Server Client send receive simple text

Question

I have a homework to build an application which will send and receive simple string between server and client  I know how to establish connection  but don t know how to send and receive string  This is my code     public partial class Form1   Form       private Thread n server      private Thread n client      private Thread n send server      private TcpClient client      private TcpListener listener      private int port   2222      private string IP            private Socket socket      public Form1                 InitializeComponent               private void exitToolStripMenuItem Click object sender  EventArgs e                Application Exit               public void Server                 listener   new TcpListener IPAddress Any  port           listener Start            try                       socket   listener AcceptSocket                if  socket Connected                                textBox2 Invoke  MethodInvoker delegate   textBox2 Text    Client       socket RemoteEndPoint ToString                                        catch                                public void Client                 IP    localhost           client   new TcpClient            try                       client Connect IP  port                      catch  Exception ex                        MessageBox Show  Error       ex Message                      if  client Connected                        textBox3 Invoke  MethodInvoker delegate   textBox3 Text    Connected                                private void button1 Click object sender  EventArgs e                n server   new Thread new ThreadStart Server             n server IsBackground   true          n server Start            textBox1 Text    Server up              private void button2 Click object sender  EventArgs e                n client   new Thread new ThreadStart Client            n client IsBackground   true          n client Start               private void send                    I want to use this method for both buttons    send button  on server side    and  send button             on client side  First I read text from textbox2 on server side or textbox3            on client side than accept and write the string to label2 s  or label3 c                           private void button3 Click object sender  EventArgs e                n send server   new Thread new ThreadStart send            n send server IsBackground   true          n send server Start

User · Answer

bool SendReceiveTCP string ipAddress  string sendMsg  ref string recMsg                try                       DateTime startTime new DateTime                TcpClient clt   new TcpClient                clt Connect ipAddress  8001               NetworkStream nts   clt GetStream                nts Write Encoding ASCII GetBytes sendMsg  0  sendMsg Length               startTime   DateTime Now              while  true                                if  nts DataAvailable                                        byte   tmpBuff   new byte 1024                       System Threading Thread Sleep 100                       int readOut nts Read tmpBuff  0  1024                       if  readOut  gt  0                                                recMsg   Encoding ASCII GetString tmpBuff  0  readOut                           nts Close                            clt Close                            return true                                            else                                               nts Close                            clt Close                            return false                                                          TimeSpan tps   DateTime Now - startTime                  if  tps TotalMilliseconds  gt  2000                                        nts Close                        clt Close                        return false                                    System Threading Thread Sleep 50                                   catch  Exception ex                        throw ex

User · Answer

public partial class Form1   Form               private Thread n server          private Thread n client          private Thread n send server          private TcpClient client          private TcpListener listener          private int port   2222          private string IP                private Socket socket          byte   bufferReceive   new byte 4096           byte   bufferSend   new byte 4096           public Form1                         InitializeComponent                       private void exitToolStripMenuItem Click object sender  EventArgs e                        Application Exit                       public void Server                         listener   new TcpListener IPAddress Any  port               listener Start                try                               socket   listener AcceptSocket                    if  socket Connected                                        textBox3 Invoke  MethodInvoker delegate   textBox3 Text    Client              socket RemoteEndPoint ToString                                          while  true                                        int length   socket Receive bufferReceive                       if  length  gt  0                                                label2 Invoke  MethodInvoker delegate   label2 Text   Encoding Unicode GetString bufferReceive                                                                         catch                                                public void Client                         IP    localhost               client   new TcpClient                try                               client Connect IP  port                   while  true                                        NetworkStream nts   client GetStream                        int length                      while   length   nts Read bufferReceive  0  bufferReceive Length      0                                               label3 Invoke  MethodInvoker delegate   label3 Text   Encoding Unicode GetString bufferReceive                                                                          catch  Exception ex                                MessageBox Show  Error       ex Message                              if  client Connected                                textBox3 Invoke  MethodInvoker delegate   textBox3 Text    Connected                                            private void button1 Click object sender  EventArgs e                        n server   new Thread new ThreadStart Server                n server IsBackground   true              n server Start                textBox1 Text    Server up                      private void button2 Click object sender  EventArgs e                        n client   new Thread new ThreadStart Client                n client IsBackground   true              n client Start                       private void send                         if  socket  null                                bufferSend   Encoding Unicode GetBytes textBox2 Text                   socket Send bufferSend                             else                               if  client Connected                                        bufferSend   Encoding Unicode GetBytes textBox3 Text                       NetworkStream nts   client GetStream                        if  nts CanWrite                                                nts Write bufferSend 0 bufferSend Length                                                                               private void button3 Click object sender  EventArgs e                        n send server   new Thread new ThreadStart send                n send server IsBackground   true              n send server Start

