VB.NET中与TCPClient的TCP客户端/服务器通信 [英] TCP Client/Server Communications with TCPClient in VB.NET

问题描述

如何在没有TcpListener的情况下在TCPClient中接收消息?我不希望我的聊天客户端要求端口转发，而且，TcpListener将错误消息弄乱了主机，提示该端口上已经存在一个侦听器.

How do I Receive messages in my TCPClient without a TcpListener? I don''t want my chat client to require port forwarding, Also, the TcpListener messes up the host with a error message saying there is already a listener on that port.
How do I accomplish this?

推荐答案

以下内容在c#中-但它变得非常简单.
C#中的TCP客户端服务器简介 [ ThreadPool [从辅助线程调用UI的另一种方法 [ ^ ].

如果不使用线程，则客户端在轮询服务器时似乎会挂起.另一种选择是使用异步io进行轮询-但这通常被认为更难以正确实现-祝您好运:)

更新
希望本文将指导您创建令人满意的解决方案:
使用异步TCP套接字的聊天应用程序 [

The following is in c# - but it''s about as simple as it gets.
Introduction to TCP client server in C#[^]

Without a TCPListener you have to actively poll the server for data, on its own, the TCPClient does not listen for incomming requests.

Use something like ThreadPool[^] to poll data from the server asynchronously, and remember to synchronize access from the worker thread with the UI thread - Another way to Invoke UI from a Worker Thread[^].

If you don''t use threads your client will appear to hang while polling the server. Another option is to poll using asynch io - but that''s usually considered harder to implement correctly - good luck :)

Update
Hopefully this article will guide you towards creating a satisfying solution:
A Chat Application Using Asynchronous TCP Sockets[^]

Regards
Espen Harlinn

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