MySQLHelper 是一个用于操作 MySQL 数据库的 C# 库，它提供了一系列静态方法来执行常见的数据库操作，如创建、读取、更新和删除数据。要使用 MySQLHelper，首先需要安装它。你可以通过 NuGet 包管理器来安装：

打开 Visual Studio。右键点击项目，选择 “管理 NuGet 程序包”。在搜索框中输入 “MySqlHelper”，然后选择 “MySql.Data.MySqlClient”（这是 MySQLHelper 使用的数据库驱动程序）。点击 “安装”，等待安装完成。

安装完成后，你可以在项目中引入 MySql.Data.MySqlClient 命名空间并使用 MySQLHelper 类。以下是一些基本示例：

添加连接字符串：

在你的项目的 appsettings.json 文件中添加一个连接字符串，例如：

{"ConnectionStrings": {"MyConnectionString": "server=localhost;port=3306;database=mydb;uid=myuser;password=mypassword"}}

创建数据库连接：

using MySql.Data.MySqlClient;string connectionString = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;using (MySqlConnection connection = new MySqlConnection(connectionString)){connection.Open();// 在这里执行数据库操作}

执行查询：

using MySql.Data.MySqlClient;string connectionString = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;using (MySqlConnection connection = new MySqlConnection(connectionString)){connection.Open();string query = "SELECT * FROM mytable";using (MySqlCommand command = new MySqlCommand(query, connection))using (MySqlDataReader reader = command.ExecuteReader()){while (reader.Read()){Console.WriteLine($"ID: {reader["id"]}, Name: {reader["name"]}");}}}

插入数据：

using MySql.Data.MySqlClient;string connectionString = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;using (MySqlConnection connection = new MySqlConnection(connectionString)){connection.Open();string query = "INSERT INTO mytable (name) VALUES (@name)";using (MySqlCommand command = new MySqlCommand(query, connection)){command.Parameters.AddWithValue("@name", "John Doe");command.ExecuteNonQuery();}}

更新数据：

using MySql.Data.MySqlClient;string connectionString = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;using (MySqlConnection connection = new MySqlConnection(connectionString)){connection.Open();string query = "UPDATE mytable SET name = @name WHERE id = @id";using (MySqlCommand command = new MySqlCommand(query, connection)){command.Parameters.AddWithValue("@name", "Jane Doe");command.Parameters.AddWithValue("@id", 1);command.ExecuteNonQuery();}}

删除数据：

using MySql.Data.MySqlClient;string connectionString = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;using (MySqlConnection connection = new MySqlConnection(connectionString)){connection.Open();string query = "DELETE FROM mytable WHERE id = @id";using (MySqlCommand command = new MySqlCommand(query, connection)){command.Parameters.AddWithValue("@id", 1);command.ExecuteNonQuery();}}

这些示例展示了如何使用 MySQLHelper 类执行基本的数据库操作。你可以根据自己的需求调整查询和参数。