C#

Async Accept Socket Connection

See more Socket/SSL/TLS Examples

Demonstrates how to get the connected client socket after accepting a connection asynchronously. C#

bool success = false;

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

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

//  Bind to a port and listen.
//  This example will listen at port 5555 and allows for a backlog
//  of 25 pending connection requests.
success = listenSocket.BindAndListen(5555,25);
if (success != true) {
    Debug.WriteLine(listenSocket.LastErrorText);
    return;
}

//  Start a background task to accept an incoming connection ...
int maxWaitMs = 20000;
Chilkat.Task acceptTask = listenSocket.AcceptNextConnectionAsync(maxWaitMs);
acceptTask.Run();

//  ...
//  ...
//  ...

//  Imagine at this point the task has completed successfully,
//  and a connection was accepted.  Here's how to get the connected socket...
Chilkat.Socket connectedClient = new Chilkat.Socket();
success = connectedClient.LoadTaskResult(acceptTask);

//  Here's how it works:  The AcceptNextConnection method would normally
//  return a socket object when called synchronously.  When called asynchronously,
//  it cannot do so because it returns the task object.  When the async method
//  (running in a background thread) completes, the socket object that is the client
//  connection is contained within the task object.
//  
//  This can be generalized for any case where a Chilkat method returns an object.
//  The async version of that method is such that the object returned in the background
//  thread is contained within the task object.

//  To get the result object, we create a new object instance of that type.
//  In this case, we create a socket object (connectedClient).  There is a LoadTaskResult
//  method in all Chilkat classes that can be a return value of an async method call.
//  The LoadTaskResult method transfers the returned object from the task to the caller.