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POSend a list of class objects through a socket or tcp
 

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  1. POSend a list of class objects through a socket or tcp
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    <p>I'm trying to send a list of objects to another computer. I'm new to sockets and such but have tried quite a few things. In the end I always end up with errors and can't get past them. </p> <p>The list of objects I'm sending are classes with functions, variables and properties. I have placed the [Serializable] at the top of this class.</p> <p>Each time a client performs a certain action it will change the San_Change to true and start the client thread. </p> <p>I've attached my code below, and any help would be appreciated.</p> <pre><code> public void Create_Network_Thread(string Host_Or_Client) { //This creates a network thread and starts it. //Host if (Host_Or_Client == "Host") { Host_networkThread = new Thread(new ThreadStart(Host_Network_Thread_Start)); Host_networkThread.Start(); } //Client else { Client_networkThread = new Thread(new ThreadStart(Client_Network_Thread_Start)); Client_networkThread.Start(); } } private void Host_Network_Thread_Start() { try { TcpListener serverSocket = new TcpListener(8888); TcpClient clientSocket = default(TcpClient); serverSocket.Start(); clientSocket = serverSocket.AcceptTcpClient(); while (true) { object San_Object; NetworkStream networkStream = clientSocket.GetStream(); byte[] bytesFrom = new byte[clientSocket.Available]; networkStream.Read(bytesFrom, 0, clientSocket.Available); San_Object = ByteArrayToObject(bytesFrom); San_List = (List&lt;San&gt;)San_Object; byte[] sendBytes = ObjectToByteArray(San_Object); networkStream.Write(sendBytes, 0, sendBytes.Length); networkStream.Flush(); } } catch (Exception e) { Console.WriteLine(e.ToString()); } } private void Client_Network_Thread_Start() { while (true) { if (San_Change == true) { San_Change = false; try { System.Net.Sockets.TcpClient clientSocket = new System.Net.Sockets.TcpClient(); object San_Object = San_List; string cur_ip = ""; clientSocket.Connect(cur_ip, 8888); NetworkStream serverStream = clientSocket.GetStream(); byte[] outStream = ObjectToByteArray(San_Object); serverStream.Write(outStream, 0, outStream.Length); serverStream.Flush(); byte[] inStream = new byte[(int)clientSocket.ReceiveBufferSize]; San_Object = ByteArrayToObject(inStream); San_List = (List&lt;San&gt;)San_Object; } catch (Exception e) { Console.WriteLine(e.ToString()); } } } } private byte[] ObjectToByteArray(Object obj) { if (obj == null) return null; BinaryFormatter bf = new BinaryFormatter(); MemoryStream ms = new MemoryStream(); bf.Serialize(ms, obj); return ms.ToArray(); } private Object ByteArrayToObject(byte[] arrBytes) { MemoryStream memStream = new MemoryStream(); BinaryFormatter binForm = new BinaryFormatter(); memStream.Write(arrBytes, 0, arrBytes.Length); memStream.Seek(0, SeekOrigin.Begin); Object obj = (Object)binForm.Deserialize(memStream); return obj; } } </code></pre> <p>When ran this occurs:</p> <p>Forgot to add this in, but when I run this as it is the code fails. Here is the information, hope this helps. Thanks again.</p> <pre><code>e {System.Runtime.Serialization.SerializationException: Binary stream '0' does not contain a valid BinaryHeader. Possible causes are invalid stream or object version change between serialization and deserialization. at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run() at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream) at San_Player_V2.Game.ByteArrayToObject(Byte[] arrBytes) in San_Player_V2\Game.cs:line 573 at San_Player_V2.Game.Client_Network_Thread_Start() in San_Player_V2\Game.cs:line 477} System.Exception {System.Runtime.Serialization.SerializationException} </code></pre>
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    1. COAdded in callstack information.
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    2. COyou can edit your original post, the 'edit' button is below the tags at the bottom of your question
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    3. COThe error indicates that you probably either are 1. trying to deserialize with a different class definition than you serialized with, or 2. trying to deserialize invalid bytes. Since you appear to have the same code on the client and server, I doubt 1. is the issue, so check that the bytes being sent and received are the same length and contents.
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