C#Socket 案例

服务器端

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;

using System.IO;

namespace wangluoqi

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private void button1_Click(object sender, EventArgs e)

        {

            //点击监听按钮时 创建Socket对像

            Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket对象，如果用UDP协议，则要用SocketTyype.Dgram类型的套接字



            //声明ip地址

            IPAddress ip = IPAddress.Any;



            //创建端口对像

            IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtprot.Text));



            //开始监听

            socketWatch.Bind(point);

            ShowMsg("监听成功");

            //声明一秒内可同时连接的客户端

            socketWatch.Listen(10);





            //创建后台进程用来监听连接

            Thread td = new Thread(listen);

            td.IsBackground = true;

            td.Start(socketWatch);







        }

        Socket socketSend;

        Dictionary<string, Socket> dc = new Dictionary<string, Socket>();

        /// <summary>

        /// 创建通信的客户端

        /// </summary>

        /// <param name="o"></param>

        void listen(object o)

        {

            //把对像转成socket 如果不为socket 返回null

            Socket socketwatch = o as Socket;

            while (true)

            {     //等待客户端连接 创建一个负责通信的Socket

                socketSend = socketwatch.Accept();

                dc.Add(socketSend.RemoteEndPoint.ToString(), socketSend);

                comboBox1.Items.Add(socketSend.RemoteEndPoint.ToString());

                ShowMsg(socketSend.RemoteEndPoint.ToString() + ":连接成功");



                //新建一个进程，以免程序假死

                Thread th = new Thread(Receive);

                th.IsBackground = true;

                th.Start(socketSend);





            }

        }



        /// <summary>

        /// 不停的接收传过来的数据

        /// </summary>

        /// <param name="o"></param>

        void Receive(object o)

        {

            try

            {

                while (true)

                {

                    Socket socketSend = o as Socket;



                    byte[] buffer = new byte[1024 * 1024 * 2];

                    int r = socketSend.Receive(buffer);

                    if (r == 0)

                    {

                        break;

                    }

                    string str = Encoding.UTF8.GetString(buffer, 0, r);

                    ShowMsg(socketSend.RemoteEndPoint + ":" + str);

                }

            }

            catch { }

        }



        private void ShowMsg(string str)

        {

            txtlog.AppendText(str + "\r\n");

        }



        private void Form1_Load(object sender, EventArgs e)

        {

            //取消跨线层访问判断

            Control.CheckForIllegalCrossThreadCalls = false;

        }



        private void button4_Click(object sender, EventArgs e)

        {

            string str = txtsend.Text;

            byte[] buf = Encoding.UTF8.GetBytes(str);

            List<byte> blist = new List<byte>();

            blist.Add(0);

            blist.AddRange(buf);

            //将泛型集合转为数组

            byte[] nbuf = blist.ToArray();

                  

            if (comboBox1.SelectedItem == null)

            {

                comboBox1.SelectedIndex = 0;

            }

            dc[comboBox1.SelectedItem.ToString()].Send(nbuf);



        //  socketSend.Send(buf);

        }



        private void button2_Click(object sender, EventArgs e)

        {

            OpenFileDialog odg = new OpenFileDialog();

            odg.InitialDirectory = @"C:\Users\Administrator\Desktop";

            odg.ShowDialog();



            string filepath = odg.FileName;

            txtfilename.Text = filepath;





        }



        //发送文本

        private void button3_Click(object sender, EventArgs e)

        {

            string stpath = txtfilename.Text;

            if (comboBox1.SelectedItem == null)

            {

                comboBox1.SelectedIndex = 0;

            }

            using(FileStream fsRead=new FileStream(stpath,FileMode.OpenOrCreate,FileAccess.Read))

            {

                byte[] buf = new byte[1024 * 1024 * 5];

                int r = fsRead.Read(buf, 0, buf.Length);

                List<byte> nlist= new List<byte>();

                nlist.Add(1);

                nlist.AddRange(buf);

                //将集合转为数组;

                byte[] nbuf = nlist.ToArray();

                dc[comboBox1.SelectedItem.ToString()].Send(nbuf, 0, r+1, SocketFlags.None);

            }

        }



        //发送窗口抖动

        private void button5_Click(object sender, EventArgs e)

        {

            if (comboBox1.SelectedItem == null)

            {

                comboBox1.SelectedIndex = 0;

            }

            byte[] buf = new byte[1];

            buf[0] = 2;

            dc[comboBox1.SelectedItem.ToString()].Send(buf);

        }

    }

}

客户端

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.IO;

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 clent

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

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

        //连接服务器

        private void button1_Click(object sender, EventArgs e)

        {

            //创建连接用的socket





            //创建连接点

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

            //创建要连接的网络点

            IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtpint.Text));



            //连接

            socketsend.Connect(point);

            ShowMsg("连接成功");



            //创建一个后台线层，用于接收服务器发来的数据

            Thread td = new Thread(jssend);

            td.IsBackground = true;

            td.Start();



        }



        /// <summary>

        /// 接收数据

        /// </summary>

        void jssend()

        {

            try

                {

            while (true)

            {

                

                    byte[] buf = new byte[1024 * 1024 * 2];

                    //实际接收到的字符数

                    int r = socketsend.Receive(buf);

                    if (r == 0)

                    {

                        break;

                    }

                //表示接收到的数据是文本

                    if (buf[0] == 0)

                    {

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

                        txtlog.AppendText(socketsend.RemoteEndPoint + ":" + str + "\r\n");

                    }

                    else if (buf[0] == 1)//表示接收到的数据是文件

                    {

                        SaveFileDialog sdg = new SaveFileDialog();

                        sdg.InitialDirectory = @"C:\Users\Administrator\Desktop";

                        sdg.Title = "选择保存位置";                       

                        sdg.ShowDialog(this);//此处一定要添加this



                        string filename = sdg.FileName;

                        using (FileStream fsw = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite))

                        {

                            fsw.Write(buf, 1, r - 1);

                        }

                        MessageBox.Show("保存成功");



                    }

                    else if (buf[0] == 2)//表示接收到的数据是窗口抖动

                    {

                        int x = this.Location.X;

                        int y = this.Location.Y;

                        for (int i = 0; i < 100; i++)

                        {

                            this.Location = new Point(x - 10, y - 10);

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

                            

                        }

                    }

                   



                   

                }

            }

            catch{}

        }





        void ShowMsg(string str)

        {

            txtlog.AppendText(str + "\r\n");

        }



        private void button2_Click(object sender, EventArgs e)

        {

            byte[] buf = Encoding.UTF8.GetBytes(txtsend.Text);

            socketsend.Send(buf);

        }



        private void Form1_Load(object sender, EventArgs e)

        {

            Control.CheckForIllegalCrossThreadCalls = false;

        }

    }

}

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