using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace Server
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){lab_pro.Text = "接收:0/100";  }/// <summary>/// 开启服务/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, EventArgs e){button1.Text = "监听中...";button1.Enabled = false;Socket receiveSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);IPEndPoint hostIpEndPoint = new IPEndPoint(IPAddress.Parse("192.168.1.100"), 121);//设置接收数据缓冲区的大小byte[] b = new byte[4096];receiveSocket.Bind(hostIpEndPoint);//监听receiveSocket.Listen(2);//接受客户端连接Socket hostSocket = receiveSocket.Accept();//如何确定该数组大小MemoryStream fs = new MemoryStream();int length = 0;//每次只能读取小于等于缓冲区的大小while ((length = hostSocket.Receive(b)) > 0){fs.Write(b, 0, length);if (progressBar1.Value <100){progressBar1.Value++;lab_pro.Text = "接收:" + progressBar1.Value + "/100";}}progressBar1.Value = 100;lab_pro.Text = "接收:" + progressBar1.Value + "/100";fs.Flush();Bitmap Img = new Bitmap(fs);Img.Save(@"reveive.jpg", ImageFormat.Png);//关闭写文件流
            fs.Close();//关闭接收数据的Socket
            hostSocket.Shutdown(SocketShutdown.Receive);hostSocket.Close();//关闭发送连接
            receiveSocket.Close();}    }
}

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.Tasks;
using System.Windows.Forms;namespace Client
{public partial class Form1 : Form{public Form1(){InitializeComponent();}static Socket sendsocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);OpenFileDialog openFileDialog1 = new OpenFileDialog();Byte[] imgByte = new byte[1024];/// <summary>/// 打开本地文件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btm_scane_Click(object sender, EventArgs e){this.openFileDialog1.Filter  = "Image Files(*.BMP;*.JPG;*.GIF;*.PNG)|*.BMP;*.JPG;*.GIF;*.PNG" +"|All Files (*.*)|*.*";if (this.openFileDialog1.ShowDialog() == DialogResult.OK){try{string path = this.openFileDialog1.FileName;lab_path.Text = path;FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);imgByte = new Byte[fs.Length];fs.Read(imgByte, 0, imgByte.Length);fs.Close();}catch (Exception){}}}/// <summary>/// 向服务器发送数据/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btn_send_Click(object sender, EventArgs e){//实例化socket        IPEndPoint ipendpiont = new IPEndPoint(IPAddress.Parse("192.168.1.100"), 121);sendsocket.Connect(ipendpiont);MessageBox.Show("服务器IP:"+sendsocket.RemoteEndPoint);sendsocket.Send(imgByte);sendsocket.Shutdown(System.Net.Sockets.SocketShutdown.Send);sendsocket.Close();sendsocket.Dispose();}}
}