客户端发送：
using ;
using .Sockets ;
using System.IO ;
using System.Text ;
using System.Threading ;
private FileStream SentFile;
Socket socket;
Thread mythread ;
//选择文件
private void button1_Click(object sender, System.EventArgs e)
{
if (openFileDialog1.ShowDialog(this)==DialogResult.OK)
txtFileName.Text = openFileDialog1.FileName;
}
//发送文件大小信息
private void button2_Click(object sender, System.EventArgs e)
{
string ip=this.txtRemoIP.Text;
string port=this.txtRemoport.Text;
IPAddress serverIp=IPAddress.Parse(ip);
int serverPort=Convert.ToInt32(port);
IPEndPoint iep=new IPEndPoint(serverIp,serverPort);
IPHostEntry host = Dns.GetHostByAddress(iep.Address ) ;
string HostName = host.HostName;
socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
socket.Connect(iep);
string filename=this.txtFileName.Text;
SentFile = new FileStream(filename, FileMode.Open, FileAccess.Read,FileShare.Read);
int nPos = filename.LastIndexOf("\\");
if (nPos > -1)
filename = filename.Substring(nPos+1);//查找不含路径的文件名
string fileinfo="\x01\x53"+SentFile.Length.ToString()+"\x03";
byte[] byteData = Encoding.ASCII.GetBytes(fileinfo);
Send(socket,byteData);
}
//发送文件数据
private void button4_Click(object sender, System.EventArgs e)
{
string ip=this.txtRemoIP.Text;
string port=this.txtRemoport.Text;
IPAddress serverIp=IPAddress.Parse(ip);
int serverPort=Convert.ToInt32(port);
IPEndPoint iep=new IPEndPoint(serverIp,serverPort);
IPHostEntry host = Dns.GetHostByAddress(iep.Address ) ;
string HostName = host.HostName;
socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
socket.Connect(iep);
this.label3.Text=DateTime.Now.ToString();
long filesize=SentFile.Length;
byte[] buffer = new byte[filesize];
int len=SentFile.Read(buffer,0,buffer.Length);
Send(socket,buffer);
}
//异步发送
private void Send(Socket handler, byte[] byteData)
{
// byte[] byteData = Encoding.ASCII.GetBytes(data);
handler.BeginSend(byteData, 0, byteData.Length, 0,
new AsyncCallback(SendCallback), handler);
}
private static void SendCallback(IAsyncResult ar)
{
try
{
Socket handler = (Socket) ar.AsyncState;
int bytesSent = handler.EndSend(ar);
handler.Shutdown(SocketShutdown.Both);
handler.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}服务端接收：
public static ManualResetEvent allDone = new ManualResetEvent(false);
private Thread th;
private bool listenerRun = true ;
Socket listener;
private const int MAX_SOCKET=10;
long filesize=0;
int filerby=0;
FileStream fs=new FileStream("data.txt",FileMode.Create);
public static IPAddress GetServerIP()
{
IPHostEntry ieh=Dns.GetHostByName(Dns.GetHostName());
return ieh.AddressList[0];
}
//侦听方法
private void Listen()
{
try
{
int nPort=int.Parse(this.txtLocalPort.Text);
IPAddress ServerIp=GetServerIP();
IPEndPoint iep=new IPEndPoint(ServerIp,nPort);
listener=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
listener.Bind(iep);
listener.Listen(10);
while(listenerRun)
{
allDone.Reset();
listener.BeginAccept(new AsyncCallback(AcceptCallback),listener);
allDone.WaitOne();
}
}
catch (System.Security.SecurityException )
{
MessageBox.Show ("防火墙安全错误！","错误",MessageBoxButtons.OK,MessageBoxIcon.Exclamation);
}
}
//
public void AcceptCallback(IAsyncResult ar)
{
Socket listener = (Socket)ar.AsyncState;
Socket client=listener.EndAccept(ar) ;
allDone.Set();
StateObject state = new StateObject();
state.workSocket = client;
this.statusBar1.Text="已经连接！";
client.BeginReceive( state.buffer,0, StateObject.BufferSize, 0,
new AsyncCallback(readCallback), state);
}
public void readCallback(IAsyncResult ar)
{
StateObject state = (StateObject) ar.AsyncState;
Socket handler = state.workSocket;
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
string strmsg=Encoding.ASCII.GetString(state.buffer,0,bytesRead);
if(strmsg.IndexOf("\x01\x53")>-1)//文件大小信息
{
int s=strmsg.IndexOf("\x01\x53");
int e=strmsg.IndexOf("\x03");
string strsize=strmsg.Substring(s+2,e-s-2);
filesize=long.Parse(strsize);
this.label1.Text="该文件大小:"+strsize;
}
else//文件数据
{
this.label1.Text="正在接收文件....";
if((filerby+bytesRead)>=filesize)
{
//接收到完整的信息
fs.Write(state.buffer,0,bytesRead);
fs.Flush();
fs.Close();
this.label1.Text="接收完毕!"+DateTime.Now.ToString();
}
else
{
fs.Write(state.buffer,0,bytesRead);
filerby+=bytesRead;
handler.BeginReceive(state.buffer,0,StateObject.BufferSize, 0,
new AsyncCallback(readCallback), state);
}
}
}
}
private void btnListen_Click(object sender, System.EventArgs e)
{
th = new Thread (new ThreadStart(Listen));//以Listen过程来初始化线程实例
th.Start();//启动此线程
this.btnListen.Enabled=false;
}
//异步传递的状态对象
public class StateObject
{
public Socket workSocket = null;
public const int BufferSize = 1024;
public byte[] buffer = new byte[BufferSize];
public StringBuilder sb = new StringBuilder();
}
