c# winform 端口监听和文件的传输

                                                      c# winform 端口监听和文件的传输

不说那么多 直接上代码 代码中有注释

服务器用来接收文件，不停的监听端口，有发送文件就马上开始接收文件
服务端代码：

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.Threading;   
using System.Net.Sockets;   
  
using System.IO;   
  
namespace TestSocketServerHSTF   
{   
    public partial class Form1 : Form   
    {   
        public Form1()   
        {   
            InitializeComponent();   
  
  
            //不显示出dataGridView1的最后一行空白   
            dataGridView1.AllowUserToAddRows = false;   
        }  
 
 
        #region 定义变量  
 
 
        #endregion  
 
 
 
        #region 进入窗体即启动服务   
  
        private void Form1_Load(object sender, EventArgs e)   
        {   
            //开启接收线程   
            Thread TempThread = new Thread(new ThreadStart(this.StartReceive));   
            TempThread.Start();   
        }  
 
          
        #endregion  
 
 
 
        #region 功能函数   
  
        private void StartReceive()   
        {   
            //创建一个网络端点   
            IPEndPoint ipep = new IPEndPoint(IPAddress.Any, int.Parse("2005"));   
  
            //MessageBox.Show(IPAddress.Any);   
  
            //创建一个套接字   
            Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);   
  
            //绑定套接字到端口   
            server.Bind(ipep);   
  
            //开始侦听(并堵塞该线程)   
            server.Listen(10);   
  
            //确认连接   
            Socket client = server.Accept();   
  
            //获得客户端节点对象   
            IPEndPoint clientep = (IPEndPoint)client.RemoteEndPoint;   
               
  
  
            //获得[文件名]   
            string SendFileName = System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client));   
            //MessageBox.Show("文件名" + SendFileName);   
  
            //获得[包的大小]   
            string bagSize = System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client));   
            //MessageBox.Show("包大小" + bagSize);   
  
            //获得[包的总数量]   
            int bagCount = int.Parse(System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client)));   
            //MessageBox.Show("包的总数量" + bagCount);   
  
            //获得[最后一个包的大小]   
            string bagLast = System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client));   
            //MessageBox.Show("最后一个包的大小" + bagLast);   
  
            //创建一个新文件   
            FileStream MyFileStream = new FileStream(SendFileName, FileMode.Create, FileAccess.Write);   
  
            //已发送包的个数   
            int SendedCount = 0;   
  
            while (true)   
            {   
                byte[] data = TransferFiles.ReceiveVarData(client);   
                if (data.Length == 0)   
                {   
                    break;   
                }   
                else  
                {   
                    SendedCount++;   
                    //将接收到的数据包写入到文件流对象   
                    MyFileStream.Write(data, 0, data.Length);   
                    //显示已发送包的个数   
                    //MessageBox.Show("已发送包个数"+SendedCount.ToString());   
                }   
            }   
  
            //关闭文件流   
            MyFileStream.Close();   
            //关闭套接字   
            client.Close();   
  
            //填加到dgv里   
            //文件大小，IP，已发送包的个数，文件名，包的总量，最后一个包的大小   
            this.dataGridView1.Rows.Add(bagSize, clientep.Address, SendedCount, SendFileName, bagCount, bagLast);   
  
            //MessageBox.Show("文件接收完毕!");   
  
        }  
 
 
        #endregion  
 
 
 
        #region   拦截Windows消息,关闭窗体时执行   
        protected override void WndProc(ref   Message m)   
        {   
            const int WM_SYSCOMMAND = 0x0112;   
            const int SC_CLOSE = 0xF060;   
            if (m.Msg == WM_SYSCOMMAND && (int)m.WParam == SC_CLOSE)   
            {//捕捉关闭窗体消息      
                //   User   clicked   close   button      
                //this.WindowState = FormWindowState.Minimized;//把右上角红叉关闭按钮变最小化   
  
                ServiceStop();   
            }   
            base.WndProc(ref   m);   
        }  
        #endregion  
 
 
        #region 停止服务   
  
        //停止服务   
        private void ServiceStop()   
        {   
            try  
            {   
  
