using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace SOCKET網(wǎng)絡(luò)編程
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnWatch_Click(object sender, EventArgs e)
        {
            //創(chuàng)建一個(gè)負(fù)責(zé)監(jiān)聽(tīng)的Socket
            Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //創(chuàng)建IP地址和端口號(hào)對(duì)象
            IPAddress ip = IPAddress.Any;//這句Any是獲取自己當(dāng)前本機(jī)的IP，
            //IPAddress ip=IPAdress.Parse（txtIP.Text); 這句是獲取textbox里面輸入的地址
            IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtPort.Text));//這里是獲取文本框里輸入的端口號(hào)，創(chuàng)建了一個(gè)端口對(duì)象，需要傳入ip跟端口號(hào)
            //讓負(fù)責(zé)監(jiān)聽(tīng)的Socket綁定IP地址跟端口號(hào)
            socketWatch.Bind(point);
            ShowMsg("監(jiān)聽(tīng)成功");
            //設(shè)置監(jiān)聽(tīng)隊(duì)列
            socketWatch.Listen(10);
            Thread th = new Thread(listen);
            th.IsBackground = true;
            th.Start(socketWatch);
            
        }
        void listen(object o)
        {
            Socket socketWatch = o as Socket;//as的用法就是如果可以的話，那就直接轉(zhuǎn)換過(guò)去
            while (true)
            {
                //負(fù)責(zé)監(jiān)聽(tīng)的Socket 來(lái)接收客戶端的連接 創(chuàng)建跟客戶端通信的Socket
                Socket socketSend = socketWatch.Accept();
                //如果接收成功，把發(fā)送端的地址顯示出來(lái)
                ShowMsg(socketSend.RemoteEndPoint.ToString() + "連接成功");
            }
        }

        void ShowMsg(string str)
        {
            txtShow.AppendText(str + "\r\n");
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Control.CheckForIllegalCrossThreadCalls = false;
        }
    }
}