Socket文件传输
【实例简介】
传输任意格式文件
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using ponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using .Sockets;
using ;
using System.Threading;
using System.IO;
namespace FileServer
{
public partial class Form2 : Form
{
Socket Listensocket;
Thread listenThread;
//_5_1_a_s_p_x
public Form2()
{
InitializeComponent();
}
//选择文件
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)
{
if (!string.IsNullOrEmpty(tbFileName.Text) && !string.IsNullOrEmpty(tbFileSize.Text))
{
//服务端节点
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(textBox1.Text), Convert.ToInt32(textBox2.Text));
//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
listenThread = new Thread(listenClientConnnect);
listenThread.Start();
btnListen.Enabled = false;
}
else
{
MessageBox.Show("请浏览文件", "提醒信息");
}
}
//监听函数
private void listenClientConnnect()
{
stopListen();//停用
while (true)
{
//建立一个与客户端通信的套接字
Socket CommunicationSocket = Listensocket.Accept();
//显示在listbox里面
IPEndPoint clientIP = (IPEndPoint)CommunicationSocket.RemoteEndPoint;
AddMsg(string.Format("{0} 连接到本服务器 {1}", clientIP.Address, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));
//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();
AddMsg(string.Format("向{0} 发送 文件 已完成 {1}", clientIP, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));
}
}
//关闭
private void Form2_FormClosed(object sender, FormClosedEventArgs e)
{
if (Listensocket != null)
{
Listensocket.Close();
}
}
//停止监听
private void btnStop_Click(object sender, EventArgs e)
{
if (listenThread.IsAlive)
{
listenThread.Abort();
btnListen.Enabled = true;
btnStop.Enabled = false;
if (Listensocket != null)
{
Listensocket.Close();
}
listBox1.Items.Add("服务器监听已经停止...");
}
}
//加载
private void Form2_Load(object sender, EventArgs e)
{
btnStop.Enabled = false;
btnListen.Enabled = true;
}
//停止监听
private void stopListen()
{
if (btnStop.InvokeRequired)
{
Action stopAction = () => { stopListen(); };
btnStop.Invoke(stopAction);
}
else
{
btnStop.Enabled = true;
}
}
//向listBox中增加信息
private void AddMsg(string msgStr)
{
if (listBox1.InvokeRequired)
{
Action myAction = (p) => { AddMsg(p); };
this.listBox1.Invoke(myAction, msgStr);
}
else
{
this.listBox1.Items.Add(msgStr);
}
}
}
}
