Developing socket communications using C #

The following example shows how to use the Socket class to send data and receive a response to an HTTP server.

[C #]
public string Dosocketget (string server)
{
Sets up variables and a string to write to the server
Encoding ASCII = encoding.ascii;
String get = "Get/http/1.1\r\nhost:" + server +
"\r\nconnection:close\r\n\r\n";
byte[] Byteget = ASCII. GetBytes (get);
byte[] recvbytes = new byte[256];
String strretpage = null;

IPAddress and IPEndPoint represent the endpoint that would
Receive the request.
Get the "the" in the list using DNS.
IPAddress Hostadd = dns.resolve (server). ADDRESSLIST[0];
IPEndPoint ephost = new IPEndPoint (Hostadd, 80);

Creates the Socket for sending data over TCP.
Socket s = new socket (AddressFamily.InterNetwork, SocketType.Stream,
PROTOCOLTYPE.TCP);

Connects to the host using IPEndPoint.
S.connect (Ephost);
if (!s.connected)
{
Strretpage = "Unable to connect to host";
return strretpage;
}

Sends the get-text to the host.
S.send (Byteget, Byteget.length, Socketflags.none);

Receives the page, looping until all bytes are received
Int32 bytes = s.receive (recvbytes, recvbytes.length, 0);
Strretpage = "Default HTML page on" + server + ": \ r \ n";
Strretpage = Strretpage + ASCII. GetString (recvbytes, 0, bytes);

while (bytes > 0)
{
bytes = S.receive (recvbytes, Recvbytes.length, Socketflags.none);
Strretpage = Strretpage + ASCII. GetString (recvbytes, 0, bytes);
}
Call S.close () if you want to close the connection now;
return strretpage;
}