Question

客户端通过TCP连接成功将字符串数据发送到服务器。当客户端停止或关闭时，服务器代码将在以下代码的string theString = streamReader.ReadLine();行中退出，并显示“未处理异常”错误。

我可以使用哪些更改或方法使服务器代码正常退出连接和程序？

   static void Listeners()
        {

            Socket socketForClient = tcpListener.AcceptSocket();
            if (socketForClient.Connected)
            {
                Console.WriteLine("Client:"+socketForClient.RemoteEndPoint+" now connected to server.");
                NetworkStream networkStream = new NetworkStream(socketForClient);
                System.IO.StreamWriter streamWriter =  new System.IO.StreamWriter(networkStream);
                System.IO.StreamReader streamReader =     new System.IO.StreamReader(networkStream);

                while (true)
                {
                    string theString = streamReader.ReadLine();
                    Console.WriteLine("Message recieved by client:" + theString);
                    break;
                }
                streamReader.Close();
                networkStream.Close();
                streamWriter.Close();

            }
            socketForClient.Close();
            Console.WriteLine("Press any key to exit from server program");
            Console.ReadKey();
        }

Answer 1

赞：

try {
    while (true)
    {
        string theString = streamReader.ReadLine();
        Console.WriteLine("Message recieved by client:" + theString);
    }
} catch (Exception ex) {
    Console.WriteLine("Error: " + ex.Message);
}

就像其他人提到的那样，您应该使用using语句来帮助您处理一次性用品：

    static void Listeners()
    {
        using (Socket socketForClient = tcpListener.AcceptSocket())
        {
            if (socketForClient.Connected)
            {
                Console.WriteLine("Client:" + socketForClient.RemoteEndPoint + " now connected to server.");
                using (NetworkStream networkStream = new NetworkStream(socketForClient))
                using (System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(networkStream))
                using (System.IO.StreamReader streamReader = new System.IO.StreamReader(networkStream))
                {
                    try
                    {
                        while (true)
                        {
                            string theString = streamReader.ReadLine();
                            Console.WriteLine("Message recieved by client:" + theString);
                        }
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("Error: " + ex.Message);
                    }
                }
            }
        }
        Console.WriteLine("Press any key to exit from server program");
        Console.ReadKey();
    }

客户端停止运行时发生异常未处理的错误

1 个答案: