C#

Bind and Listen on a Randomly Selected Unused Port

See more Socket/SSL/TLS Examples

Demonstrates how to bind and listen on a randomly selected unused port.

Note:The ListenPort property used in this example is available starting in Chilkat v9.5.0.59.

C#

bool success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.Socket listenSocket = new Chilkat.Socket();

//  Pass a value of 0 for the port number to randomly select
//  an unused port.
//  (The 2nd argument allows for a backlog of 25 pending connection requests when accepting connections.)
success = listenSocket.BindAndListen(5555,25);
if (success != true) {
    Debug.WriteLine(listenSocket.LastErrorText);
    return;
}

//  Find out what port was chosen.
//  Note: The ListenPort propety was added in Chilkat v9.5.0.59
int listenPort = listenSocket.ListenPort;
Debug.WriteLine("Chosen listen port = " + Convert.ToString(listenPort));