我如何从数据库中读取值并在消息框中返回它

Question

我是C＃编码的新手，我试图在数据库中返回app_text的idoptions 1，但是当我单击按钮时，什么都没有发生。

我已尝试解决此问题，但我不能

private void conexion()
        {



            connectionString = String.Format("server=a;port=a;user id=a; password=a; database=aa; SslMode=none", server, port, user, password, database, sslM);
            mysqlConnection connection = new MySqlConnection(connectionString);


            try
            {
                MySqlCommand command = new MySqlCommand("SELECT app_text FROM options WHERE idoptions=1", connection);
                MySqlDataReader reader;


                connection.Open();
                reader = command.ExecuteReader();



                while (reader.Read())
                {
                   MessageBox.Show(reader["app_text"].ToString());
                }

                connection.Close();
            }

            catch (MySqlException ex)
            {
                MessageBox.Show(ex.ToString());
            }






        }