using System;
using System.Collections.Generic;
using System.Net.Sockets;
using System.Net;
using System.Text;

namespace XCGConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint point = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 55555);
            try
            {
                server.Bind(point);
                //指定了請(qǐng)求連接的隊(duì)列大小。
                //如果同時(shí)有多個(gè)連接請(qǐng)求，超出這個(gè)隊(duì)列大小的請(qǐng)求將被拒絕，直到隊(duì)列中的連接被處理完畢?。
                server.Listen(10);
                //監(jiān)聽(tīng)本地端口
                Console.WriteLine("開(kāi)始監(jiān)聽(tīng)本地端口:55555");
                //循環(huán)接收客戶端連接請(qǐng)求
                while (true)
                {
                    //接受客戶端連接請(qǐng)求。
                    Socket socket = server.Accept();
                    List<byte> data = new List<byte>();
                    int byteLen = 1024;//每次讀取的字節(jié)數(shù)
                    var tempBuffs = new byte[byteLen];
                    int n = 0;
                    //接收數(shù)據(jù)，直到?jīng)]有數(shù)據(jù)為止。
                    while ((n = socket.Receive(tempBuffs)) > 0)
                    {
                        //不能直接用data.AddRange(tempBuffs);
                        //因?yàn)槊看窝h(huán)Receive都只會(huì)替換tempBuffs中索引0到n-1的值。
                        //而最后一次循環(huán)接收的數(shù)據(jù)可能不滿byteLen，所以需要遍歷n次。
                        for (int i = 0; i < n; i++)
                        {
                            int k = i;
                            data.Add(tempBuffs[k]);
                        }
                        //接收數(shù)據(jù)，直到?jīng)]有數(shù)據(jù)為止。
                        if (n < byteLen)
                        {
                            break;
                        }
                    }
                    string cmd = Encoding.UTF8.GetString(data.ToArray(), 0, data.Count);
                    Console.WriteLine("收到命令：" + cmd);
                    string result = execCmd(cmd);
                    Console.WriteLine("執(zhí)行結(jié)果：" + result);
                    byte[] bytes = Encoding.UTF8.GetBytes(result);
                    socket.Send(bytes);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                return;
            }
        }

        /// <summary>
        /// 重定向輸入輸出流，并且用cmd執(zhí)行命令
        /// </summary>
        /// <param name="cmd"></param>
        /// <returns></returns>
        private static String execCmd(String cmd)
        {
            System.Diagnostics.Process p = new System.Diagnostics.Process();
            p.StartInfo = new System.Diagnostics.ProcessStartInfo();
            p.StartInfo.FileName = "cmd.exe";
            p.StartInfo.Arguments = "/c " + cmd;
            //隱藏程序外殼
            p.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            //在這里重定向輸出即可，因?yàn)椴皇墙换ナ降模绻枰换ナ降闹苯臃磸梒md即可
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.CreateNoWindow = true;
            p.Start();
            return p.StandardOutput.ReadToEnd();
        }
    }
}

private void btnSendMsg_Click(object sender, EventArgs e)
{
    var cmd = "ipconfig";
    string ipAddressString = "127.0.0.1";
    int port = 55555;
    IPAddress ipAddress = IPAddress.Parse(ipAddressString);
    IPEndPoint endpoint = new IPEndPoint(ipAddress, port);
    var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    socket.Connect(endpoint);
    //發(fā)送數(shù)據(jù)
    var msg = Encoding.UTF8.GetBytes(cmd);
    socket.Send(msg);

    int byteLen = 1024;//每次讀取的字節(jié)數(shù)
    var tempBuffs = new byte[byteLen];
    List<byte> data = new List<byte>();
    if (socket.Connected)
    {
        //接收數(shù)據(jù)
        int n = 0;
        while ((n = socket.Receive(tempBuffs)) > 0)
        {
            for (int i = 0; i < n; i++)
            {
                int k = i;
                data.Add(tempBuffs[k]);
            }
            //接收數(shù)據(jù)，直到?jīng)]有數(shù)據(jù)為止。
            if (n < byteLen)
            {
                break;
            }
        }
    }
    socket.Close();
    //讀取結(jié)束
    var dataArray = data.ToArray();
    //將字節(jié)數(shù)組轉(zhuǎn)換為字符串，此處為UTF8編碼。
    var text = Encoding.UTF8.GetString(dataArray);
    txtMsg.Text += text + "\r\n";
}