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：
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：
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
代码
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;
}
}
}
