C # socket programming for udp clients

C # socket programming for udp clients

This article mainly introduces c # socket programming for udp clients.

The Code is as follows:

Console. WriteLine ("This is a Client, host name is {0}", Dns. GetHostName ());

// Set the server end point

IPEndPoint ipe = new IPEndPoint (IPAddress. Parse ("127.0.0.1"), 8001 );

// Create a socket connected to the server, specify the network type, data connection type, and network protocol

Socket ConnSocket = new Socket (AddressFamily. InterNetwork, SocketType. Dgram, ProtocolType. Udp );

String welcome = "Client Message: Hello !!! ";

Byte [] data = new byte [1024];

Data = Encoding. ASCII. GetBytes (welcome );

// Send a Test message to the server

ConnSocket. SendTo (data, data. Length, SocketFlags. None, ipe );

IPEndPoint server = new IPEndPoint (IPAddress. Any, 0 );

// End point of the server

EndPoint Remote = (EndPoint) server;

Data = new byte [2, 1024];

// For IP addresses that do not exist, you can remove the blocking mode limit within the specified time after adding this line of code.

// Server. SetSocketOption (SocketOptionLevel. Socket, SocketOptionName. ReceiveTimeout, 100 );

Int recv = ConnSocket. ReceiveFrom (data, ref Remote );

// Print the information sent back from the server

Console. WriteLine ("Message received ed from {0}:", Remote. ToString ());

Console. WriteLine (Encoding. ASCII. GetString (data, 0, recv ));

While (true) // messages can be sent to the server in real time

{

String input = Console. ReadLine ();

If (input = "exit") // disconnect

{

ConnSocket. SendTo (Encoding. ASCII. GetBytes (input), Remote );

Data = new byte [2, 1024];

Recv = ConnSocket. ReceiveFrom (data, ref Remote );

Console. WriteLine (Encoding. ASCII. GetString (data, 0, recv ));

Break;

}

Else

{

ConnSocket. SendTo (Encoding. ASCII. GetBytes ("Client Message:" + input), Remote );

Data = new byte [2, 1024];

Recv = ConnSocket. ReceiveFrom (data, ref Remote );

Console. WriteLine (Encoding. ASCII. GetString (data, 0, recv ));

}

}

Console. WriteLine ("Stopping Client .");

ConnSocket. Close ();