C# Winform局域网传送文件

//发送文件
private void btn_sendFile_Click(object sender, EventArgs e)
{
//打开文件
OpenFileDialog dlg = new OpenFileDialog();

if (dlg.ShowDialog() == DialogResult.OK)
{
//初始化接受套接字：寻址方案，以字符流方式和Tcp通信
socketSent = new Socket(AddressFamily.InterNetwork,
SocketType.Stream,
ProtocolType.Tcp);

//设置服务器IP地址和端口
ipSent = new IPEndPoint(IPAddress.Parse(ip), 8001);
//与服务器进行连接

ClassSocket socketConnet = new ClassSocket(socketSent, ipSent);
Thread tConnection = new Thread(new ThreadStart(socketConnet.SocketConnect));
tConnection.Start();

Thread.Sleep(100);
//将要发送的文件加上"DAT"标识符

ClassSentFile sentFile = new ClassSentFile(dlg, socketSent);
Thread tSentFile = new Thread(new ThreadStart(sentFile.SentFile));
tSentFile.Start();

}
}

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Windows.Forms;
namespace Message
{
class ClassSentFile
{
private OpenFileDialog dlg;
private Socket socketSent;
public ClassSentFile(OpenFileDialog dlg, Socket socketSent)
{
this.dlg = dlg;
this.socketSent = socketSent;
}
public void SentFile()
{
string msg = "DAT " + dlg.FileName;

//将 "msg" 转化为字节流的形式进行传送
socketSent.Send(Encoding.Default.GetBytes(msg));

//定义一个读文件流
FileStream read = new FileStream(dlg.FileName, FileMode.Open, FileAccess.Read);

//设置缓冲区为1024byte
byte[] buff = new byte[1024];
int len = 0;
while ((len = read.Read(buff, 0, 1024)) != 0)
{
//按实际的字节总量发送信息
socketSent.Send(buff, 0, len, SocketFlags.None);
}

//将要发送信息的最后加上"END"标识符
msg = "END";

//将 "msg" 发送
socketSent.Send(Encoding.Default.GetBytes(msg));

socketSent.Close();
read.Close();
}
}
}