c#连接MySql数据库的方法

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原地址

http://www.cnblogs.com/genli/articles/1956537.html

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.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using MySQLDriverCS;namespace jxkh{    public partial class frmLogin : Form    {        public frmLogin()        {            InitializeComponent();        }        private void btnLogin_Click(object sender, EventArgs e)        {                      MySQLConnectionString tConnStr = new MySQLConnectionString("10.14.55.46", "performance", "administrator", "1234567@byd", 3306);            MySQLConnection tConn = new MySQLConnection(tConnStr.AsString);            try            {                tConn.Open();  //打开连接                MySQLCommand cmd4 = new MySQLCommand("set names gb2312", tConn);                cmd4.ExecuteNonQuery();                string tCmd = "select ID,Name,PassWord from managers";  //命令语句                MySQLCommand cmd = new MySQLCommand(tCmd,tConn);  //在定义的tConn对象上执行查询命令                MySQLDataReader tReader = cmd.ExecuteReaderEx();                if(tReader.Read())   // 一次读一条记录                {                    if(tReader["Name"].ToString()==textBox1.Text&&tReader["PassWord"].ToString()==textBox2.Text)                    {                        frmJxkh myJxkh = new frmJxkh();                        myJxkh.Show();                    }                }                tConn.Close();//重要！要及时关闭                tReader.Close();                           }            catch            {                tConn.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();        }    }}

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