客户端/服务器多线程使用 TCP Listener 和 Streamreader/writer

Question

我被要求用 C# 编写一个客户端/服务器应用程序，并且已经完成了一半的代码来开始。

它使用ThreadPool和TcpListener与StreamReader和StreamWriter类进行数据传输。客户端有一个工作目录，它是固定的。服务器也有一个，但可以更改。

基本上，您使用 switch 语句在客户端输入一个选项，然后服务器处理该选项并将其发送回客户端。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.IO;
using System.Security.Cryptography;

namespace Client
{
/// <summary>
/// Remote File Service client
/// </summary>
class Client
{
    /// <summary>
    /// Static entry point to client code
    /// </summary>
    /// <param name="args">unused</param>
    static void Main(string[] args)
    {
        string dir = @"c:\st12_13d1_files";

        try
        {
            Directory.SetCurrentDirectory(dir);
        }
        catch (DirectoryNotFoundException e)
        {
            Console.WriteLine("The specified directory does not exist. {0}", e);
        }

        try
        {
            using (TcpClient client = new TcpClient("localhost", 50012))
            using (NetworkStream stream = client.GetStream())
            using (StreamReader reader = new StreamReader(stream))
            using (StreamWriter writer = new StreamWriter(stream))
            {
                writer.AutoFlush = true;
                string option;

                do
                {
                    Console.WriteLine("-Menu-\n");

                    Console.WriteLine("1-Print out file names-\n");
                    Console.WriteLine("2-Current Working Directory-\n");
                    Console.WriteLine("3-Files Present on the Server-\n");
                    Console.WriteLine("4- List of Subdirectory Names-\n");
                    Console.WriteLine("5- Change Server Directory Location-\n");
                    Console.WriteLine("6-Copy the contents of a file specified-\n");
                    Console.WriteLine("7-Close-\n");

                    Console.WriteLine("Please enter your choice: ");

                    option = Console.ReadLine();

                    switch (option)
                    {
                        case "1":
                        case "one":

                        Console.WriteLine("You have selected Print out file names: ");

                        break;
                    } 

using System;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Text;
using System.Threading;
using System.Security.Cryptography;

namespace Server
{
/// <summary>
/// Remote File Service main functionality
/// </summary>
public class ServerMainline
{
    public ServerMainline()
    {
        /*
        * *** TO DO - your code goes here ***
        * record initial current working directory value in a global variable
        */

        string serv = (@"..\..");        

        try
        {
            //Set the current directory.
            Directory.SetCurrentDirectory(serv);
        }
        catch (DirectoryNotFoundException e)
        {
            Console.WriteLine("The specified directory does not exist. {0}", e);
        }

        TcpListener server = null;
        try
        {
            ThreadPool.SetMaxThreads(50, 50);

            server = new TcpListener(IPAddress.Any, 50012);
            server.Start();

            while (true)
            {

                Console.WriteLine("Waiting for a new Client...");
                TcpClient client = server.AcceptTcpClient();

                ThreadPool.QueueUserWorkItem(serviceClient, client);
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("Server mainline: SocketException: {0}", e);
        }
        finally
        {
            server.Stop();
            server.Server.Close();
        }
    }

    /// <summary>
    /// method to run to handle each client on separate thread
    /// </summary>
    void serviceClient(object clientObject)
    {
        Thread currentThread = Thread.CurrentThread;
        int threadID = currentThread.GetHashCode();    

        try
        {
            using (TcpClient client = (TcpClient)clientObject)
            using (NetworkStream stream = client.GetStream())
            using (StreamReader reader = new StreamReader(stream))
            using (StreamWriter writer = new StreamWriter(stream))
            {
                writer.AutoFlush = true;
                Console.WriteLine("Connected with a client, threadID: {0}", threadID);

                string option = reader.ReadLine();

                while (option != "7")

                switch (option)
                {
                 case "1":
                 case "one":

                 string[] myfiles = Directory.GetFiles(@"c:\st12_13d1_files");
                 Console.WriteLine("File Names {0}",Directory.GetFiles
                 (@"c:\st12_13d1_files"));
                        foreach (string file in myfiles)
                        {
                          //Console.WriteLine(file);
                          Console.WriteLine(Path.GetFileName(file));
                          writer.WriteLine(myfiles);
                        }

                        break;

                       }

Answer 1

恕我直言，我认为让其他人为你完成家庭作业是不合适的。

作为一名学生，您的工作应该是研究（网络上有任意数量的 TCP 套接字演示和教程）并尝试多种解决方案，然后再向他人寻求帮助。

软件开发既是一门艺术，也是一门科学，它要求您花时间练习自己的艺术。你不能通过阅读书籍和让其他人为你工作来学习成为一名优秀的程序员。

投票结束。

更新：不想成为一个完全的脾气暴躁的人，这里有一些教程的链接，它们应该可以帮助您真正掌握异步 TCP/socket 编程：

• Learn C# Socket Programming
• What is a good tutorial/howto on .net / c# socket programming