GameObject.Find is not working

Hello.

Im tryiing to create a multiplayer chat consisting of a server and a client. Im still kind of new to programming so this is the video im following:

at 3:29 he uses the function GameObject.Find to find a textbox game object and write inside of it.
It works for him perfectly, but apparently not for me.
I have attached a picture of my code.
is there a similar way to do this? I hope someone is able to help and maybe provide an example.

Thank you very much for helping!

 

Is that GameObject named "HostInput"?
I need to see your GameObject hierarchy on Unity.

A similar way to do this is to create a public field on your class and associate it to your GameObject from Inspector on Unity Editor.

Code (CSharp):

1. public class MyClass : MonoBehaviour {
2.     public GameObject hostInput;
3.  
4.     ...
5. }

Here you can associate your GameObject to this field on your script:

 

My unity does not recognize public GameObject either.. it just stays grey and is not recognized. Thank you for answering

 

Make sure you call GameObject.Find from a function in your script, most likely the Start() or Awake() function since GameObject.Find is quite performance heavy (https://docs.unity3d.com/ScriptReference/GameObject.Find.html). Also make sure the GameObjects "HostInput" and "PortInput" are present in your scene hierarchy and have a InputField attached. See the example below how to use GameObject.Find() from the Start() function.

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3.  
4. public class FindDemo : MonoBehaviour {  
5.     string host, h;
6.     int port, p;
7.  
8.     // Use this for initialization
9.     void Start () {
10.         h = GameObject.Find("HostInput").GetComponent<InputField>().text;
11.  
12.         if (h != "")
13.         {
14.             host = h;  
15.         }
16.         int.TryParse(GameObject.Find("PortInput").GetComponent<InputField>().text, out p);
17.         if (p != 0)
18.         {
19.             port = p;
20.         }
21.     }
22. }

 

Thank you for your answer Kaart.
HostInput and PortInput are in my scene hierarchy and they do have input fields. I tried moving the lines of code to publiv void start() and this does not work either. Its completely greyed our and for some reason it just wont be recognized.

 

Did you include UnityEngine?

Code (CSharp):

1. using UnityEngine;

 

Yes

 

Ït's active

 

Heres my code for the client:

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5. using UnityEngine.UI;
6. using System.Net.Sockets;
7. using System.IO;
8. using System;
9. using System.Net;
10.  
11.  
12. public class Client : MonoBehaviour
13. {
14.  
15.     private bool socketReady;
16.     private TcpClient socket;
17.     private NetworkStream stream;
18.     private StreamWriter writer;
19.     private StreamReader reader;
20.    
21.  
22.    
23.        public void ConnectToServer()
24.     {
25.         //if already connected, ignore this function
26.         if (socketReady)
27.         {
28.             return;
29.         }
30.  
31.         //Deafult host / port values
32.         string host = "127.0.0.1";
33.         int port = 6321;
34.                 //Overwrite default host / port values, if theres is anything in the text boxes
35.        string h;
36.         int p;
37.  
38.  
39.         h = GameObject.Find("HostInput").GetComponent<InputField>().text;
40.         if (h != "")
41.             host = h;
42.         int.TryParse(GameObject.Find("PortInput").GetComponent<InputField>().text, out p);
43.         if (p != 0)
44.             port = p;
45.  
46.         //Create the socket
47.         try
48.         {
49.             socket = new TcpClient(host, port);
50.             stream = socket.GetStream();
51.             writer = new StreamWriter(stream);
52.             reader = new StreamReader(stream);
53.             socketReady = true;
54.  
55.  
56.         }
57.         catch(Exception e)
58.         {
59.             Debug.Log("Socket error " + e.Message);
60.  
61.         }
62.  
63.     }
64.  
65.     private void Update()
66.     {
67.         if (socketReady)
68.         {
69.             if (stream.DataAvailable)
70.             {
71.                 string data = reader.ReadLine();
72.                 if (data != null)
73.                     OnIncomingData(data);
74.             }
75.         }
76.  
77.     }
78.     private void OnIncomingData(string data)
79.     {
80.         Debug.Log("Server: " + data);
81.     }
82. }
83.  

