Wait for a Socket to Become Readable

See more Socket/SSL/TLS Examples

Demonstrates Socket.SelectForReading, which waits for read-ready activity on the socket, or on any contained socket when the object is a socket set. It returns 1 if ready, 0 on timeout, or -1 on error.

Dim success As Boolean = False

Dim socket As New Chilkat.Socket

'  Connect to the server using TLS.
Dim bTls As Boolean = True
Dim maxWaitMs As Integer = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
If (success = False) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If


'  Wait up to 5 seconds for read-ready activity on the socket (or, for a socket set, on any contained
'  socket).  Returns 1 if ready, 0 on timeout, or -1 on error.
Dim ready As Integer = socket.SelectForReading(5000)
If (ready < 0) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If

If (ready <> 1) Then
    Debug.WriteLine("No data became available before the timeout.")
    Exit Sub
End If

Debug.WriteLine("The socket has data ready to read.")