            }   
            catch { }   
  
            try  
            {   
  
            }   
            catch { }   
        }  
 
        #endregion   
  
    }   
}  

客户端用来发送文件，选择文件后点发送按钮发送文件
客户端代码：

using System;   
using System.Drawing;   
using System.Collections;   
using System.ComponentModel;   
using System.Windows.Forms;   
using System.Data;   
using System.IO;   
using System.Net;   
using System.Net.Sockets;   
using System.Threading;   
  
namespace 发送端   
{   
    /// <summary>   
    /// Form1 的摘要说明。   
    /// </summary>   
    public class Form1 : System.Windows.Forms.Form   
    {   
        private System.Windows.Forms.GroupBox groupBox1;   
        private System.Windows.Forms.OpenFileDialog openFileDialog1;   
        private System.Windows.Forms.TextBox textBox1;   
        private System.Windows.Forms.Button button1;   
        private System.Windows.Forms.Label label1;   
        private System.Windows.Forms.TextBox textBox2;   
        private System.Windows.Forms.Label label2;   
        private System.Windows.Forms.TextBox textBox3;   
        private System.Windows.Forms.GroupBox groupBox2;   
        private System.Windows.Forms.Label label3;   
        private System.Windows.Forms.TextBox textBox4;   
        private System.Windows.Forms.Label label4;   
        private System.Windows.Forms.TextBox textBox5;   
        private System.Windows.Forms.GroupBox groupBox3;   
        private System.Windows.Forms.GroupBox groupBox4;   
        private System.Windows.Forms.Button button2;   
        private System.Windows.Forms.Label label5;   
        private System.Windows.Forms.TextBox textBox6;   
        private System.Windows.Forms.Label label6;   
        private System.Windows.Forms.Label label7;   
        private System.Windows.Forms.ProgressBar progressBar1;   
        private System.Windows.Forms.TextBox textBox7;   
        private System.Windows.Forms.Label label8;   
        private System.Windows.Forms.Label label9;   
        private System.Windows.Forms.TextBox textBox8;   
        private System.Windows.Forms.Label label10;   
        private System.Windows.Forms.TextBox textBox9;   
        private System.Windows.Forms.Label label11;   
        private System.Windows.Forms.Label label12;   
        private System.Windows.Forms.TextBox textBox10;   
        /// <summary>   
        /// 必需的设计器变量。   
        /// </summary>   
        private System.ComponentModel.Container components = null;   
  
        public Form1()   
        {   
            //   
            // Windows 窗体设计器支持所必需的   
            //   
            InitializeComponent();   
  
            //   
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码   
            //   
        }   
  
        /// <summary>   
        /// 清理所有正在使用的资源。   
        /// </summary>   
        protected override void Dispose( bool disposing )   
        {   
            if( disposing )   
            {   
                if (components != null)    
                {   
                    components.Dispose();   
                }   
            }   
            base.Dispose( disposing );   
        }  
 
