//4.开启一个新线程不断接受用户的连接请求

ThreadPool.QueueUserWorkItem(new WaitCallback(skObj =>

{

Socket skConnP = skObj as Socket;

//通过循环不断接受用户的连接请求

while (true)

{

//阻塞线程，等待用户的连接请求

Socket skCommu = skConnP.Accept();

//获取客户端信息

string userinfo = skCommu.RemoteEndPoint.ToString();

txtLog.Invoke(new Action(u =>

{

txtLog.AppendText("客户端【" + u + "】连接成功！" + Environment.NewLine);

}), userinfo);

listboxUserList.Invoke(new Action(u =>

{

listboxUserList.Items.Add(u);

}), userinfo);

if (!_dict.ContainsKey(userinfo))

{

_dict.Add(userinfo, skCommu);

}

//新建一个文本来记录数据

// StreamWriter sw = new StreamWriter("temp.txt",true);

//再启动一个线程来循环接收用户发来的消息

ThreadPool.QueueUserWorkItem(new WaitCallback(skCommuObj =>

{

Socket skCommuP = skCommuObj as Socket;

while (true)

{

byte[] buffers = new byte[1024 * 1024 * 2];

int len = skCommuP.Receive(buffers);

if (len == 0)

{

//当客户端退出以后，在log文本框中显示用户退出的信息

txtLog.Invoke(new Action(x =>

{

txtLog.AppendText("客户端【" + x + "】退出了。");

}), skCommuP.RemoteEndPoint.ToString());

//写入文件

//sw.WriteLine("客户端【" + skCommuP.RemoteEndPoint.ToString() + "】退出了。");

//  sw.Close();

//从ListBox中删除当前用户

listboxUserList.Invoke(new Action(x =>

{

listboxUserList.Items.Remove(x);

}), skCommuP.RemoteEndPoint.ToString());

//删除Dictionary中的内容

_dict.Remove(skCommuP.RemoteEndPoint.ToString());

break;

}

else

{

string userMessage = Encoding.UTF8.GetString(buffers, 0, len);

//把用户发来的消息显示到txtLog上。

txtLog.Invoke(new Action((msg, uinfo) =>

{

txtLog.AppendText("客户端【" + uinfo + "】在"+DateTime.Now.ToString()+"发来消息：" + msg + Environment.NewLine);

}), userMessage, skCommuP.RemoteEndPoint.ToString());

//写入文件

//sw.WriteLine("客户端【" + skCommuP.RemoteEndPoint.ToString() + "】在" + DateTime.Now.ToString() + "发来消息：" + userMessage);

}

}

}), skCommu);

}

}), _skConn);