连接MYSQL数据库的方法及示例

连接mysql数据库的方法及示例
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.csusing 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();
}
}