        #region Windows 窗体设计器生成的代码   
        /// <summary>   
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改   
        /// 此方法的内容。   
        /// </summary>   
        private void InitializeComponent()   
        {   
            this.groupBox1 = new System.Windows.Forms.GroupBox();   
            this.textBox2 = new System.Windows.Forms.TextBox();   
            this.textBox3 = new System.Windows.Forms.TextBox();   
            this.label2 = new System.Windows.Forms.Label();   
            this.label1 = new System.Windows.Forms.Label();   
            this.button1 = new System.Windows.Forms.Button();   
            this.textBox1 = new System.Windows.Forms.TextBox();   
            this.label6 = new System.Windows.Forms.Label();   
            this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();   
            this.groupBox2 = new System.Windows.Forms.GroupBox();   
            this.textBox6 = new System.Windows.Forms.TextBox();   
            this.textBox5 = new System.Windows.Forms.TextBox();   
            this.label4 = new System.Windows.Forms.Label();   
            this.textBox4 = new System.Windows.Forms.TextBox();   
            this.label3 = new System.Windows.Forms.Label();   
            this.label5 = new System.Windows.Forms.Label();   
            this.label9 = new System.Windows.Forms.Label();   
            this.groupBox3 = new System.Windows.Forms.GroupBox();   
            this.textBox8 = new System.Windows.Forms.TextBox();   
            this.textBox9 = new System.Windows.Forms.TextBox();   
            this.textBox7 = new System.Windows.Forms.TextBox();   
            this.progressBar1 = new System.Windows.Forms.ProgressBar();   
            this.label7 = new System.Windows.Forms.Label();   
            this.label8 = new System.Windows.Forms.Label();   
            this.label10 = new System.Windows.Forms.Label();   
            this.label11 = new System.Windows.Forms.Label();   
            this.label12 = new System.Windows.Forms.Label();   
            this.textBox10 = new System.Windows.Forms.TextBox();   
            this.groupBox4 = new System.Windows.Forms.GroupBox();   
            this.button2 = new System.Windows.Forms.Button();   
            this.groupBox1.SuspendLayout();   
            this.groupBox2.SuspendLayout();   
            this.groupBox3.SuspendLayout();   
            this.groupBox4.SuspendLayout();   
            this.SuspendLayout();   
            //    
            // groupBox1   
            //    
            this.groupBox1.Controls.Add(this.textBox2);   
            this.groupBox1.Controls.Add(this.textBox3);   
            this.groupBox1.Controls.Add(this.label2);   
            this.groupBox1.Controls.Add(this.label1);   
            this.groupBox1.Controls.Add(this.button1);   
            this.groupBox1.Controls.Add(this.textBox1);   
            this.groupBox1.Controls.Add(this.label6);   
            this.groupBox1.Location = new System.Drawing.Point(0, 0);   
            this.groupBox1.Name = "groupBox1";   
            this.groupBox1.Size = new System.Drawing.Size(416, 96);   
            this.groupBox1.TabIndex = 0;   
            this.groupBox1.TabStop = false;   
            this.groupBox1.Text = "文件信息";   
            //    
            // textBox2   
            //    
            this.textBox2.Location = new System.Drawing.Point(80, 40);   
            this.textBox2.Name = "textBox2";   
            this.textBox2.ReadOnly = true;   
            this.textBox2.Size = new System.Drawing.Size(232, 21);   
            this.textBox2.TabIndex = 3;   
            //    
            // textBox3   
            //    
            this.textBox3.Location = new System.Drawing.Point(80, 64);   
            this.textBox3.Name = "textBox3";   
            this.textBox3.ReadOnly = true;   
            this.textBox3.Size = new System.Drawing.Size(136, 21);   
            this.textBox3.TabIndex = 3;   
            //    
            // label2   
            //    
            this.label2.Location = new System.Drawing.Point(8, 72);   
            this.label2.Name = "label2";   
            this.label2.Size = new System.Drawing.Size(100, 16);   
            this.label2.TabIndex = 4;   
            this.label2.Text = "文件大小：";   
            //    
            // label1   
            //    
            this.label1.Location = new System.Drawing.Point(16, 48);   
            this.label1.Name = "label1";   
            this.label1.Size = new System.Drawing.Size(96, 16);   
            this.label1.TabIndex = 2;   
            this.label1.Text = "文件名：";   
            //    
            // button1   
            //    
            this.button1.Location = new System.Drawing.Point(320, 16);   
            this.button1.Name = "button1";   
            this.button1.Size = new System.Drawing.Size(88, 23);   
            this.button1.TabIndex = 1;   
            this.button1.Text = "浏览";   
            this.button1.Click += new System.EventHandler(this.button1_Click);   
            //    
            // textBox1   
            //    
