两种方法连接MySql数据库

、用MySQLDriverCS连接MySQL数据库

先下载和安装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。

    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", "").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();  

            }  

        }
    }
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、通过ODBC访问mysql数据库：

.安装Microsoft ODBC.net：我安装的是mysql-connector-odbc-3.51.-win32.msi

.安装MDAC .7或者更高版本：我安装的是mdac_typ.exe .7简体中文版

.安装MySQL的ODBC驱动程序：我安装的是 odbc_net.msi

.管理工具 -> 数据源ODBC –>配置DSN…

.解决方案管理中添加引用 Microsoft.Data.Odbc.dll(1.0.)

.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[].ToString();
                    tmp2 = reader[].ToString();
                    tmp3 = reader[].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();
            }
        }
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