c#连接MySql数据库的两种方法

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测试环境：Windows XP + MySql 5.0.24 + Visual C# 2008 Exdivss Edition
By lucas 2008.12.29
1、用MySQLDriverCS连接MySQL数据库
先下载和安装MySQLDriverCS，地址：
http://sourceforge.net/projects/mysqldrivercs/
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.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
    {
        public 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.ExecuteNonQuery();
            string sql = "select * from exchange ";
            MySQLDataAdapter mda = new MySQLDataAdapter(sql, conn);
            DataSet ds = new DataSet();
            mda.Fill(ds, "table1");
            this.dataGrid1.DataSource = ds.Tables["table1"];
            conn.Close();
        }
    }
}

2、通过ODBC访问mysql数据库：
参考：http://www.microsoft.com/china/community/Column/63.mspx
1.      安装Microsoft ODBC.net：我安装的是mysql-connector-odbc-3.51.22-win32.msi
2.      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.msi
4.      管理工具 - 数据源ODBC –配置DSN
5.      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 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()
        {
            InitializeComponent();
        }
        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 success, 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 tmp1 = 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 = reader[0].ToString();
                tmp2 = reader[1].ToString();
                tmp3 = reader[2].ToString();
            }
            this.textBox1.Text = 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 * from customer ", MyConnection);
DataSet ds = new DataSet();
          oda.Fill(ds, "employee");
          this.dataGridView1.DataSource = ds.Tables["employee"];
*/
           MyConnection.Close();
        }
    }
}