c#连接mysql中文乱码解决方案（MySql.Data.dll）

今天用C#类连接mysql数据库出现中文乱码具体解决方案如下：

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用到的mysql表结构：

CREATE TABLE IF NOT EXISTS `tet` (
? `id` int(11) NOT NULL,
? `name` varchar(255) NOT NULL,
? `url` varchar(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

用到的mysql表数据：

INSERT INTO `tet` (`id`, `name`, `url`) VALUES
(1, '百度 ', 'http://www.baidu.com '),
(0, 'google ', 'http://www.google.com.hk '),
(3, '400电话 ', 'http://www.my400800.cn ');

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一、查询结果没有问题，在查询条件中如果输入中文查询不到内容，用insert测试为，插入的内容是乱码

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????? 首先在MySQL Command Line Client里面输入“SHOW VARIABLES LIKE 'character_set_%';”，可看到如下字符：

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Variable_name Value

character_set_client	utf8
character_set_connection	utf8
character_set_database	utf8
character_set_filesystem	binary
character_set_results	utf8
character_set_server	latin1
character_set_system	utf8
character_sets_dir	C:\Program Files\VertrigoServ\Mysql\share\charsets\

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可以用如下连接字符串解决中文乱码问题

User Id=test;Host=localhost;Database=eczhou;password=test;charset='gb2312'

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二、检索结果和插入内容都是乱码

用MySQL Command Line Client里面输入“SHOW VARIABLES LIKE 'character_set_%';”，可看到如下字符：

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Variable_name Value

character_set_client	utf8
character_set_connection	utf8
character_set_database	utf8
character_set_filesystem	binary
character_set_results	utf8
character_set_server	utf8
character_set_system	utf8
character_sets_dir	/usr/share/mysql/charsets/

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即便是连接字符串改成

User Id=test;Host=localhost;Database=eczhou;password=test;charset=utf8 检索的结果还是乱码

郁闷中。。。。。。。

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然后用? show variables like 'collation%';显示结果是：

+----------------------+-----------------+
| Variable_name??????? | Value?????????? |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database?? | utf8_general_ci |
| collation_server???? | utf8_general_ci |
+----------------------+-----------------+

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show variables like 'character%';

+--------------------------+----------------------------+
| Variable_name??????????? | Value????????????????????? |
+--------------------------+----------------------------+
| character_set_client???? | latin1???????????????????? |
| character_set_connection | latin1???????????????????? |
| character_set_database?? | utf8?????????????????????? |
| character_set_filesystem | binary???????????????????? |
| character_set_results??? | latin1???????????????????? |
| character_set_server???? | utf8?????????????????????? |
| character_set_system???? | utf8?????????????????????? |
| character_sets_dir?????? | /usr/share/mysql/charsets/ |