I have recently been communicated with SOCKET, so I have organized some basic knowledge of the Socket and TCP protocol programming, so I will put it here, and will communicate some basic points for Socket asynchronous. Also organized. Socket Basic Programming
Server:
Using system.net;
Using system.net.sockets;
Using system.text;
Using system.threading;
Thread mythread;
Socket socket;
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
Socket.close (); // Release Resources
mythread.abort (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
Public static ipaddress getServerip ()
{
IPHOSTENTRY IEH = DNS.GETHOSTBYNAME (DNS.GETHOSTNAME ());
Return IEh.AddressList [0];
}
Private void beginlisten ()
{
Ipaddress serverip = get Serverip ();
IpendPoint IEP = New IpendPoint (ServerIP, 8000);
Socket = new socket (addressfamily.internetwork, sockettype.stream, protocoltype.tcp);
Byte [] bytemessage = new byte [100];
THIS.Label1.Text = IEP.TOString ();
Socket.bind (IEP);
// DO
While (True)
{
Try
{
Socket.listen (5);
Socket newsocket = socket.accept ();
Newsocket.Receive (ByteMessage);
String stime = datetime.now.toshorttimeString ();
String msg = stime ":" "Message from:";
Msg = news.remoteEndPoint.toString () encoding.default.getstring (byteMessage);
This.ListBox1.Items.Add (MSG);
}
Catch (socketexception ex)
{
THIS.LABEL1.TEXT = EX.TOSTRING ();
}
}
// while (byteMessage! = Null);
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Try
{
Mythread = New Thread (New ThreadStart (BeginListen));
mythread.start ();
}
Catch (System.exception ER)
{
Messagebox.show (Er.Message, "Complete", MessageBoxButtons.ok, MessageBoxicon.Stop;
}
Client:
Using system.net;
Using system.net.sockets;
Using system.text;
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Beginsend ();
}
Private void beginsend ()
{
String ip = this.txtip.text;
String port = this.txtport.text;
Ipaddress serverip = ipaddress.parse (IP);
INT ServerPort = Convert.Toint32 (Port);
IpendPoint IEP = New IpendPoint (ServerIP, Serverport);
Byte [] bytemessage;
// DO
// {
Socket Socket = New Socket (AddressFamily.InetNetwork, Sockettype.Stream, ProtocolType.tcp);
Socket.connect (IEP);
BYTEMESSAGE = Encoding.ASCII.GetBytes (TextBox1.text);
Socket.send (ByteMessage);
Socket.shutdown (socketshutdown.both);
Socket.close ();
//}
// while (byteMessage! = Null);
}
Transmit and receiving end based on TCP protocol
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
STATUSBAR1.TEXT = "Listening ...";
Tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
NSStream = tcclient.getStream (); // Get network base data stream for sending, receive data SRREAD = new streamreader (NSSTREAM); // Initialize the StreamReader instance with the obtained network base data
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen));
THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
PRIVATE TCPCPCLIENT TCPCLIENT;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1; private system.windows.forms.label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname;
Try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data flow for transferring data
SWRITER = New StreamWriter (NSSTream); // Initialize the StreamWriter instance using the obtained network base data stream
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
SWRITER.FLUSH (); // Refresh the data in the current data stream
NSSTream.close (); // Remove resources
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL) {
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
STATUSBAR1.TEXT = "Listening ...";
Tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
nsStream = tcclient.getStream (); // Get network base data flow used to send, receive data
SRREAD = New StreamReader (NSSTream); // Initialize the StreamReader instance with the obtained network basic data stream
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen));
THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
PRIVATE TCPCPCLIENT TCPCLIENT;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname;
Try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data streaming of transmitting data SWRITER = New StreamWriter; // Initializing the streamwriter instance using the obtained network base data
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
SWRITER.FLUSH (); // Refresh the data in the current data stream
NSSTream.close (); // Remove resources
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
Transmit and receiving end based on TCP protocol
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
Statusbar1.text = "Listening ..."; tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
nsStream = tcclient.getStream (); // Get network base data flow used to send, receive data
SRREAD = New StreamReader (NSSTream); // Initialize the StreamReader instance with the obtained network basic data stream
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen));
THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
PRIVATE TCPCPCLIENT TCPCLIENT;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname;
Try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data flow for transferring data
SWRITER = New StreamWriter (NSSTream); // Initialize the StreamWriter instance using the obtained network base data stream
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
Swriter.flush (); // Refresh the data in the current data stream nSSTream.close (); // Clear resource
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
STATUSBAR1.TEXT = "Listening ...";
Tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
nsStream = tcclient.getStream (); // Get network base data flow used to send, receive data
SRREAD = New StreamReader (NSSTream); // Initialize the StreamReader instance with the obtained network basic data stream
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen));
THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
PRIVATE TCPCPCLIENT TCPCLIENT;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname; try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data flow for transferring data
SWRITER = New StreamWriter (NSSTream); // Initialize the StreamWriter instance using the obtained network base data stream
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
SWRITER.FLUSH (); // Refresh the data in the current data stream
NSSTream.close (); // Remove resources
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
Server:
Using system.net;
Using system.net.sockets;
Using system.text;
Using system.threading;
Thread mythread;
Socket socket;
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
Socket.close (); // Release Resources
mythread.abort (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
Public static ipaddress getServerip ()
{
IPHOSTENTRY IEH = DNS.GETHOSTBYNAME (DNS.GETHOSTNAME ());
Return IEh.AddressList [0];
}
Private void beginlisten ()
{
Ipaddress serverip = get Serverip ();
IpendPoint IEP = New IpendPoint (ServerIP, 8000); socket = new socket (addressfamily.internetwork, sockettype.stream, protocoltype.tcp);
Byte [] bytemessage = new byte [100];
THIS.Label1.Text = IEP.TOString ();
Socket.bind (IEP);
// DO
While (True)
{
Try
{
Socket.listen (5);
Socket newsocket = socket.accept ();
Newsocket.Receive (ByteMessage);
String stime = datetime.now.toshorttimeString ();
String msg = stime ":" "Message from:";
Msg = news.remoteEndPoint.toString () encoding.default.getstring (byteMessage);
This.ListBox1.Items.Add (MSG);
}
Catch (socketexception ex)
{
THIS.LABEL1.TEXT = EX.TOSTRING ();
}
}
// while (byteMessage! = Null);
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Try
{
Mythread = New Thread (New ThreadStart (BeginListen));
mythread.start ();
}
Catch (System.exception ER)
{
Messagebox.show (Er.Message, "Complete", MessageBoxButtons.ok, MessageBoxicon.Stop;
}
}
Client:
Using system.net;
Using system.net.sockets;
Using system.text;
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Beginsend ();
}
Private void beginsend ()
{
String ip = this.txtip.text;
String port = this.txtport.text;
Ipaddress serverip = ipaddress.parse (IP);
INT ServerPort = Convert.Toint32 (Port);
IpendPoint IEP = New IpendPoint (ServerIP, Serverport);
Byte [] bytemessage;
// DO
// {
Socket Socket = New Socket (AddressFamily.InetNetwork, Sockettype.Stream, ProtocolType.tcp);
Socket.connect (IEP);
BYTEMESSAGE = Encoding.ASCII.GetBytes (TextBox1.text);
Socket.send (ByteMessage);
Socket.shutdown (socketshutdown.both);
Socket.close ();
//} // while (byteMessage! = Null);
}
Transmit and receiving end based on TCP protocol
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
STATUSBAR1.TEXT = "Listening ...";
Tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
nsStream = tcclient.getStream (); // Get network base data flow used to send, receive data
SRREAD = New StreamReader (NSSTream); // Initialize the StreamReader instance with the obtained network basic data stream
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen)); THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
PRIVATE TCPCPCLIENT TCPCLIENT;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname;
Try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data streaming of transmitting data SWRITER = New StreamWriter; // Initializing the streamwriter instance using the obtained network base data
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
SWRITER.FLUSH (); // Refresh the data in the current data stream
NSSTream.close (); // Remove resources
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
Statusbar1.text = "Listening ..."; tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
nsStream = tcclient.getStream (); // Get network base data flow used to send, receive data
SRREAD = New StreamReader (NSSTream); // Initialize the StreamReader instance with the obtained network basic data stream
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen));
THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
PRIVATE TCPCPCLIENT TCPCLIENT;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname;
Try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data flow for transferring data
SWRITER = New StreamWriter (NSSTream); // Initialize the StreamWriter instance using the obtained network base data stream
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
Swriter.flush (); // Refresh the data in the current data stream nSSTream.close (); // Clear resource
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
Transmit and receiving end based on TCP protocol
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
STATUSBAR1.TEXT = "Listening ...";
Tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
nsStream = tcclient.getStream (); // Get network base data flow used to send, receive data
SRREAD = New StreamReader (NSSTream); // Initialize the StreamReader instance with the obtained network basic data stream
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen));
THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
PRIVATE TCPCPCLIENT TCPCLIENT;
