MySql.Data.MySqlClient.MySqlDataAdapter da = new MySql.Data.MySqlClient.MySqlDataAdapter();
                DataTable tabella = new DataTable();
                da.SelectCommand = new MySql.Data.MySqlClient.MySqlCommand();
                da.SelectCommand.Connection = new MySqlConnection(global::drill_manager.Properties.Settings.Default.gestione_impiantoConnectionString);
                da.SelectCommand.CommandType = CommandType.Text;
                da.SelectCommand.CommandText = "SELECT inizio FROM prenotazione WHERE inizio= ?inizio";"
                da.SelectCommand.Parameters.Add("?inizio", MySql.Data.MySqlClient.MySqlDbType.DateTime).Value = dataCorrente;
             
                if (da.SelectCommand.Connection.State == ConnectionState.Closed)
                {
                    da.SelectCommand.Connection.Open();
                }
                da.Fill(tabella);
                
                    MessageBox.Show(tabella.Rows[0]["inizio"].ToString());