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

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        private TcpClient tclient;
        // public Form2 Form2;        
        private Thread f1, f2;
        public Form1()
        {
            InitializeComponent();
            /*f3 = new Thread(new ThreadStart());            
             f4 = new Thread(new ThreadStart());*/
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            button2.Click += new EventHandler(button2_Click);
            f1 = new Thread(new ThreadStart(server));
            f1.Start();
        }

        private void server()
        {
            TcpListener tlisten = new TcpListener(new IPEndPoint(IPAddress.Any, 1000));
            
            tlisten.Start();
            MessageBox.Show("start");
            while (/*f1.IsAlive*/true)
            {
                tclient = tlisten.AcceptTcpClient();
                f2 = new Thread(new ThreadStart(receiving));
                f2.Start();
            }
        }

        private void receiving()
        {
            MessageBox.Show("accept");
            NetworkStream networks = tclient.GetStream();
            try
            {
                Byte[] receviebytes = new byte[1001];
                int i = networks.Read(receviebytes/*设置缓冲去*/ , 0, receviebytes.Length/*从缓冲大小去多少数*/ );
                string a = Encoding.ASCII.GetString(receviebytes/*设置缓冲去*/, 0, i/*从缓冲大小去多少数*/ );
                MessageBox.Show("yes");

                UpdateMessage(a);      
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }
            tclient.Close();
            // listBox1.Tag = it.Address.ToString();/*加括号*/         
        }

        public delegate void UpdateMessageHandle(string message);
        private void UpdateMessage(string message)
        {
            if (this.InvokeRequired)
            {
                this.BeginInvoke(new UpdateMessageHandle(UpdateMessage), new object[] { message });
                return;
            }

            this.textBox2.Text = this.textBox2.Text + message + " \r\n";//换行      
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                // string host = Dns.GetHostName();                
                TcpClient tcent = new TcpClient(Dns.GetHostName(), 1000);
                /* string host = Dns.GetHostName();                
                 IPHostEntry s = Dns.GetHostByName(host);                
                 IPEndPoint it = new IPEndPoint(s.AddressList[0], 80);                
                 tcent.Connect(it);*/
                NetworkStream networks = tcent.GetStream();
                string t = textBox1.Text;
                Byte[] sendbytes = Encoding.ASCII.GetBytes(t);
                networks.Write(sendbytes, 0, sendbytes.Length);
                textBox1.Clear(); 
                tcent.Close();
            }
            //MessageBox.Show(" what");            
            //tclient.Close();            
            catch (Exception g)
            {
                MessageBox.Show(g.ToString());
            }
        }
    }
}