I am making a client-server program. There are two client forms and one server form. Program works perfect for 1v1 connection but the other machine can't connect when the one has connection with server. I want to make with multiclients.
Here the codes.
Server.cs
private TcpListener ConnectionListener;//variable needed to listen for connections
private BinaryReader MessageReader;//variable for reading messages
private BinaryWriter MessageWriter;//variable for writing messages
private Socket ClientConnection = new Socket(System.Net.Sockets.AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//variable for holding the client connection
private NetworkStream DataStream;//variable for keeping server and client in a stream and synchronized
private Thread ListeningThread;//variable that is assigned to a thread listening for incoming connections and preventing the pc from blocking
public Form1()
{
InitializeComponent();
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
System.Environment.Exit(System.Environment.ExitCode);//exit and close all threads and release all recources
}
//functions used for networks
private void ListenForConnections()
{
//try listening with the given ip address
try
{
ConnectionListener = new TcpListener(IPAddress.Parse(txt_Ip.Text), 80);//listen to given ip on port 80 allways
ConnectionListener.Start();//start listening;
ChangeTextBoxContent("Bağlantılar Dinleniyor.");
ClientConnection = ConnectionListener.AcceptSocket();//wait untill client connects (blocking function) if connected return a socket
DataStream = new NetworkStream(ClientConnection);//initialize a stream
MessageReader = new BinaryReader(DataStream);//use reader within the stream
MessageWriter = new BinaryWriter(DataStream);//use writer within the stream
ChangeTextBoxContent("Bağlantı Alındı.");
Thread acceptThread = new Thread(new ThreadStart(HandleConnection));
acceptThread.Start();
MessageReader.Close();//close the reader;
MessageWriter.Close();//close the writer;
DataStream.Close();//close the stream;
ClientConnection.Close();//close thre connection
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());//signal the error in a message box
}
}
private void HandleConnection()
{
string message;
//loop until infinity
do
{
//try reading from the data stream if anything went wrong with the connection break
try
{
message = MessageReader.ReadString();//read message
ChangeTextBoxContent(message);//call the function that manipulates text box from a thread and change the contents.
}
catch (Exception)
{
ChangeTextBoxContent("Bağlantı Kayboldu.");
break;//get out of the while loop
}
} while (true);
}
private void ChangeTextBoxContent(string tx)
{
if (txt_mesajlar.InvokeRequired)//if the messages text box needs a delegate invoking
{
Invoke(new UpdateTextBox(ChangeTextBoxContent), new object[] { tx });
}
else
{
//if no invoking required then change
txt_mesajlar.Text += tx + "\r\n";//concatinate the original with the given message and a new line
}
}
private void btn_start_listen_Click(object sender, EventArgs e)
{
try
{
IPAddress.Parse(txt_Ip.Text);//
ListeningThread = new Thread(new ThreadStart(ListenForConnections));//assign thread variable with the blocking function
ListeningThread.Start();//start the thread that will wait for connections
}
catch (Exception)
{
MessageBox.Show("Yanlış Ip Adresi");//signal the error in a message box
}
}
And Clients' code
private TcpClient Client;//variable needed to listen for connections
private BinaryReader MessageReader;//variable for reading messages
private BinaryWriter MessageWriter;//variable for writing messages
private NetworkStream DataStream;//variable for keeping server and client in a stream and synchronized
private Thread ClientThread;//variable that is assigned to a thread listening for incoming connections and preventing the pc from blocking
