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.cs
using
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
c
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
MyC
string
MyC
+
"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
myC
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()
}
}
MySql安装
yum -y install libaio
wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz
cd /usr/local/soft/mysql/src
mkdir ../5.7.24_3306 &&tar -xzvf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz -C ../5.7.24_3306 --strip-components 1
mkdir -p /usr/local/soft/mysql/5.7.24_3306/{run,data,logs,bin_log,sock,cert}
groupadd mysql &&useradd -r -g mysql -s /bin/false mysql
cd /usr/local/soft/mysql/5.7.24_3306/bin &&./mysqld --initialize
--explicit_defaults_for_timestamp
--user=mysql
--basedir=/usr/local/soft/mysql/5.7.24_3306
--datadir=/usr/local/soft/mysql/5.7.24_3306/data
--lc_messages_dir=/usr/local/soft/mysql/5.7.24_3306/share
--lc_messages=en_US
2018-12-01T09:56:45.934627Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-12-01T09:56:46.056837Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-12-01T09:56:46.127141Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 69d028f9-f54f-11e8-9c4a-00163e08e793.
2018-12-01T09:56:46.130249Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2018-12-01T09:56:46.131377Z 1 [Note] A temporary password is generated for root@localhost: sDdPx3>.,oBi
cd /usr/local/soft/mysql/5.7.24_3306/bin &&./mysql_ssl_rsa_setup --datadir=/usr/local/soft/mysql/5.7.24_3306/cert
修改证书权限为644
cd /usr/local/soft/mysql/5.7.24_3306/bin &&./mysql -uroot -S /usr/local/soft/mysql/5.7.24_3306/sock/mysql.sock
use mysql
update user set host = '%', authentication_string = password('123456') where user = 'root'
select host,user,authentication_string from user
flush privileges
grant all privileges on . to 'root'@'%'
flush privileges
cat >/etc/systemd/system/3306.service <<EOF
[Unit]
Description=MySQL 3306
Documentation= http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target remote-fs.target nss-lookup.target
[Service]
Type=forking
PIDFile=/usr/local/soft/mysql/5.7.24_3306/run/mysql.pid
ExecStart=/usr/local/soft/mysql/5.7.24_3306/support-files/mysql.server start
ExecReload=/usr/local/soft/mysql/5.7.24_3306/support-files/mysql.server restart
ExecStop=/usr/local/soft/mysql/5.7.24_3306/support-files/mysql.server stop
PrivateTmp=true
[Install]
WantedBy=multi-user.target
EOF
systemctl enable 3306.service
1、
cd /usr/local/soft/mysql/5.7.24.3306/bin &&./mysqld_safe --skip-grant-tables &
cd /usr/local/soft/mysql/5.7.24.3306/bin &&./mysqld_safe --skip-grant-tables --skip-networking &
2、
./mysql -uroot -p -S /usr/local/soft/mysql/5.7.24.3306/sock/mysql.sock
3、
use mysql
update mysql.user set authentication_string=password('123456') where user='root'
flush privileges
mkdir -p /usr/local/soft/mysql/back/5.7.23_3306 &&cp -Rf /usr/local/soft/mysql/5.7.23_3306/* /usr/local/soft/mysql/back/5.7.23_3306
mkdir -p /usr/local/soft/mysql/back/5.7.24_3306 &&cp -Rf /usr/local/soft/mysql/5.7.24_3306/* /usr/local/soft/mysql/back/5.7.24_3306
CREATE USER 'sdyc'@'%' IDENTIFIED BY '123456'
GRANT SELECT, INSERT, UPDATE, DELETE, EXECUTE ON sd_data.* TO 'sdyc'@'%'
GRANT SELECT, INSERT, UPDATE, DELETE, EXECUTE ON card_data.* TO 'sdyc'@'%'
SHOW GRANTS FOR sdyc
CREATE USER 'back'@'localhost' IDENTIFIED BY '123456'
GRANT SELECT, RELOAD, PROCESS, SHOW DATABASES, SUPER, LOCK TABLES, REPLICATION CLIENT ON . TO 'back'@'localhost'
SHOW GRANTS FOR back
REVOKE SELECT, INSERT, UPDATE, DELETE, EXECUTE ON sd_data.* FROM 'sdyc'@'%'
方法/步骤MySQL安装文件分为两种,一种是msi格式的,一种是zip格式的。如果是msi格式的可以直接点击安装,按照它给出的安装提示进行安装(相信大家的英文可以看懂英文提示),一般MySQL将会安装在C:\Program Files\MySQL\MySQL Server 5.6 该目录中;zip格式是自己解压,解压缩之后其实MySQL就可以使用了,但是要进行配置。
解压之后可以将该文件夹改名,放到合适的位置,个人建议把文件夹改名为MySQL Server 5.6,放到C:\Program Files\MySQL路径中。当然你也可以放到自己想放的任意位置。
完成上述步骤之后,很多用户开始使用MySQL,但会出现图示的错误。这是因为没有配置环境变量所致。配置环境变量很简单:
我的电脑->属性->高级->环境变量
选择PATH,在其后面添加: 你的mysql bin文件夹的路径 (如:C:\Program Files\MySQL\MySQL Server 5.6\bin )
PATH=.......C:\Program Files\MySQL\MySQL Server 5.6\bin (注意是追加,不是覆盖)
配置完环境变量之后先别忙着启动mysql,我们还需要修改一下配置文件(如果没有配置,之后启动的时候就会出现图中的错误哦!:错误2 系统找不到文件),mysql-5.6.1X默认的配置文件是在C:\Program Files\MySQL\MySQL Server 5.6\my-default.ini,或者自己建立一个my.ini文件,
在其中修改或添加配置(如图):
[mysqld]
basedir=C:\Program Files\MySQL\MySQL Server 5.6(mysql所在目录)
datadir=C:\Program Files\MySQL\MySQL Server 5.6\data (mysql所在目录\data)
以管理员身份运行cmd(一定要用管理员身份运行,不然权限不够),
输入:cd C:\Program Files\MySQL\MySQL Server 5.6\bin 进入mysql的bin文件夹(不管有没有配置过环境变量,也要进入bin文件夹,否则之后启动服务仍然会报错误2)
输入mysqld -install(如果不用管理员身份运行,将会因为权限不够而出现错误:Install/Remove of the Service Denied!)
安装成功
安装成功后就要启动服务了,继续在cmd中输入:net start mysql(如图),服务启动成功!
此时很多人会出现错误,请看注意:
注意:这个时候经常会出现错误2和错误1067。
如果出现“错误2 系统找不到文件”,检查一下是否修改过配置文件或者是否进入在bin目录下 *** 作,如果配置文件修改正确并且进入了bin文件夹,需要先删除mysql(输入 mysqld -remove)再重新安装(输入 mysqld -install);
如果出现错误1067,那就是配置文件修改错误,确认一下配置文件是否正确。
服务启动成功之后,就可以登录了,如图,输入mysql -u root -p(第一次登录没有密码,直接按回车过),登录成功!
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