c#连接MySql数据库的两种方法

一、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();
            }
        }
    }

二、通过ODBC访问mysql数据库：

    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("  success, connected successfully ! ");
                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();
            }
        }
    }