Visual C #. NET web program development-TCP (3)

When using the knowledge of the combined operation, the following example shows a simple network connection-communication between hosts, the application program is developed for the client and service end separately. Use the client to create a receiver to connect to the server, send a receiver to the client's master machine, and request a receiver to send the receiver's internal content; the receiver's master machine receives the token for self-use, and sends a confirmation token to the receiver, at the same time, it receives and displays the internal content of the client. On this basis, you can develop a chat room based on Program Statement (C!

Use the primary source code of the producer:



Public void sendmeg () // sends a message

{

Try

{

Int Port = int32.parse (textbox3.text. tostring (); // the local host

Try

{

Tcpclient = new tcpclient (textbox1.text, Port); // create a tcpclient object example}

Catch (exception le)

{

MessageBox. Show ("tcpclient error:" + Le. Message );

}

String strdateline = datetime. Now. tow.datestring () + "" + datetime. Now. tolongtimestring (); // obtain the sending end time

Netstream = tcpclient. getstream (); // get the network stream

Sw = new streamwriter (netstream); // creates a textwriter for the vertex character in the stream.

String words = textbox4.text; // The text to be sent.

String content = strdateline + words; // content to be sent

Sw. Write (content); // streams

Sw. Close (); // closes the upstream listener

Netstream. Close (); // link a network stream

Tcpclient. Close (); // The consumer uses the consumer terminal to connect

}

Catch (exception ex)

{

MessageBox. Show ("Sending Message failed! "+ Ex. Message );

}

Textbox4.text = ""; // clear

}

The main source region on the server side:



Public void startlisten () // when you want to listen to a specific port, please

{

// Receivemeg ();

Islinked = false; // tags

Try

{

Int Port = int32.parse (textbox1.text. tostring (); // The local port to be listened

Serverlistener = new tcplistener (port); // create an example of tcplistener

Serverlistener. Start (); // notify the listener

}

Catch (exception ex)

{

MessageBox. Show ("can't start server" + ex. Message );

Return;

}

Islinked = true;

While (true) // inbound unlimited cycle wait for the client to be connected

{

Try

{

Tcpclient = serverlistener. accepttcpclient (); // configure the receiver to connect to the image

Netstream = tcpclient. getstream (); // get the network stream

Sr = new streamreader (netstream); // stream generator

}

Catch (exception re)

{

MessageBox. Show (Re. Message );

}

String Buffer = "";

String received = "";

Serialized ed + = Sr. Readline (); // a row in the pipeline stream

While (received. length! = 0)

{

Buffer + = received;

Buffer + = "\ r \ n ";

// Received = "";

Written ED = Sr. Readline ();

}

Listbox1.items. Add (buffer); // display

// Relationship

Sr. Close ();

Netstream. Close ();

Tcpclient. Close ();

}

}