User · Answer

The following code send and recieve the current date and time from and to the server    The following code is for the server application   namespace Server       class Program               const int PORT NO   5000          const string SERVER IP    127 0 0 1            static void Main string   args                          ---listen at the specified IP and port no ---             IPAddress localAdd   IPAddress Parse SERVER IP               TcpListener listener   new TcpListener localAdd  PORT NO               Console WriteLine  Listening                   listener Start                   ---incoming client connected---             TcpClient client   listener AcceptTcpClient                   ---get the incoming data through a network stream---             NetworkStream nwStream   client GetStream                byte   buffer   new byte client ReceiveBufferSize                  ---read incoming stream---             int bytesRead   nwStream Read buffer  0  client ReceiveBufferSize                  ---convert the data received into a string---             string dataReceived   Encoding ASCII GetString buffer  0  bytesRead               Console WriteLine  Received       dataReceived                  ---write back the text to the client---             Console WriteLine  Sending back       dataReceived               nwStream Write buffer  0  bytesRead               client Close                listener Stop                Console ReadLine                          this is the code for the client  namespace Client       class Program               const int PORT NO   5000          const string SERVER IP    127 0 0 1           static void Main string   args                          ---data to send to the server---             string textToSend   DateTime Now ToString                   ---create a TCPClient object at the IP and port no ---             TcpClient client   new TcpClient SERVER IP  PORT NO               NetworkStream nwStream   client GetStream                byte   bytesToSend   ASCIIEncoding ASCII GetBytes textToSend                  ---send the text---             Console WriteLine  Sending       textToSend               nwStream Write bytesToSend  0  bytesToSend Length                  ---read back the text---             byte   bytesToRead   new byte client ReceiveBufferSize               int bytesRead   nwStream Read bytesToRead  0  client ReceiveBufferSize               Console WriteLine  Received       Encoding ASCII GetString bytesToRead  0  bytesRead                Console ReadLine                client Close

User · Answer

static void Main string   args                  ---listen at the specified IP and port no ---         IPAddress localAdd   IPAddress Parse SERVER IP           TcpListener listener   new TcpListener localAdd  PORT NO           Console WriteLine  Listening               listener Start            while  true                          ---incoming client connected---             TcpClient client   listener AcceptTcpClient                   ---get the incoming data through a network stream---             NetworkStream nwStream   client GetStream                byte   buffer   new byte client ReceiveBufferSize                  ---read incoming stream---             int bytesRead   nwStream Read buffer  0  client ReceiveBufferSize                  ---convert the data received into a string---             string dataReceived   Encoding ASCII GetString buffer  0  bytesRead               Console WriteLine  Received       dataReceived                  ---write back the text to the client---             Console WriteLine  Sending back       dataReceived               nwStream Write buffer  0  bytesRead               client Close                      listener Stop            Console ReadLine            In addition to  Nudier Mena answer  keep a while loop to keep the server in listening mode  So that we can have multiple instance of client connected

User · Answer

Server   namespace SocketServer           class Program               static Socket klient           static void Main string   args                        Socket server   new Socket AddressFamily InterNetwork  SocketType Stream  ProtocolType Tcp                IPEndPoint endPoint   new IPEndPoint IPAddress Any  8888                server Bind endPoint               server Listen 20               while true                                Console WriteLine  Waiting                       klient   server Accept                     Console WriteLine  Client connected                    Task t   new Task ServisClient                   t Start                                     static void ServisClient                         try                               while  true                                        byte   buffer   new byte 64                       Console WriteLine  Waiting for answer                           klient Receive buffer  0  buffer Length  0                       string message   Encoding UTF8 GetString buffer                       Console WriteLine  Answer      message                        string answer    Actualy date is     DateTime Now                      buffer   Encoding UTF8 GetBytes answer                       Console WriteLine  Sending  0    answer                       klient Send buffer                                               catch                               Console WriteLine  Disconnected

User · Answer

CLIENT  namespace SocketKlient        class Program                static Socket Klient          static IPEndPoint endPoint          static void Main string   args                        Klient   new Socket AddressFamily InterNetwork  SocketType Stream  ProtocolType Tcp               string command              Console WriteLine  Write IP address                command   Console ReadLine                IPAddress Address              while  IPAddress TryParse command  out Address                                  Console WriteLine  wrong IP format                    command   Console ReadLine                              Console WriteLine  Write port                command   Console ReadLine                 int port              while   int TryParse command  out port   amp  amp  port  gt  0                                Console WriteLine  Wrong port number                    command   Console ReadLine                              endPoint   new IPEndPoint Address  port                ConnectC Address  port               while Klient Connected                                Console ReadLine                    Odesli                                     public static void ConnectC IPAddress ip  int port                        IPEndPoint endPoint   new IPEndPoint ip  port               Console WriteLine  Connecting                   try                               Klient Connect endPoint                   Console WriteLine  Connected                               catch                               Console WriteLine  Connection fail                     return                             Task t   new Task WaitForMessages                t Start                        public static void SendM                         string message    Actualy date is     DateTime Now               byte   buffer   Encoding UTF8 GetBytes message               Console WriteLine  Sending      message               Klient Send buffer                      public static void WaitForMessages                         try                               while  true                                        byte   buffer   new byte 64                        Console WriteLine  Waiting for answer                        Klient Receive buffer  0  buffer Length  0                         string message   Encoding UTF8 GetString buffer                        Console WriteLine  Answer      message                                                catch                               Console WriteLine  Disconnected

[c#] Server Client send/receive simple text

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