Private system.windows.Forms.Button button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname; try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data flow for transferring data
SWRITER = New StreamWriter (NSSTream); // Initialize the StreamWriter instance using the obtained network base data stream
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
SWRITER.FLUSH (); // Refresh the data in the current data stream
NSSTream.close (); // Remove resources
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol receiving end
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Use the StreamReader class
INT port = 8000; // Defines the listening port number
Private thread thisreadread; // Create a thread to listen to the port number, receive information
Private tcplistener tltcplisten; // Listening port number
Private bool blistener = true; // Set the marking bit, determine the listening state
Private networkStream nsstream; // Create a receiving basic data stream
Private streamreader srread;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Button button1;
Private system.windows.forms.listbox listbox1; // read data from the network base data stream
PRIVATE TCPCLIENT TCCLIENT;
Private void listen ()
{
Try
{
TLTCPLISTEN = New TCPListener (port); // Initialize the TCPListener instance with an 8000 port number
TLTCPListen.Start (); // Start listening
STATUSBAR1.TEXT = "Listening ...";
Tcclient = tltcplisten.acceptttcpclient (); // Request by TCP connection
nsStream = tcclient.getStream (); // Get network base data flow used to send, receive data
SRREAD = New StreamReader (NSSTream); // Initialize the StreamReader instance with the obtained network basic data stream
Statusbar1.text = "It has been connected!";
While (blistener) // loop listening
{
String SMESSAGE = SRREAD.READLINE (); // Read a line of data from the network underlying data stream
IF (SMESSAGE == "STOP") // Determine if the TCP connection control code is disconnected
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close (); // Release Resources
Srread.close ();
Statusbar1.text = "The connection is closed!";
THTHREADREAD.ABORT (); // Abort thread
Return;
}
String Stime = DateTime.now.toshostTimeString (); // Get time when receiving data
ListBox1.Items.add (Stime " SMESSAGE);
}
}
Catch (System.Security.securityException)
{
Messagebox.show ("Listening Failed!", "Error");
}
}
// Start listening
Private void Button1_Click (Object Sender, System.Eventargs E)
{
ThthreadRead = New Thread (New ThreadStart (Listen));
THTHREADREAD.START (); // Start thread
Button1.enabled = false;
}
// Clean all the resources being used.
Protected Override Void Dispose (Bool Disposing)
{
Try
{
TLTCPLISTEN.STOP (); // Turn the listener
NSSTream.close ();
SRREAD.CLOSE (); // Release Resources
THTHREADREAD.ABORT (); // Abort thread
}
Catch {}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
TCP protocol
Using system.net.sockets; // Used to TCPListen
Using system.threading; // Using thread
Using system.io; // Using the streamwriter class
Using system.net; // use iPaddress class, iPhostentry class, etc.
Private streamwriter swwriter; // to send data to network basic data
Private networkStream nsstream; // Create a network base data of sending data
Private tclient tclient; private system.windows.Forms.Button Button1;
Private system.windows.Forms.TextBox textBox1;
Private system.windows.Forms.Button Button2;
Private system.windows.Forms.TextBox textBox2;
Private system.windows.Forms.statusbar statusbar1;
Private system.windows.Forms.Label label1;
Private system.windows.forms.label label2; // Propose TCP connection to the remote host by it
Private bool tcpconnect = false; // Defines the identifier to indicate whether the TCP connection is established.
//connection
Private void Button1_Click (Object Sender, System.Eventargs E)
{
Ipaddress ipremote;
Try
{
ipremote = ipaddress.parse (TextBox1.text);
}
Catch // judges the legality of a given IP address
{
Messagebox.show ("Enter IP address is not legal!", "Error Tip!");
Return;
}
IPHOSTENTRY iphost;
Try
{
iPhost = DNS.Resolve (TextBox1.text);
}
Catch // Determine whether the IP address corresponds to whether the host is online
{
Messagebox.show ("Remote Host is not online!", "Error Tip!");
Return;
}
String Shostname = iphost.hostname;
Try
{
TCPCLIENT TCPCLIENT = New TcpClient (ShostName, 8000); / / Propose TCP Connection Application for the 8000 port of the remote host
nsStream = tcpclient.getStream (); // By requesting, and obtaining network basic data flow for transferring data
SWRITER = New StreamWriter (NSSTream); // Initialize the StreamWriter instance using the obtained network base data stream
Button1.enabled = false;
Button2.enabled = True;
TcpConnect = true;
Statusbar1.text = "It has been connected!";
}
Catch
{
MessageBox.show ("Unable to establish a connection with the remote host 8000 port!", "Error Tip!");
Return;
}
}
//send
Private void button2_click (Object Sender, System.Eventargs E)
{
IF (TextBox2.text! = ")
{
SWRITER.WRITELINE (TextBox2.text); // Refresh the data in the current data stream
SWRITER.FLUSH ();
}
Else
{
Messagebox.show ("Send information cannot be empty!", "Error Tip!");
}
}
// Clean all the resources being used.
Protected Override Void Dispose (BOOL Disposing) {
IF (TCPConnect)
{
SWRITER.WRITELINE ("STOP"); // Send control code
SWRITER.FLUSH (); // Refresh the data in the current data stream
NSSTream.close (); // Remove resources
SWRITER.CLOSE ();
}
IF (Disposing)
{
IF (Components! = NULL)
{
Components.dispose ();
}
}
Base.dispose (Disposing);
}
