Socket programming network chat

/// Note: the following code is copied and executed in three console programs.

/// Step 1: Create a class library for serialization and pass

[System. serializable]
Public class filetest
{
Private string name;

Private int age;

Private string message;

Public String message
{
Get {return message ;}
Set {message = value ;}
}

Public int age
{
Get {return age ;}
Set {age = value ;}
}

Public string name
{
Get {return name ;}
Set {name = value ;}
}
}

// Step 2: server code

 

Class Program
{
Static void main ()
{
New Program (). gettarget ();
}

System. collections. generic. dictionary <string, system. net. sockets. tcpclient> DR = new system. collections. generic. dictionary <string, system. net. sockets. tcpclient> ();

// After obtaining the connection object, create a thread and execute the new connection (read and write)
Private void gettarget ()
{
System. net. sockets. tcplistener TL = new system. net. sockets. tcplistener (system. net. IPaddress. parse ("127.0.0.1"), 2009 );

TL. Start ();

While (true)
{
System. net. sockets. tcpclient Tc = tl. accepttcpclient ();
System. datetime dt = system. datetime. now;
String S = DT. tostring ("yymmddhhmmss") + dt. millisecond. tostring ();
Dr. Add (S, Tc );
System. Threading. Thread th = new system. Threading. Thread (getmessage );
Th. Name = s;
Th. isbackground = true;
Th. Start (TC );
System. Threading. thread. Sleep (1 );
}
}

Private void getmessage (Object O)
{
System. net. sockets. tcpclient Tc = (system. net. sockets. tcpclient) O;
System. net. sockets. networkstream NS = tc. getstream ();
System. runtime. serialization. iformatter formatter = new system. runtime. serialization. formatters. Binary. binaryformatter ();
Try
{
While (true)
{
Filetest Ft = (filetest) formatter. deserialize (NS );
System. Console. writeline (FT. Message );
Foreach (system. Collections. Generic. keyvaluepair <string, system. net. sockets. tcpclient> SCG in DR)
{
System. net. sockets. tcpclient TT = SCG. value;
System. net. sockets. networkstream NNS = TT. getstream ();
Formatter. serialize (NNS, ft );
}
}
}
Catch (system. Exception E)
{
Dr. Remove (system. Threading. thread. currentthread. Name );
System. Threading. thread. currentthread. Abort ();
}

}
}

// Step 3: client code

 

Class Program
{
Static void main ()
{
System. net. sockets. tcpclient Tc = new system. net. sockets. tcpclient ();
TC. Connect (system. net. IPaddress. parse ("127.0.0.1"), 2009 );
System. net. sockets. networkstream NS = tc. getstream ();
System. Threading. Thread th = new system. Threading. Thread (sendmessage );
Th. isbackground = true;
Th. Start (NS );
System. Threading. Thread Th1 = new system. Threading. Thread (getmessage );
Th. isbackground = true;
Th2.start (NS );
}

Private Static void sendmessage (Object O)
{
System. net. sockets. networkstream NS = (system. net. sockets. networkstream) O;
System. runtime. serialization. iformatter formatter = new system. runtime. serialization. formatters. Binary. binaryformatter ();
Try
{
While (true)
{
String S = system. Console. Readline ();
Filetest Ft = new filetest ();
Ft. Message = s;
Formatter. serialize (NS, ft );
}
}
Catch (system. Exception E)
{
System. Console. writeline ("error: {0}", E. Message );
}
}

Private Static void getmessage (Object O)
{
System. runtime. serialization. iformatter formatter = new system. runtime. serialization. formatters. Binary. binaryformatter ();
System. net. sockets. networkstream nw = (system. net. sockets. networkstream) O;
Try
{
While (true)
{
Filetest Ft = (filetest) formatter. deserialize (NW );
System. Console. writeline (FT. Message );
}
}
Catch (system. Exception E)
{
System. Console. writeline ("error: {0}", E. Message );
System. Console. Readline ();
System. environment. Exit (0 );
}

}

}