totally changed communication between client and doctor. Needs to be tested. Also protocol needs to be changed to fix missing features.

ErgometerServer/ClientThread.cs

@@ -16,7 +16,7 @@ namespace ErgometerServer
         Server server;
 
         string name;
-        int session;
+        public int session { get; }
 
         bool running;
         bool loggedin;
@@ -36,14 +36,14 @@ namespace ErgometerServer
 
             metingen = new List<Meting>();
             chat = new List<ChatMessage>();
+            session = FileHandler.GenerateSession();
+            Console.WriteLine("Generated new session: " + session);
         }
 
         public void run()
         {
             running = true;
 
-            session = FileHandler.GenerateSession();
-            Console.WriteLine("Generated new session: " + session);
             NetHelper.SendNetCommand(client, new NetCommand(session));
 
             while (running)
@@ -72,10 +72,12 @@ namespace ErgometerServer
                         break;
                     case NetCommand.CommandType.DATA:
                         metingen.Add(input.Meting);
+                        server.sendToDoctor(input);
                         FileHandler.WriteMetingen(session, metingen);
                         break;
                     case NetCommand.CommandType.CHAT:
                         chat.Add(new ChatMessage(name, input.ChatMessage));
+                        server.sendToDoctor(input);
                         Console.WriteLine(name + ": " + input.ChatMessage);
                         break;
                     case NetCommand.CommandType.LOGOUT:
@@ -92,5 +94,13 @@ namespace ErgometerServer
             }
         }
 
+        public void writeToClient(NetCommand command)
+        {
+            NetHelper.SendNetCommand(client, command);
+            if (command.Type == NetCommand.CommandType.CHAT)
+            {
+                chat.Add(new ChatMessage("Doctor", command.ChatMessage));
+            }
+        }
     }
 }

ErgometerServer/DoctorSessionThread.cs

@@ -9,9 +9,10 @@ namespace ErgometerServer
 {
     class DoctorSessionThread
     {
-        private int session;
+        public int session { get; }
         private TcpClient client;
         private DoctorThread doctor;
+        private Boolean running;
 
         public DoctorSessionThread(int session, TcpClient client, DoctorThread doctor)
         {
@@ -22,7 +23,11 @@ namespace ErgometerServer
 
         public void run()
         {
-            
+            running = true;
+            while (running)
+            {
+                
+            }
         }
     }
 }

ErgometerServer/DoctorThread.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+using System;
+using System.Collections;
 using System.Net.Sockets;
 using System.Runtime.Remoting.Lifetime;
 using System.Threading;
@@ -12,7 +13,6 @@ namespace ErgometerServer
         Server server;
 
         string name;
-        ArrayList threads;
 
         bool running;
         bool loggedin;
@@ -23,7 +23,6 @@ namespace ErgometerServer
             this.client = client;
             this.server = server;
             this.name = "Unknown";
-            this.threads = new ArrayList();
             this.running = false;
             this.loggedin = false;
         }
@@ -34,19 +33,28 @@ namespace ErgometerServer
             loggedin = true;
             while (loggedin && running)
             {
-                if (threads.Count < server.clients.Count)
+                NetCommand input = NetHelper.ReadNetCommand(client);
+
+                switch (input.Type)
                 {
-                    DoctorSessionThread dt = new DoctorSessionThread(1, client, this);
-                    threads.Add(dt);
-                    Thread thread = new Thread(new ThreadStart(dt.run));
-                    thread.Start();
+                    case NetCommand.CommandType.LOGOUT:
+                        loggedin = false;
+                        Console.WriteLine("Doctor logged out");
+                        break;
+                    case NetCommand.CommandType.CHAT:
+                        server.sendToClient(input);
+                        Console.WriteLine(input);
+                        break;
+                    default:
+                        throw new FormatException("Unknown Command");
                 }
             }
+            client.Close();
         }
 
-        public void logout()
+        public void sendToDoctor(NetCommand command)
         {
-            loggedin = false;
+            NetHelper.SendNetCommand(client, command);
         }
     }
 }

ErgometerServer/Server.cs

@@ -73,14 +73,27 @@ namespace ErgometerServer
             thread.Start();
         }
 
-        public void sendToDoctor()
+        public void sendToDoctor(NetCommand command)
         {
-            
+            if (doctor != null)
+            {
+                doctor.sendToDoctor(command);
+            }
+            else
+            {
+                Console.WriteLine("No doctor connected to the server yet");
+            }
         }
 
-        public void sendToClient(int session)
+        public void sendToClient(NetCommand command)
         {
-            
+            foreach (ClientThread clientThread in clients)
+            {
+                if (clientThread.session == command.Session)
+                {
+                    clientThread.writeToClient(command);
+                }
+            }
         }
     }
 }