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C#连接mariadb(MYSQL分支)代码示例分享

 更新时间：2020年6月25日 11:39  点击：2215

首先配置好你的MariaDb,创建test数据库，在test里创建MyTable表，脚本如下（通过HeidiSQL导出的脚本）：

复制代码 代码如下:

-- --------------------------------------------------------
-- 主机:                           172.16.40.153
-- 服务器版本:                        5.5.5-10.0.4-MariaDB-1~wheezy-log - mariadb.org binary distribution
-- 服务器操作系统:                      debian-linux-gnu
-- HeidiSQL 版本:                  8.1.0.4545
-- --------------------------------------------------------

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET NAMES utf8 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;

-- 导出 test 的数据库结构
DROP DATABASE IF EXISTS `test`;
CREATE DATABASE IF NOT EXISTS `test` /*!40100 DEFAULT CHARACTER SET latin1 */;
USE `test`;

 
-- 导出  表 test.MyTable 结构
DROP TABLE IF EXISTS `MyTable`;
CREATE TABLE IF NOT EXISTS `MyTable` (
  `id` int(11) NOT NULL,
  `username` varchar(32) DEFAULT NULL,
  `password` varchar(32) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

-- 正在导出表  test.MyTable 的数据：~0 rows (大约)
DELETE FROM `MyTable`;
/*!40000 ALTER TABLE `MyTable` DISABLE KEYS */;
INSERT INTO `MyTable` (`id`, `username`, `password`) VALUES
    (1, '2013/10/13', '1f11082e-7c23-4ffd-bfd2-67b0a58d'),
    (25, '2013/10/13', 'fc52bd01-474b-4fa4-86f1-18d3a3c7'),
    (32, '2013/10/13', '1078f559-3e39-4b7d-bcab-0286c7f4'),
    (58, '2013/10/13', '95ee6ce5-fcef-4785-bd0d-3482e6de');
/*!40000 ALTER TABLE `MyTable` ENABLE KEYS */;
/*!40101 SET SQL_MODE=IFNULL(@OLD_SQL_MODE, '') */;
/*!40014 SET FOREIGN_KEY_CHECKS=IF(@OLD_FOREIGN_KEY_CHECKS IS NULL, 1, @OLD_FOREIGN_KEY_CHECKS) */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;

C#代码如下：包含了简单的新增删除查询，工具是vs2012版本，一定要下载mysql-connector-net，我选择的是最新的版本

别忘了添加引用

复制代码 代码如下:

using MySql.Data.MySqlClient;

复制代码 代码如下:

MySqlConnection connection_;
        private void buttonOpenConnect_Click(object sender, EventArgs e)
        {
            //string connectionStr = "server=127.0.0.1;user id=root;password=;database=test";
            string connectionStr = "server=172.16.40.153;user id=root;password=123456;database=test";
            connection_ = new MySqlConnection(connectionStr);
            connection_.Open();
            MessageBox.Show("Connect OK!");
        }

        private void buttonSelect_Click(object sender, EventArgs e)
        {
            if (connection_ == null)
            {
                MessageBox.Show("Please open connect!");
                return;
            }
            string sql = "SELECT * FROM MyTable";
            MySqlDataAdapter adapter = new MySqlDataAdapter(sql, connection_);
            DataTable dataTable = new DataTable();
            adapter.Fill(dataTable);
            dataGridViewMariaDB.DataSource = dataTable;
        }

        private void buttonCloseConnect_Click(object sender, EventArgs e)
        {
            if (connection_ != null)
            {
                connection_.Close();
                MessageBox.Show("Connect Close!");
            }
        }

        private void buttonInsert_Click(object sender, EventArgs e)
        {
            if (connection_ == null)
            {
                MessageBox.Show("Please open connect!");
                return;
            }
            int id = DateTime.Now.Second;
            string username = DateTime.Now.ToShortDateString();
            string password = Guid.NewGuid().ToString();
            string sql = string.Format("INSERT INTO MyTable (`id`,`username`,`password`) VALUES({0},'{1}','{2}');", id, username, password);
            MySqlCommand command = new MySqlCommand(sql, connection_);
            int affectLines = command.ExecuteNonQuery();

            MessageBox.Show("Affect " + affectLines.ToString() + " line");

        }

        private void buttonDelete_Click(object sender, EventArgs e)
        {
            if (connection_ == null)
            {
                MessageBox.Show("Please open connect!");
                return;
            }
            int no = Convert.ToInt32(textBoxNO.Text);
            string sql = string.Format("DELETE FROM MyTable WHERE id={0}", no);
            MySqlCommand command = new MySqlCommand(sql, connection_);
            int affectLines = command.ExecuteNonQuery();

            MessageBox.Show("Affect " + affectLines.ToString() + " line");

        }

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