public int MachineState = 0; // active-passive state
public int MachineStatus = 0; // on-off state
public string MachineName = "Cnc1";
public int counterfortimerdebug = 0;
public Form1()
{
InitializeComponent();
MachineStatus = 1; // Machine Opened
try
{
MachineState = 1;
IPAddress.Parse("127.0.0.1");
ClientThread = new Thread(new ThreadStart(PerformConnection));
ClientThread.Start();
}
catch (Exception Ex)
{
MessageBox.Show(Ex.ToString());
}
}
private void Form1_Load(object sender, EventArgs e)
{
lb_gcodes.Items.Add("01000");
lb_gcodes.Items.Add("T1 M6");
lb_gcodes.Items.Add("G0 G90 G40 G21 G17 G94 G80");
lb_gcodes.Items.Add("G54 X-75 Y-25 S500 M3");
lb_gcodes.Items.Add("G43 Z100 H1");
lb_gcodes.Items.Add("Z5");
lb_gcodes.Items.Add("G1 Z-20 F100");
lb_gcodes.Items.Add("X-50 M8");
lb_gcodes.Items.Add("X0 Y50");
lb_gcodes.Items.Add("X50 Y0");
lb_gcodes.Items.Add("G0 Z100");
lb_gcodes.Items.Add("M30");
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
System.Environment.Exit(System.Environment.ExitCode);//exit and close all threads and release all recources
}
//network functions used
private void PerformConnection()
{
try
{
Client = new TcpClient();
ChangeTextBoxContent("Bağlanıyor......");
Client.Connect(IPAddress.Parse("127.0.0.1"), 80);
DataStream = Client.GetStream();
MessageReader = new BinaryReader(DataStream);
MessageWriter = new BinaryWriter(DataStream);
MessageWriter.Write(MachineName + " " + "Bağlandı..");
ChangeTextBoxContent("Bağlandı..");
HandleConnection();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
private void HandleConnection()
{
string message;
//loop until infinity
do
{
//try reading from the data stream if anything went wrong with the connection break
try
{
message = MessageReader.ReadString();//read message
ChangeTextBoxContent(message);//call the function that manipulates text box from a thread and change the contents.
}
catch (Exception ex)
{
ChangeTextBoxContent(ex.ToString());
break;
}
} while (true);
}
private void ChangeTextBoxContent(string tx)
{
if (txt_mesajlar.InvokeRequired)
{
Invoke(new UpdateTextBox(ChangeTextBoxContent), new object[] { tx });
}
else
{
//if no invoking required then change
txt_mesajlar.Text += tx + "\r\n";//concatinate the original with the given message and a new line
}
}
Thanks for any help.
答案 0 :(得分：0)
只需更新方法并添加bool变量即可停止监听：
private void ListenForConnections()
{
while(!IsStopped)
//try listening with the given ip address
....
}
}
答案 1 :(得分：0)
你可以看到我的班级具有相同的功能：
public delegate void Message(string message, IPAddress from);
public class Listener : IDisposable
{
private readonly TcpListener _tcp;
private Message _OnRecieve;
private Thread _listenThread;
private bool IsStopped = false;
public Listener(IPAddress ip, int port, Message f)
{
_tcp = new TcpListener(ip, port);
_OnRecieve = f;
}
public void Start()
{
_listenThread = new Thread(ListenForClients);
_listenThread.Start();
}
public void Stop()
{
if (_tcp != null)
{
_listenThread.Abort();
_tcp.Stop();
IsStopped = true;
}
}
private void ListenForClients()
{
_tcp.Start();
while (!IsStopped)
{
TcpClient client = _tcp.AcceptTcpClient();
var clientThread = new Thread(HandleClientComm);
clientThread.Start(client);
}
}
private void HandleClientComm(object client)
{
ReadMessage((TcpClient)client);
}
void IDisposable.Dispose()
{
if (_tcp != null)
{
_listenThread.Abort();
_tcp.Stop();
IsStopped = true;
}
}
private void ReadMessage(TcpClient client)
{
try
{
NetworkStream ns = client.GetStream();
string msg = ... /// read message
_OnRecieve(msg,client.(client.Client.RemoteEndPoint as IPEndPoint).Address;
client.Close();
}
catch (Exception exc)
{
client.Close();
throw exc;
}
}
}
和用法：
public void NetworkGet(string s, System.Net.IPAddress ip)
{
// do anything
}
public Server()
{
listener = new Network.Listener(System.Net.IPAddress.Any, Properties.Main.Default.NetworkPort, NetworkGet);
listener.Start();
}