MySQL:无法建立连接，因为目标计算机主动拒绝它C#

sudo systemctl status mysql

sudo systemctl start mysql

sudo netstat -tuln | grep 3306

sudo ufw allow 3306

bind-address = 0.0.0.0

sudo systemctl restart mysql

string connectionString = "Server=your_server_address;Port=3306;Database=your_database;Uid=your_username;Pwd=your_password;";

GRANT ALL PRIVILEGES ON your_database.* TO 'your_username'@'%' IDENTIFIED BY 'your_password';
FLUSH PRIVILEGES;

using System;
using MySql.Data.MySqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "Server=your_server_address;Port=3306;Database=your_database;Uid=your_username;Pwd=your_password;";
        
        try
        {
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();
                Console.WriteLine("成功连接到MySQL数据库!");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("连接失败: " + ex.Message);
        }
    }
}