Listening Port Permanently. if file is on my stream, Get file. How to?

Answer 1

In this tutorial, they open the port and then it waits to accept a connection, instead of popping up a messagebox when there's not connction:

http://www.eggheadcafe.com/articles/20020323.asp

Here's a stripped down version of their code - consider using this layout instead:

Imports System.Net.Sockets
Imports System.Text
Class TCPSrv
    Shared Sub Main()
        ' Must listen on correct port- must be same as port client wants to connect on.
        Const portNumber As Integer = 51124
        Dim tcpListener As New TcpListener(portNumber)
        tcpListener.Start()
        Console.WriteLine("Waiting for connection...")
        Try
            'Accept the pending client connection and return 
            'a TcpClient initialized for communication. 
            Dim tcpClient As TcpClient = tcpListener.AcceptTcpClient()
            Console.WriteLine("Connection accepted.")
            ' Get the stream
            Dim networkStream As NetworkStream = tcpClient.GetStream()
            ' Read the stream into a byte array
            Dim bytes(tcpClient.ReceiveBufferSize) As Byte
            networkStream.Read(bytes, 0, CInt(tcpClient.ReceiveBufferSize))
            tcpClient.Close()
            tcpListener.Stop()
            Console.WriteLine("exit")
            Console.ReadLine()
        Catch e As Exception
            Console.WriteLine(e.ToString())
            Console.ReadLine()
        End Try
    End Sub
   End Class

Answer 2

That seems a bit low level. Why not expose a net.tcp WCF endpoint that accepts filestream objects?