Heres's my code for the Server:

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5. using System.Net.Sockets;
6. using System;
7. using System.Net;
8. using System.IO;
9.  
10. public class Server : MonoBehaviour
11. {
12.     private List<ServerClient> clients;
13.     private List<ServerClient> disconnectList;
14.  
15.     public int port = 6231;
16.     private TcpListener server;
17.     private bool serverStarted;
18.  
19.     private void Start()
20.     {
21.         clients = new List<ServerClient>();
22.         disconnectList = new List<ServerClient>();
23.  
24.         try
25.         {
26.             server = new TcpListener(IPAddress.Any, port);
27.             server.Start();
28.  
29.             StartListenning();
30.             serverStarted = true;
31.             Debug.Log("Server has been started on port " + port.ToString());
32.         }
33.         catch (Exception e)
34.         {
35.             Debug.Log("Socket error:" + e.Message);
36.         }
37.  
38.     }
39.  
40.     private void Update()
41.     {
42.         if (!serverStarted)
43.             return;
44.  
45.         foreach (ServerClient c in clients)
46.         {
47.             //is the client still connected?
48.             if (!IsConnected(c.tcp))
49.             {
50.                 c.tcp.Close();
51.                 disconnectList.Add(c);
52.                 continue;
53.             }
54.  
55.             //Check for message from the client
56.             else
57.             {
58.                 NetworkStream s = c.tcp.GetStream();
59.                 if (s.DataAvailable)
60.                 {
61.                     StreamReader reader = new StreamReader(s, true);
62.                     string data = reader.ReadLine();
63.  
64.                     if (data != null)
65.                         OnIncomingData(c, data);
66.                 }
67.             }
68.         }
69.     }
70.  
71.     private void StartListenning()
72.     {
73.         server.BeginAcceptTcpClient(AcceptTcpClient, server);
74.     }
75.  
76.     private bool IsConnected(TcpClient c)
77.     {
78.         try
79.         {
80.             if (c != null && c.Client != null && c.Client.Connected)
81.             {
82.                 if (c.Client.Poll(0, SelectMode.SelectRead))
83.                 {
84.                     return !(c.Client.Receive(new byte[1], SocketFlags.Peek) == 0);
85.                 }
86.                 return true;
87.             }
88.             else return false;
89.         }
90.         catch
91.         {
92.             return false;
93.         }
94.     }
95.  
96.     private void AcceptTcpClient(IAsyncResult ar)
97.     {
98.         TcpListener listener = (TcpListener)ar.AsyncState;
99.  
100.         clients.Add(new ServerClient(listener.EndAcceptTcpClient(ar)));
101.         StartListenning();
102.  
103.         // Send a message to everyone, say someone has connected
104.         Broadcast(clients[clients.Count - 1].ClientName + "has connected", clients);
105.     }
106.  
107.     private void OnIncomingData(ServerClient c, string data)
108.     {
109.  
110.         Debug.Log(c.ClientName + "has sent the following message: " + data);
111.     }
112.     private void Broadcast(string data, List<ServerClient> cl)
113.     {
114.         foreach (ServerClient c in cl)
115.         {
116.             try
117.             {
118.                 StreamWriter writer = new StreamWriter(c.tcp.GetStream());
119.                 writer.WriteLine(data);
120.                 writer.Flush();
121.                                 }
122.             catch(Exception e)
123.             {
124.                 Debug.Log("Write error : " + e.Message + " to client" + c.ClientName);
125.             }
126.         }
127.     }
128.  
129. }
130.  
131. public class ServerClient
132. {
133.     public TcpClient tcp;
134.     public string ClientName;
135.  
136.     public ServerClient(TcpClient clientSocket)
137.     {
138.         ClientName = "Guest";
139.         tcp = clientSocket;
140.     }
141.  
142. }

My GameObjects are all active etc. So i have no idea why this is not working. I've been following a tutorial where it worked perfectly for the guy who made it.
This is the error i get when i run it:
Socket error: was not able to connect since the destination computer actively denied this.

(the error is translated from danish, so it might not be 100% correct)

 

Do you have any suggestions on where in my code this error happens?
Thank you