在C#中使用MySQLHelper来操作数据库，通常需要安装MySQL.Data包，然后创建一个MySQLHelper类来封装常用的数据库操作方法，包括连接数据库、执行查询、执行非查询操作等。

以下是一个示例代码，展示了如何使用MySQLHelper类来连接MySQL数据库并执行查询操作：

using MySql.Data.MySqlClient;using System;using System.Data;public class MySQLHelper{private string connectionString;public MySQLHelper(string connectionString){this.connectionString = connectionString;}public DataTable ExecuteQuery(string query){DataTable dataTable = new DataTable();using (MySqlConnection connection = new MySqlConnection(connectionString)){connection.Open();using (MySqlCommand command = new MySqlCommand(query, connection)){using (MySqlDataAdapter adapter = new MySqlDataAdapter(command)){adapter.Fill(dataTable);}}}return dataTable;}public int ExecuteNonQuery(string query){int rowsAffected = 0;using (MySqlConnection connection = new MySqlConnection(connectionString)){connection.Open();using (MySqlCommand command = new MySqlCommand(query, connection)){rowsAffected = command.ExecuteNonQuery();}}return rowsAffected;}}// 使用MySQLHelper类string connectionString = "Server=localhost;Database=mydatabase;Uid=username;Pwd=password;";MySQLHelper mySQLHelper = new MySQLHelper(connectionString);// 执行查询操作string query = "SELECT * FROM mytable";DataTable dataTable = mySQLHelper.ExecuteQuery(query);foreach (DataRow row in dataTable.Rows){Console.WriteLine(row["column1"].ToString());}// 执行非查询操作string insertQuery = "INSERT INTO mytable (column1, column2) VALUES ('value1', 'value2')";int rowsAffected = mySQLHelper.ExecuteNonQuery(insertQuery);Console.WriteLine("Rows affected: " + rowsAffected);

通过这样封装的MySQLHelper类，可以方便地在C#中连接MySQL数据库并执行各种数据库操作。在实际应用中，还可以根据需求进一步扩展MySQLHelper类，添加更多的数据库操作方法。