcDataReader reader = cmd2.ExecuteReader(); while (reader.Read() tmp1 = reader0.ToString(); tmp2 = reader1.ToString(); tmp3 = reader2.ToString(); this.textBox1.T

17、ext = tmp1 + + tmp2 + + tmp3; */ /*用datagridview控件显示数据表*string MyConString = DRIVER=MySQL ODBC 3.51 Driver; + SERVER=localhost; + DATABASE=inv; + UID=root; + PASSWORD=831025; + OPTION=3; OdbcConnection MyConnection = new OdbcConnection(MyConString);OdbcDataAdapter oda = new OdbcDataAdapter(select *

18、from customer , MyConnection);DataSet ds = new DataSet(); oda.Fill(ds, employee); this.dataGridView1.DataSource = ds.Tablesemployee;*/ MyConnection.Close(); 文章出处：1、用MySQLDriverCS连接MySQL数据库先下载和安装MySQLDriverCS，地址：在安装文件夹下面找到MySQLDriver.dll，然后将MySQLDriver.dll添加引用到项目中注：我下载的是版本是 MySQLDriverCS-n-EasyQueryT

19、ools-4.0.1-DotNet2.0.exe using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Data.Odbc;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using MySQLDriverCS; namespace mysql public partial class Form1 : Form publi

20、c Form1() InitializeComponent(); private void Form1_Load(object sender, EventArgs e) MySQLConnection conn = null; conn = new MySQLConnection(new MySQLConnectionString(localhost, inv, root, 831025).AsString); conn.Open(); MySQLCommand commn = new MySQLCommand(set names gb2312, conn); commn.ExecuteNon

21、Query(); string sql = select * from exchange ; MySQLDataAdapter mda = new MySQLDataAdapter(sql, conn); DataSet ds = new DataSet(); mda.Fill(ds, table1); this.dataGrid1.DataSource = ds.Tablestable1; conn.Close(); 2、通过ODBC访问mysql数据库： 参考： 1. 安装Microsoft ODBC.net：我安装的是mysql-connector-odbc-3.51.22-win32.

22、msi2. 安装MDAC 2.7或者更高版本：我安装的是mdac_typ.exe 2.7简体中文版3. 安装MySQL的ODBC驱动程序：我安装的是 odbc_net.msi4. 管理工具 - 数据源ODBC 配置DSN5. 解决方案管理中添加引用 Microsoft.Data.Odbc.dll(1.0.3300)6. 代码中增加引用 using Microsoft.Data.Odbc; using System;using System.Collections.Generic;using System.ComponentModel;using System.Drawing;using Sys

23、tem.Linq; /vs2005好像没有这个命名空间，在c#2008下测试自动生成的using System.Text;using System.Windows.Forms;using Microsoft.Data.Odbc; namespace mysql public partial class Form1 : Form public Form1() InitializeComponent(); private void Form1_Load(object sender, EventArgs e) string MyConString = DRIVER=MySQL ODBC 3.51 D

24、river; + SERVER=localhost; + DATABASE=inv; + UID=root; + PASSWORD=831025; + OPTION=3; OdbcConnection MyConnection = new OdbcConnection(MyConString); MyConnection.Open(); Console.WriteLine(n success, connected successfully !n); string query = insert into test values( hello, lucas, liu); OdbcCommand c

25、md = new OdbcCommand(query, MyConnection); /处理异常：插入重复记录有异常try cmd.ExecuteNonQuery();catch(Exception ex) Console.WriteLine(record duplicate.);finally cmd.Dispose(); /*用read方法读数据到textbox* string tmp1 = null; string tmp2 = null; string tmp3 = null; query = select * from test ; OdbcCommand cmd2 = new Od

26、bcCommand(query, MyConnection); OdbcDataReader reader = cmd2.ExecuteReader(); while (reader.Read() tmp1 = reader0.ToString(); tmp2 = reader1.ToString(); tmp3 = reader2.ToString(); this.textBox1.Text = tmp1 + + tmp2 + + tmp3; */ /*用datagridview控件显示数据表*string MyConString = DRIVER=MySQL ODBC 3.51 Drive

