using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Threading;

using System.Net.Sockets;

using System.Net;

using System.IO;

namespace WindowsFormsApplication2

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        Socket client;

        private void button2_Click(object sender, EventArgs e)

        {

             client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            IPAddress ip = IPAddress.Parse(this.ip.Text);

            IPEndPoint prot = new IPEndPoint(ip, Convert.ToInt32(this.port.Text));

            client.Connect(prot); //服务器端口

            listin("连接成功");

            Thread th = new Thread(sends);

            th.Start();

        }

        public void listin(string msg)

        {

            this.textBox2.AppendText(msg + "\r\n");

        }

        void sends()

        {

            try{

                while (true)

                {

                    Byte[] buf = new Byte[1024 * 1024 * 3];

                    int result = client.Receive(buf);

                    if (result == 0)

                    {

                        break;

                    }

                    if (buf[0] == 0)

                    {

                        //接收消息

                        string str = Encoding.UTF8.GetString(buf, 1, result-1);

                        listin(client.RemoteEndPoint.ToString() + ":" + str);

                    }

                    else if (buf[0] == 1)

                    {

                        SaveFileDialog sd = new SaveFileDialog(); //创建

                        // 保存文件对话框

                        sd.InitialDirectory = @"C:\Documents and Settings\All Users\桌面"; //设置对话框路径

                        sd.Title = "对话框1"; //对话框标题

                        sd.Filter = "所有文件|*.*";

                        sd.ShowDialog();

                        string path = sd.FileName;

                        using (FileStream fsv = new FileStream(path, FileMode.Create, FileAccess.Write))

                        {

                            //byte[] bytes = Encoding.Default.GetBytes(this.textBox1.Text);

                            //string str = Encoding.UTF8.GetString(buf, 1, result - 1);

                            fsv.Write(buf, 1, buf.Length - 1);

                        }

                        MessageBox.Show("保存成功");

                    }

                    else if (buf[0] == 2)

                    {

                        zheng();

                    }

                }

            }

            catch

            {

            }

        }

        void zheng()

        {

            int x = this.Location.X;

            int y = this.Location.Y;

            for (int i = 0; i < 500; i++)

            {

                this.Location = new Point(x - 20, y - 20);

                this.Location = new Point(x , y);

            }

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            Control.CheckForIllegalCrossThreadCalls = false;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            string str = this.textBox1.Text.Trim();

            Byte[] buf = System.Text.Encoding.UTF8.GetBytes(str);

            client.Send(buf);

        }

    }

}