我一直在谷歌上寻找一个严肃的解决方案，但我只得到“注册表解决方案”之类的东西，我认为它们甚至与我的问题无关。

由于某种原因，我得到了这个错误，而我只启动了一次 TcpListner，如果它失败了，我会停止服务器。

这是我的代码:

class Program
    {
        private static string ServerName = "";
        private static string UserName = "";
        private static string Password = "";
        private static string dbConnectionSring = "";
        private static X509Certificate adminCertificate;
        private  static byte[] readBuffer = new byte[4096];
        static void Main(string[] args)
        {
            Console.WriteLine("Please grant SQL Server access to the Admin Server:\n");
            Console.Write("Server Name: ");
            ServerName = Console.ReadLine();
            Console.Write("\nUser Name: ");
            UserName = Console.ReadLine();
            Console.Write("\nPassword: ");
            Password = PasswordMasker.Mask(Password);
            dbConnectionSring = SQLServerAccess.CreateConnection(ServerName, UserName, Password);
            adminCertificate = Certificate.GenerateOrImportCertificate("AdminCert.pfx", "randomPassword");
            try
            {
                Console.WriteLine("Initializing server on the WildCard address on port 443...");
                TcpListener listener = new TcpListener(IPAddress.Any, 443);
                try
                {
                    Console.WriteLine("Starting to listen at {0}: 443...", IPAddress.Any);
                    
                    //the backlog is set to the maximum integer value, but the underlying network stack will reset this value to its internal maximum value
                    listener.Start(int.MaxValue);
                    Console.WriteLine("Listening... Waiting for a client to connect...");
                    int ConnectionCount = 0;

                    while (true)
                    {
                        try
                        {

                            listener.BeginAcceptTcpClient(new AsyncCallback(AcceptCallback), listener);
                            ConnectionCount++;
                            Console.WriteLine(
                                " Accepted connection #" + ConnectionCount.ToString());


                        }
                        catch (SocketException err)
                        {
                            Console.WriteLine("Accept failed: {0}", err.Message);
                        }
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Listening failed to start.");
                    listener.Stop();
                    
                    Console.WriteLine(ex.Message);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Initialiazing server Failed.");
                Console.WriteLine(ex.Message);
            }
        }

最佳答案

1. 打开 CMD 并输入:netstat -a
2. 查看“本地地址”列。
3. 查看端口部分。
4. 如果您程序中的端口已经在另一个程序中处于事件状态(正在使用)，您应该使用另一个端口或终止事件进程以使端口空闲。
5. 我将程序中的端口更改为其他端口。

成功了!

非常感谢:@DavidSchwartz、@Gusman

关于c# - 通常只允许每个套接字地址(协议(protocol)/网络地址/端口)使用一次？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41836209/