27、r; + SERVER=localhost; + DATABASE=inv; + UID=root; + PASSWORD=831025; + OPTION=3; OdbcConnection MyConnection = new OdbcConnection(MyConString);OdbcDataAdapter oda = new OdbcDataAdapter(select * from customer , MyConnection);DataSet ds = new DataSet(); oda.Fill(ds, employee); this.dataGridView1.Data

28、Source = ds.Tablesemployee;*/ MyConnection.Close(); 文章出处：C#连接mysql数据库 1.连接:1.安装Microsoft ODBC.net。2.安装MySQL的ODBC驱动程序。2.解决方案管理中添加引用Microsoft.Data.Odbc.dll(1.0.3300)3.代码中增加引用using Microsoft.Data.Odbc;4.编写代码string MyConString = DRIVER=MySQL ODBC 3.51 Driver; + SERVER=localhost; +DATABASE=samp_db; +UID=

29、root; +PASSWORD=; +OPTION=3;/Connect to MySQL using Connector/ODBCOdbcConnection MyConnection = new OdbcConnection(MyConString); MyConnection.Open();Console.WriteLine(n ! success, connected successfully !n); MyConnection.Close();2.全部例程:/* sample : mycon.cs* purpose : Demo sample for ODBC.NET using C

30、onnector/ODBC* author : Venu, venu* (C) Copyright MySQL AB, 1995-2003*/* build command* * csc /t:exe * /out:mycon.exe mycon.cs * /r:Microsoft.Data.Odbc.dll */ using Console = System.Console;using Microsoft.Data.Odbc;namespace myodbc3class myconstatic void Main(string args)try /Connection string for

31、Connector/ODBC 2.50/*string MyConString = DRIVER=MySQL; + SERVER=localhost; +DATABASE=test; +UID=venu; +PASSWORD=venu; +OPTION=3;*/Connection string for Connector/ODBC 3.51string MyConString = DRIVER=MySQL ODBC 3.51 Driver; + SERVER=localhost; +DATABASE=test; +UID=venu; +PASSWORD=venu; +OPTION=3;/Co

32、nnect to MySQL using Connector/ODBCOdbcConnection MyConnection = new OdbcConnection(MyConString); MyConnection.Open();Console.WriteLine(n ! success, connected successfully !n); /Display connection informationConsole.WriteLine(Connection Information:); Console.WriteLine(tConnection String: + MyConnec

33、tion.ConnectionString); Console.WriteLine(tConnection Timeout: + MyConnection.ConnectionTimeout); Console.WriteLine(tDatabase: + MyConnection.Database); Console.WriteLine(tDataSource: + MyConnection.DataSource);Console.WriteLine(tDriver: + MyConnection.Driver);Console.WriteLine(tServerVersion: + MyC

34、onnection.ServerVersion);/Create a sample tableOdbcCommand MyCommand = new OdbcCommand(DROP TABLE IF EXISTS my_odbc_net,MyConnection);MyCommand.ExecuteNonQuery();MyCommand.CommandText = CREATE TABLE my_odbc_net(id int, name varchar(20), idb bigint);MyCommand.ExecuteNonQuery();/InsertMyCommand.Comman

35、dText = INSERT INTO my_odbc_net VALUES(10,venu, 300); Console.WriteLine(INSERT, Total rows affected: + MyCommand.ExecuteNonQuery();/InsertMyCommand.CommandText = INSERT INTO my_odbc_net VALUES(20,mysql,400); Console.WriteLine(INSERT, Total rows affected: + MyCommand.ExecuteNonQuery();/InsertMyComman

36、d.CommandText = INSERT INTO my_odbc_net VALUES(20,mysql,500); Console.WriteLine(INSERT, Total rows affected: + MyCommand.ExecuteNonQuery();/UpdateMyCommand.CommandText = UPDATE my_odbc_net SET id=999 WHERE id=20; Console.WriteLine(Update, Total rows affected: + MyCommand.ExecuteNonQuery();/COUNT(*) MyCommand.Co