How to send Slider Information over websocket?

Question

Hello I am using the wesocketsharp from here

I have sliders in my environment. I want to send out the slider position information through the WebSocket to my receiver (another socket). How can I do this?

Ok as suggested, here are my game object or the sliders I have.

  public void initializeSliders(Slider[] sliderList_)
     {
         var CanvasChildren = CanvasObj.GetComponentsInChildren<Slider>();
 
         for (int i = 0; i < CanvasChildren.Length; i++)
         {
             if (CanvasChildren[i].name == "Slider0")
             {
                 sliderList_[0] = CanvasChildren[i];
 
                 sliderList_[0].minValue = lowerLimit[0];
                 sliderList_[0].maxValue = upperLimit[0];
                 sliderList_[0].value = 0;
             }
             else if (CanvasChildren[i].name == "Slider1")
             {
                 sliderList_[1] = CanvasChildren[i];
 
                 sliderList_[1].minValue = lowerLimit[1];
                 sliderList_[1].maxValue = upperLimit[1];
                 sliderList_[1].value = 0;
             }
             else if (CanvasChildren[i].name == "Slider2")
             {
                 sliderList_[2] = CanvasChildren[i];
 
                 sliderList_[2].minValue = lowerLimit[2];
                 sliderList_[2].maxValue = upperLimit[2];
                 sliderList_[2].value = 0;
             }
          }
     }

I would like to get the value of the sliders when the user manipulates them in the hololens and send it over the WebSocket. ( I am new to Unity and C#)

I am trying to follow the example documentation here in github and this issue. However, any pointers would be appreciated.

Answer 1

So this is what I did: I create a connect function as you see below.

  public void Connect()
     {
         //Async connection.
 #if UNITY_EDITOR
         Thread = new Thread(Run);
         Thread.Start();
 #endif
 
 #if !UNITY_EDITOR
         
         messageWebSocket = new MessageWebSocket();
 
         server = new Uri("ws://" + host + ":" + port.ToString());
 
         IAsyncAction outstandingAction = messageWebSocket.ConnectAsync(server);
         AsyncActionCompletedHandler aach = new AsyncActionCompletedHandler(NetworkConnectedHandler);
         outstandingAction.Completed = aach;
 #endif
     }
 #if !UNITY_EDITOR
     public void NetworkConnectedHandler(IAsyncAction asyncInfo, AsyncStatus status)
     {
         // Status completed is successful.
         if (status == AsyncStatus.Completed)
         {
             //Guarenteed connection
             con = true;
             
             //Creating the writer that will be repsonsible to send a message
             dataWriter = new DataWriter(messageWebSocket.OutputStream);
         }
         else
         {
             con = false;
         }
     }
 #endif

and a sendservice method:

   public void SendService(string service, string args)
     {
 #if UNITY_EDITOR
         if (Socket != null)
         {
             string s = CallService(service, args);
             Socket.Send(s);
         }
 #endif
 
 #if !UNITY_EDITOR
         if (messageWebSocket != null)
         {
             string s = CallService(service, args);
             dataWriter.WriteString(s);
             dataWriter.StoreAsync();
         }
 #endif
     }

I have button called "Connect" which i want to use for connecting to the host ip +port , which has a method as : (I got this changestate button thingy from online source)

  public void ChangeButtonState(State newState)
     {
         State oldState = currentState;
         currentState = newState;
 
         if (newState > oldState)
         {
             for (int j = (int)newState; j > (int)oldState; j--)
             {
                 buttonRenderer.material.SetFloat("_BlendTex0" + j, 1.0f);
             }
         }
         else
         {
             for (int j = (int)oldState; j > (int)newState; j--)
             {
                 buttonRenderer.material.SetFloat("_BlendTex0" + j, 0.0f);
             }
         }
     }

So in my Update method: I sent over my message by packing it in a string:

 public void Update(){
 #if UNITY_EDITOR
         //
 #endif
         if (con)
         {
             communicator.ChangeButtonState(ButtonFunction.State.Selected);
         }
     
           slider_info = System.String.Format(",",sliderList[0].value.ToString(), sliderList[1].value.ToString(), sliderList[2].value.ToString(),
                     sliderList[3].value.ToString(),
                     sliderList[4].value.ToString(),
                     sliderList[5].value.ToString());
                     SendService("/holo/slider_value", slider_info); 
     
     }

con is a bool variable set to false.

I am sure I am missing out something.

I certainly cant establish any connection and see slider messages on the other end of the socket that is running.
I am receiving an error message when I play my unity editor, which I have not googled yet (new to C#).

Error Message:

  NullReferenceException: Object reference not set to an instance of an object  Source.Update () (at Assets/Scripts/Source.cs:54)

Kindly help.

How to send Slider Information over websocket?

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