C# (CSharp) 命令模式Two CeilingFan.off примеры использования

Пример #1

 public void Undo()
 {
     if (prevSpeed == CeilingFan.High)
     {
         ceilingFan.high();
     }
     if (prevSpeed == CeilingFan.Medium)
     {
         ceilingFan.medium();
     }
     if (prevSpeed == CeilingFan.Low)
     {
         ceilingFan.low();
     }
     if (prevSpeed == CeilingFan.Off)
     {
         ceilingFan.off();
     }
 }

Пример #2

 public void Execute()
 {
     //执行前先记录速度，方便撤销
     prevSpeed = ceilingFan.GetSpeed();
     ceilingFan.off();
 }