            this.textBox1.Location = new System.Drawing.Point(8, 16);   
            this.textBox1.Name = "textBox1";   
            this.textBox1.ReadOnly = true;   
            this.textBox1.Size = new System.Drawing.Size(304, 21);   
            this.textBox1.TabIndex = 0;   
            //    
            // label6   
            //    
            this.label6.Location = new System.Drawing.Point(224, 72);   
            this.label6.Name = "label6";   
            this.label6.Size = new System.Drawing.Size(96, 16);   
            this.label6.TabIndex = 2;   
            this.label6.Text = "（单位：字节）";   
            //    
            // openFileDialog1   
            //    
            this.openFileDialog1.Filter = "所有文件|*.*";   
            //    
            // groupBox2   
            //    
            this.groupBox2.Controls.Add(this.textBox6);   
            this.groupBox2.Controls.Add(this.textBox5);   
            this.groupBox2.Controls.Add(this.label4);   
            this.groupBox2.Controls.Add(this.textBox4);   
            this.groupBox2.Controls.Add(this.label3);   
            this.groupBox2.Controls.Add(this.label5);   
            this.groupBox2.Controls.Add(this.label9);   
            this.groupBox2.Location = new System.Drawing.Point(0, 96);   
            this.groupBox2.Name = "groupBox2";   
            this.groupBox2.Size = new System.Drawing.Size(416, 72);   
            this.groupBox2.TabIndex = 1;   
            this.groupBox2.TabStop = false;   
            this.groupBox2.Text = "系统设置";   
            //    
            // textBox6   
            //    
            this.textBox6.Location = new System.Drawing.Point(96, 40);   
            this.textBox6.Name = "textBox6";   
            this.textBox6.Size = new System.Drawing.Size(72, 21);   
            this.textBox6.TabIndex = 3;   
            this.textBox6.Text = "50000";   
            //    
            // textBox5   
            //    
            this.textBox5.Location = new System.Drawing.Point(320, 16);   
            this.textBox5.Name = "textBox5";   
            this.textBox5.Size = new System.Drawing.Size(80, 21);   
            this.textBox5.TabIndex = 3;   
            this.textBox5.Text = "2005";   
            //    
            // label4   
            //    
            this.label4.Location = new System.Drawing.Point(256, 24);   
            this.label4.Name = "label4";   
            this.label4.Size = new System.Drawing.Size(100, 16);   
            this.label4.TabIndex = 2;   
            this.label4.Text = "传输端口：";   
            //    
            // textBox4   
            //    
            this.textBox4.Location = new System.Drawing.Point(96, 16);   
            this.textBox4.Name = "textBox4";   
            this.textBox4.ReadOnly = true;   
            this.textBox4.Size = new System.Drawing.Size(144, 21);   
            this.textBox4.TabIndex = 1;   
            //    
            // label3   
            //    
            this.label3.Location = new System.Drawing.Point(16, 24);   
            this.label3.Name = "label3";   
            this.label3.Size = new System.Drawing.Size(100, 16);   
            this.label3.TabIndex = 0;   
            this.label3.Text = "本机IP地址：";   
            //    
            // label5   
            //    
            this.label5.Location = new System.Drawing.Point(24, 48);   
            this.label5.Name = "label5";   
            this.label5.Size = new System.Drawing.Size(88, 16);   
            this.label5.TabIndex = 2;   
            this.label5.Text = "包的大小：";   
            //    
            // label9   
            //    
            this.label9.Location = new System.Drawing.Point(176, 48);   
            this.label9.Name = "label9";   
            this.label9.Size = new System.Drawing.Size(224, 16);   
            this.label9.TabIndex = 2;   
            this.label9.Text = "（范围：10000 - 60000 单位：字节）";   
            //    
            // groupBox3   
            //    
            this.groupBox3.Controls.Add(this.textBox8);   
            this.groupBox3.Controls.Add(this.textBox9);   
            this.groupBox3.Controls.Add(this.textBox7);   
            this.groupBox3.Controls.Add(this.progressBar1);   
            this.groupBox3.Controls.Add(this.label7);   
            this.groupBox3.Controls.Add(this.label8);   
            this.groupBox3.Controls.Add(this.label10);   
            this.groupBox3.Controls.Add(this.label11);   
            this.groupBox3.Controls.Add(this.label12);   
            this.groupBox3.Controls.Add(this.textBox10);   
            this.groupBox3.Location = new System.Drawing.Point(0, 168);   
            this.groupBox3.Name = "groupBox3";   
            this.groupBox3.Size = new System.Drawing.Size(416, 168);   
            this.groupBox3.TabIndex = 2;   
            this.groupBox3.TabStop = false;   
            this.groupBox3.Text = "状态信息";   
            //    
            // textBox8   
            //    
            this.textBox8.Location = new System.Drawing.Point(120, 40);   
            this.textBox8.Name = "textBox8";   
            this.textBox8.ReadOnly = true;   
