socket+TCP文件传输
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace SocketFileSend
{
public partial class Form1 : Form
{
Socket Listensocket;
public Form1()
{
InitializeComponent();
}
//选取要发送的文件
private void BtnSelectFile_Click(object sender, EventArgs e)
{
if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
{
FileInfo fileinfo = new FileInfo(this.openFileDialog1.FileName);
TBFileName.Text = fileinfo.FullName;
TBFileSize.Text = fileinfo.Length.ToString();
}
}
//开始监听
private void btnListen_Click(object sender, EventArgs e)
{
//服务端节点
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.1.102"), 8000);
//创建套接字
Listensocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//绑定IP地址和端口到套接字
Listensocket.Bind(ipep);
//启动监听
Listensocket.Listen(10);
listBox1.Items.Add("开始监听客户端的连接请求");
//在一个单独的线程中监听客户连接
Thread listenThread = new Thread(listenClientConnnect);
listenThread.Start();
}
private void listenClientConnnect()
{
while (true)
{
//建立一个与客户端通信的套接字
Socket CommunicationSocket = Listensocket.Accept();
//创建一个文件对象
FileInfo fileinfo = new FileInfo(TBFileName.Text);
//打开文件流
FileStream filestream = fileinfo.OpenRead();
//文件分块传输，分块的大小,单位为字节
int PacketSize = 5000;
//分块的数量
int PacketCount = (int)(fileinfo.Length / ((long)PacketSize));
//最后一个分块的大小
int LastPacketSize = (int)(fileinfo.Length - ((long)(PacketSize * PacketCount)));
//发送文件名到接收端,文件名长度最多只允许100个字节
byte[] Fullfilename = new byte[100];
if (System.Text.Encoding.UTF8.GetBytes(fileinfo.Name).Length > 100)
{
MessageBox.Show("文件名太长");
break;
}
else
{
byte[] filename=System.Text.Encoding.UTF8.GetBytes(fileinfo.Name);
for (int i = 0; i < filename.Length; i++)
Fullfilename[i] = filename[i];
CommunicationSocket.Send(Fullfilename);
}
//文件按数据包的形式发送，定义数据包的大小
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
filestream.Read(data, 0, data.Length);
//发送数据包
CommunicationSocket.Send(data, 0, data.Length, SocketFlags.None);
}
//发送最后一个数据包
if (LastPacketSize != 0)
{
data = new byte[LastPacketSize];
filestream.Read(data, 0, data.Length);
//发送数据包
CommunicationSocket.Send(data, 0, data.Length, SocketFlags.None);
}
filestream.Close();
CommunicationSocket.Close();
MessageBox.Show("发送完毕");
}
}
//关闭窗体时发生
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
Listensocket.Close();
}
}
}
以上是发送端代码。下面是接收端代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;
namespace SocketFileReceive
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btnConnect_Click(object sender, EventArgs e)
{
Thread mythread = new Thread(GetData);
mythread.Start();
}
private void GetData()
{
//创建网络端点
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.1.102"), 8000);
//创建套接字
Socket clientsocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//连接远程服务器
try
{
clientsocket.Connect(ipep);
listBox1.Items.Add("连接远程服务器成功");
}
catch
{
listBox1.Items.Add("连接远程服务器失败");
}
//接收文件的名称
string filename = System.Text.Encoding.UTF8.GetString(ReceiveStrToByte(clientsocket)).Split('\0')[0];
//创建一个新文件
FileStream MyFileStream = new FileStream(filename, FileMode.Create, FileAccess.Write);
int PacketSize = 5000;
//定义一个完整数据包缓存
byte[] data = new byte[PacketSize];
while (true)
{
int revcount = clientsocket.Receive(data, 0, PacketSize, SocketFlags.None);
if (revcount == 0)
{
data = null;
break;
}
//处理最后一个数据包
if (revcount != PacketSize)
{
byte[] lastdata = new byte[revcount];
for (int i = 0; i < revcount; i++)
lastdata[i] = data[i];
//将接收到的最后一个数据包写入到文件流对象
MyFileStream.Write(lastdata, 0, lastdata.Length);
lastdata = null;
}
else
{
//将接收到的数据包写入到文件流对象
MyFileStream.Write(data, 0, data.Length);
}
}
//关闭文件流
MyFileStream.Close();
//关闭套接字
clientsocket.Close();
MessageBox.Show("接收完毕");
}
//关闭窗体时发生
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
}
//接收函数，（文件名最多100个字节）
private byte[] ReceiveStrToByte(Socket s)
{
try
{
byte[] dataninfo = new byte[100];
int revByteNum = s.Receive(dataninfo, 0, dataninfo.Length, SocketFlags.None);
byte[] retByte = new byte[revByteNum];
for (int i = 0; i < revByteNum; i++)
retByte[i] = dataninfo[i];
return retByte;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return null;
}
}
}
}
