如何更新操縱桿狀態

Question

我想每次按下按鈕或移動操縱桿的軸時更新操縱桿狀態。我已經有這個代碼：

Imports Microsoft.DirectX 
Imports Microsoft.DirectX.DirectInput 

Dim js As Device = Nothing 

For Each DI As DeviceInstance In Manager.GetDevices(DeviceClass.GameControl, _ 
    EnumDevicesFlags.AttachedOnly) 

    js = New Device(DI.InstanceGuid) 
    Exit For 
Next 

If js Is Nothing Then 
    Throw New Exception("No joystick found") 
End If 

Dim wih As New System.Windows.Interop.WindowInteropHelper(Me) 
js.SetCooperativeLevel(wih.Handle, CooperativeLevelFlags.NonExclusive Or _ 
    CooperativeLevelFlags.Background) 
js.Acquire() 

Dim state As JoystickState = js.CurrentJoystickState 

最後一行獲取操縱桿的狀態。我已經看到，使用了一個計時器，每次滴答狀態刷新，但它似乎效率不高，因爲如果我不按任何按鈕狀態刷新無論如何。那麼如何才能在需要時刷新狀態？

Answer 1

我發現了一些關於如何只在操縱桿狀態發生變化時更新操縱桿狀態的C＃代碼。我看你已經有了：

Dim state As JoystickState = js.CurrentJoystickState 

也許嘗試只是類似於下面的例子中補充說：「這是C＃」

  //Capture Position. 
      info += "X:" + state.X + " "; 
      info += "Y:" + state.Y + " "; 
      info += "Z:" + state.Z + " "; 

      //Capture Buttons. 
      byte[] buttons = state.GetButtons(); 
      for(int i = 0; i < buttons.Length; i++) 
      { 
       if(buttons[i] != 0) 
       { 
        info += "Button:" + i + " "; 
       } 
      } 

這裏是全段我發現這裏位於：https://msdn.microsoft.com/en-us/library/windows/desktop/bb153252%28v=vs.85%29.aspx#dx_DirectInput_capturing_device_objects

private void UpdateJoystick() 
    { 
     string info = "Joystick: "; 

     //Get Mouse State. 
     JoystickState state = joystick.CurrentJoystickState; 

     //Capture Position. 
     info += "X:" + state.X + " "; 
     info += "Y:" + state.Y + " "; 
     info += "Z:" + state.Z + " "; 

     //Capture Buttons. 
     byte[] buttons = state.GetButtons(); 
     for(int i = 0; i < buttons.Length; i++) 
     { 
      if(buttons[i] != 0) 
      { 
       info += "Button:" + i + " "; 
      } 
     } 

     lbJoystick.Text = info; 
    }