            this.textBox8.Size = new System.Drawing.Size(160, 21);   
            this.textBox8.TabIndex = 1;   
            //    
            // textBox9   
            //    
            this.textBox9.Location = new System.Drawing.Point(120, 64);   
            this.textBox9.Name = "textBox9";   
            this.textBox9.ReadOnly = true;   
            this.textBox9.Size = new System.Drawing.Size(80, 21);   
            this.textBox9.TabIndex = 1;   
            //    
            // textBox7   
            //    
            this.textBox7.Location = new System.Drawing.Point(120, 16);   
            this.textBox7.Name = "textBox7";   
            this.textBox7.ReadOnly = true;   
            this.textBox7.Size = new System.Drawing.Size(160, 21);   
            this.textBox7.TabIndex = 1;   
            //    
            // progressBar1   
            //    
            this.progressBar1.Location = new System.Drawing.Point(8, 136);   
            this.progressBar1.Name = "progressBar1";   
            this.progressBar1.Size = new System.Drawing.Size(400, 23);   
            this.progressBar1.Step = 1;   
            this.progressBar1.TabIndex = 3;   
            //    
            // label7   
            //    
            this.label7.Location = new System.Drawing.Point(32, 24);   
            this.label7.Name = "label7";   
            this.label7.Size = new System.Drawing.Size(96, 16);   
            this.label7.TabIndex = 2;   
            this.label7.Text = "接收端IP地址：";   
            //    
            // label8   
            //    
            this.label8.Location = new System.Drawing.Point(40, 48);   
            this.label8.Name = "label8";   
            this.label8.Size = new System.Drawing.Size(80, 16);   
            this.label8.TabIndex = 2;   
            this.label8.Text = "包的总数量：";   
            //    
            // label10   
            //    
            this.label10.Location = new System.Drawing.Point(8, 72);   
            this.label10.Name = "label10";   
            this.label10.Size = new System.Drawing.Size(120, 16);   
            this.label10.TabIndex = 2;   
            this.label10.Text = "最后一个包的大小：";   
            //    
            // label11   
            //    
            this.label11.Location = new System.Drawing.Point(200, 72);   
            this.label11.Name = "label11";   
            this.label11.Size = new System.Drawing.Size(96, 16);   
            this.label11.TabIndex = 2;   
            this.label11.Text = "（单位：字节）";   
            //    
            // label12   
            //    
            this.label12.Location = new System.Drawing.Point(16, 96);   
            this.label12.Name = "label12";   
            this.label12.Size = new System.Drawing.Size(104, 16);   
            this.label12.TabIndex = 2;   
            this.label12.Text = "已发送包的数量：";   
            //    
            // textBox10   
            //    
            this.textBox10.Location = new System.Drawing.Point(120, 88);   
            this.textBox10.Name = "textBox10";   
            this.textBox10.ReadOnly = true;   
            this.textBox10.Size = new System.Drawing.Size(80, 21);   
            this.textBox10.TabIndex = 1;   
            //    
            // groupBox4   
            //    
            this.groupBox4.Controls.Add(this.button2);   
            this.groupBox4.Location = new System.Drawing.Point(0, 336);   
            this.groupBox4.Name = "groupBox4";   
            this.groupBox4.Size = new System.Drawing.Size(416, 48);   
            this.groupBox4.TabIndex = 3;   
            this.groupBox4.TabStop = false;   
            this.groupBox4.Text = "系统控制";   
            //    
            // button2   
            //    
            this.button2.Location = new System.Drawing.Point(16, 16);   
            this.button2.Name = "button2";   
            this.button2.Size = new System.Drawing.Size(75, 23);   
            this.button2.TabIndex = 0;   
            this.button2.Text = "开始发送";   
            this.button2.Click += new System.EventHandler(this.button2_Click);   
            //    
            // Form1   
            //    
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);   
            this.ClientSize = new System.Drawing.Size(416, 389);   
            this.Controls.Add(this.groupBox4);   
            this.Controls.Add(this.groupBox3);   
            this.Controls.Add(this.groupBox2);   
            this.Controls.Add(this.groupBox1);   
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;   
            this.MaximizeBox = false;   
            this.Name = "Form1";   
            this.Text = "点对点文件传输软体发送端";   
            this.Load += new System.EventHandler(this.EzoneSend_Load);   
            this.groupBox1.ResumeLayout(false);   
            this.groupBox1.PerformLayout();   
            this.groupBox2.ResumeLayout(false);   
            this.groupBox2.PerformLayout();   
            this.groupBox3.ResumeLayout(false);   
            this.groupBox3.PerformLayout();   
            this.groupBox4.ResumeLayout(false);   
            this.ResumeLayout(false);   
  
