DotNET使用CoreLab推出的MYSQL访问组件示例(学习)
DotNET连接MYSQL数据库有三种方法:
方法一:
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:odbc.net和MYSQL的ODBC驱动(MySQL Connector/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.MySql;
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",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;" +
"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.GetString(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);
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();
}
}
using System.Net;
using System.Text;
using CoreLab.MySql;
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",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;" +
"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.GetString(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);
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();
}
}
附:使用corelab的 oradirect.net data provider 也能连接并访问oracle数据库。不过,corelab的oradirect.net data provider 连接组件不是免费的,下载的demo版只能读取前8列。
来源:http://school.ogdev.net/ArticleShow.asp?id=3550&categoryid=19
作者: XuGang 网名:钢钢 |
出处: http://xugang.cnblogs.com |
声明: 本文版权归作者和博客园共有。转载时必须保留此段声明,且在文章页面明显位置给出原文连接地址! |