C# 如何修复错误“通常每个套接字地址（协议/网络地址/端口）只允许使用一次”？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/14654998/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How do I fix the error "Only one usage of each socket address (protocol/network address/port) is normally permitted"?
提问by Stephen Foster
I've done a lot of googling but not had much luck with my issues. I am new to network programming and trying to learn, I've attempted to set up a simple server & client that communicate (following an online tutorial located here -> http://tech.pro/tutorial/704/csharp-tutorial-simple-threaded-tcp-server)
我已经做了很多谷歌搜索，但我的问题没有太多运气。我是网络编程的新手并试图学习，我试图建立一个简单的服务器和客户端进行通信（遵循位于此处的在线教程 - > http://tech.pro/tutorial/704/csharp-tutorial-简单线程tcp服务器）
The issue I'm having is that I keep getting the exception "Only one usage of each socket address (protocol/network address/port) is normally permitted" when trying to start the TcpListener on the server.
我遇到的问题是，在尝试在服务器上启动 TcpListener 时，我不断收到异常“通常只允许使用每个套接字地址（协议/网络地址/端口）一次”。
I've tried disabling my firewall, changing the port to be used, moving variables around but to no avail (the client works fine, but it obviously can't find the server because I cannot launch it).
我试过禁用我的防火墙，更改要使用的端口，移动变量但无济于事（客户端工作正常，但显然无法找到服务器，因为我无法启动它）。
I've seen solutions describing the use of Socket.Poll() but since I'm only using the TcpListener object, I have no idea how to make use of the Poll function.
我看过描述使用 Socket.Poll() 的解决方案，但由于我只使用 TcpListener 对象，我不知道如何使用 Poll 函数。
My code:
我的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Net;
using System.Threading;
using System.Text;
namespace ServerTutorial {
class Server {
private readonly Thread m_listenThread;
public Server() {
m_listenThread = new Thread(new ThreadStart(ListenForClients));
m_listenThread.Start();
}
public void ListenForClients() {
var listener = new TcpListener(IPAddress.Any, 3000);
listener.Start();
while (true) {
//Blocks until a client has connected to the server
TcpClient client = listener.AcceptTcpClient();
//Send a message to the client
var encoder = new ASCIIEncoding();
NetworkStream clientStream = client.GetStream();
byte[] buffer = encoder.GetBytes("Hello Client!");
clientStream.Write(buffer, 0, buffer.Length);
clientStream.Flush();
//Create a thread to handle communication with the connected client
var clientThread = new Thread(new ParameterizedThreadStart(HandleClient));
clientThread.Start(client);
}
}
private void HandleClient(object clientObj) { //Param thread start can only accept object types, hence the cast
var client = (TcpClient) clientObj;
NetworkStream clientStream = client.GetStream();
var message = new byte[4096];
while (true) {
int bytesRead = 0;
try {
//Block until a client sends a message
bytesRead = clientStream.Read(message, 0, 4096);
} catch {
//A socket error has occurred
System.Diagnostics.Debug.WriteLine("A socket error has occured");
break;
}
if (bytesRead == 0) {
//The client has disconnected from the server
System.Diagnostics.Debug.WriteLine("A client has disconnected from the server");
client.Close();
break;
}
//Message has been received
var encoder = new ASCIIEncoding();
System.Diagnostics.Debug.WriteLine(encoder.GetString(message, 0, bytesRead));
}
}
}
}
In my main method:
在我的主要方法中：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ServerTutorial {
class Program {
static void Main(string[] args) {
var server = new Server();
server.ListenForClients();
}
}
}
Any help is hugely appreciated!
非常感谢任何帮助！
采纳答案by Ryan Cavanaugh
ListenForClientsis getting invoked twice (on two different threads) - once from the constructor, once from the explicit method call in Main. When two instances of the TcpListenertry to listen on the same port, you get that error.
ListenForClients被调用两次（在两个不同的线程上） - 一次来自构造函数，一次来自Main. 当两个实例TcpListener尝试侦听同一个端口时，您会收到该错误。
回答by mansoor
You are debugging two or more times. so the application may run more at a time. Then only this issue will occur. You should close all debugging applications using task-manager, Then debug again.
您正在调试两次或更多次。所以应用程序可以一次运行更多。那么只会出现这个问题。您应该使用任务管理器关闭所有调试应用程序，然后再次调试。
回答by Amit Bhargava
I faced similar problem on windows server 2012 STD 64 bit , my problem is resolved after updating windows with all available windows updates.
我在 windows server 2012 STD 64 位上遇到了类似的问题，在使用所有可用的 windows 更新更新 windows 后，我的问题得到了解决。