        }  
        #endregion   
  
        /// <summary>   
        /// 应用程序的主入口点。   
        /// </summary>   
        [STAThread]   
        static void Main()    
        {   
            Application.Run(new Form1());   
        }   
  
        private void button1_Click(object sender, System.EventArgs e)   
        {   
            //选择要进行传输的文件   
            if(this.openFileDialog1.ShowDialog()==DialogResult.OK)   
            {   
                FileInfo EzoneFile=new FileInfo(this.openFileDialog1.FileName);   
                this.textBox1.Text=EzoneFile.FullName;   
                this.textBox2.Text=EzoneFile.Name;   
                this.textBox3.Text=EzoneFile.Length.ToString();   
                   
            }   
        }   
  
  
        private void StartSend()   
        {              
            //创建一个文件对象   
            FileInfo EzoneFile=new FileInfo(this.textBox1.Text);   
            //打开文件流   
            FileStream EzoneStream=EzoneFile.OpenRead();   
            //包的大小   
            int PacketSize=int.Parse(this.textBox6.Text);   
            //包的数量   
            int PacketCount=(int)(EzoneStream.Length/((long)PacketSize));   
            this.textBox8.Text=PacketCount.ToString();   
            this.progressBar1.Maximum=PacketCount;   
            //最后一个包的大小   
            int LastDataPacket=(int)(EzoneStream.Length-((long)(PacketSize*PacketCount)));   
            this.textBox9.Text=LastDataPacket.ToString();   
               
            ////创建一个网络端点   
            //IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.1.136"), int.Parse(this.textBox5.Text));   
  
            ////MessageBox.Show(IPAddress.Any);   
  
            ////创建一个套接字   
            //Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);   
  
            //MessageBox.Show(server.ToString());   
  
  
  
            //指向远程服务端节点   
            IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.1.136"), int.Parse(this.textBox5.Text));   
            //创建套接字   
            Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);   
            //连接到发送端   
            client.Connect(ipep);   
  
  
  
  
  
            ////绑定套接字到端口   
            //client.Bind(ipep);   
  
            //MessageBox.Show(ipep.ToString());   
  
            ////开始侦听(并堵塞该线程)   
            //server.Listen(10);   
            //确认连接   
            //Socket client = server.Accept();   
  
            //MessageBox.Show(client.ToString());   
  
               
  
               
  
  
  
            //获得客户端节点对象   
            IPEndPoint clientep=(IPEndPoint)client.RemoteEndPoint;   
            //获得客户端的IP地址   
            //this.textBox7.Text=clientep.Address.ToString();   
            //发送[文件名]到客户端   
            CommonModule.EzoneModule.SendVarData(client,System.Text.Encoding.Unicode.GetBytes(EzoneFile.Name));   
            //发送[包的大小]到客户端   
            CommonModule.EzoneModule.SendVarData(client,System.Text.Encoding.Unicode.GetBytes(PacketSize.ToString()));   
            //发送[包的总数量]到客户端   
            CommonModule.EzoneModule.SendVarData(client,System.Text.Encoding.Unicode.GetBytes(PacketCount.ToString()));   
            //发送[最后一个包的大小]到客户端   
            CommonModule.EzoneModule.SendVarData(client,System.Text.Encoding.Unicode.GetBytes(LastDataPacket.ToString()));   
  
