c# winform socket网络编程，点对点传输文件，socket文件传输，监听端口

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：
////////////////////////////////////////////////////////////////////////////////
//title: 点对点文件传输程序                                           //
////////////////////////////////////////////////////////////////////////////////

//////////////////////////Begin-发送端//////////////////////////////////
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

////////////////////////////Begin-公共模块//////////////////////////////////////

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;
  }
 }
}