            //数据包   
            byte[] data=new byte[PacketSize];   
            //开始循环发送数据包   
            for(int i=0;i<PacketCount;i++)   
            {   
                //从文件流读取数据并填充数据包   
                EzoneStream.Read(data,0,data.Length);   
                //发送数据包   
                CommonModule.EzoneModule.SendVarData(client,data);   
                //显示发送数据包的个数   
                this.textBox10.Text=((int)(i+1)).ToString();   
                //进度条值的显示   
                this.progressBar1.PerformStep();   
            }   
  
            //如果还有多余的数据包,则应该发送完毕!   
            if(LastDataPacket!=0)   
            {   
                data=new byte[LastDataPacket];   
                EzoneStream.Read(data,0,data.Length);   
                CommonModule.EzoneModule.SendVarData(client,data);   
                this.progressBar1.Value=this.progressBar1.Maximum;   
            }   
  
            //关闭套接字   
            client.Close();   
            //server.Close();   
            //关闭文件流   
            EzoneStream.Close();   
            this.button2.Enabled=true;   
            MessageBox.Show("文件传输完毕!");   
        }   
  
  
        private void button2_Click(object sender, System.EventArgs e)   
        {   
            //开启文件传输子线程   
            Thread TempThread=new Thread(new ThreadStart(this.StartSend));   
            TempThread.Start();   
            this.button2.Enabled=false;   
        }   
  
        private void EzoneSend_Load(object sender, System.EventArgs e)   
        {   
            //获得本机的IP地址   
            this.textBox4.Text=Dns.GetHostByName(Dns.GetHostName()).AddressList[0].ToString();   
        }   
    }   
} 

公共类，服务端客户端都需要用到

using System;   
using System.Collections.Generic;   
using System.Text;   
  
using System.Net;   
using System.Net.Sockets;   
using System.Windows.Forms;   
  
namespace TestSocketServerHSTF   
{   
    class TransferFiles   
    {   
        public TransferFiles()   
        {   
            //   
            // TODO: 在此处添加构造函数逻辑   
            //   
        }   
  
  
  
        public static int SendData(Socket s, byte[] data)   
        {   
            int total = 0;   
            int size = data.Length;   
            int dataleft = size;   
            int sent;   
  
            while (total < size)   
            {   
                sent = s.Send(data, total, dataleft, SocketFlags.None);   
                total += sent;   
                dataleft -= sent;   
            }   
  
            return total;   
        }   
  
        public static byte[] ReceiveData(Socket s, int size)   
        {   
            int total = 0;   
            int dataleft = size;   
            byte[] data = new byte[size];   
            int recv;   
            while (total < size)   
            {   
                recv = s.Receive(data, total, dataleft, SocketFlags.None);   
                if (recv == 0)   
                {   
                    data = null;   
                    break;   
                }   
  
                total += recv;   
                dataleft -= recv;   
            }   
            return data;   
        }   
  
        public static int SendVarData(Socket s, byte[] data)   
        {   
            int total = 0;   
            int size = data.Length;   
            int dataleft = size;   
            int sent;   
            byte[] datasize = new byte[4];   
            datasize = BitConverter.GetBytes(size);   
            sent = s.Send(datasize);   
  
            while (total < size)   
            {   
                sent = s.Send(data, total, dataleft, SocketFlags.None);   
                total += sent;   
                dataleft -= sent;   
            }   
  
            return total;   
        }   
  
        public static byte[] ReceiveVarData(Socket s)   
        {   
            int total = 0;   
            int recv;   
            byte[] datasize = new byte[4];   
            recv = s.Receive(datasize, 0, 4, SocketFlags.None);   
            int size = BitConverter.ToInt32(datasize, 0);   
            int dataleft = size;   
            byte[] data = new byte[size];   
            while (total < size)   
            {   
                recv = s.Receive(data, total, dataleft, SocketFlags.None);   
                if (recv == 0)   
                {   
                    data = null;   
                    break;   
                }   
                total += recv;   
                dataleft -= recv;   
            }   
            return data;   
        }   
    }   
}