C# Socket通讯 Win7系统运行自动断开

Question

服务器端:Java编写.
客户端: C#.情况1： 服务器放在XP系统下运行,客户端放在Win7下运行.并且与服务器端进行通讯,一段时间内客户端Socket连接会自动断开(通讯状态下、非通讯状态下现象相同).另服务器有心跳机制。情况2:  服务器与客户端均放在XP系统下,服务器与客户端进行连接,无论是否进行通讯。均未出现连接中断现象.情况3： 服务器放在Win7系统下,客户端放在XP系统下.服务器与客户端进行连接,无聊是否进行通讯。均未出现连接中断现象.求高手指点原因.   IPVN6已禁用.通讯socketc#服务器xp

Answer 1

 //登录方法
        private void login()
        {
            try
            {
                bw = new BackgroundWorker();
                //支持实时报告进度
                //支持取消
                bw.WorkerReportsProgress = true;
                bw.WorkerSupportsCancellation = true;
                //注册事件
                bw.DoWork += new DoWorkEventHandler(bw_DoWork);
                bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
                bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
                //启动线程
                bw.RunWorkerAsync();
            }
            catch (System.Exception)
            {
                Methods.showAlert(this, "登录时出现异常");
            }
        } #region 线程启动
        //线程启动时调用的方法
        private void bw_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker bw = sender as BackgroundWorker;
            //调用登录平台函数
            if (checkBox1.Checked)
                Socket_link("loginserver", "XXX.XXX.XXX.XXX", Int32.Parse("XX22"), bw, e);
            else
                Socket_link("loginserver", "XXX.XXX.XXX.XXX", Int32.Parse("XX22"), bw, e);
            //Socket_link("loginserver", "XXX.XXX.XXX.XXX", Int32.Parse("XX22"), bw, e);
    
        }
        #endregion
  private void Socket_link(string posid, string ip, int port, BackgroundWorker worker, DoWorkEventArgs e)
        {
            pid = posid;
            //定义byte数组，存放消息
            byte[] message = new byte[1024];
            byte[] rev = new byte[1024];
            try
            {
                if (!sendMessage.Connected)
                {                    //定义目标主机的IP,与端口
                    ipp = new IPEndPoint(IPAddress.Parse(ip), port);
 
                    //创建套接字
                    sendMessage = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);                    //连接目标主机（服务器）
                    sendMessage.Connect(ipp);
                    byte[] re = new byte[1024];                    //发送报文类
                    SendMessage POSsendMessage = new SendMessage();
                    POSsendMessage.setPid(pid);                    //接受报文类
                    ReceiveMessage receiveMessage = new ReceiveMessage();                    //发送报文
                    sendMessage.Send(Encoding.UTF8.GetBytes(pid));                    //接收报文
                    sendMessage.Receive(re);
                    string strMessage = Encoding.UTF8.GetString(re, 0, re.Length);
                    strMessage = strMessage.Replace("\0", "").Trim();
                    if (!strMessage.StartsWith("loginsuccess"))
                    {
                        sendMessage.Close();
                        ReceiveUtil.sendMessage = null;
                        Methods.showInfo(this, "登陆失败");
                        labelMessage = "";
                        this.toolStrip.Text = "";
                        return;
                    }
                    else
                    {
                        string[] str = strMessage.Trim().Split(';');
                        string[] temp = str[0].Trim().Split(',');
                        string MyPort = temp[1].Trim().Substring(temp[1].Trim().IndexOf("=") + 1);
                        string tempHost = str[2].Trim();
                        string hostName = str[2].Trim().Substring(str[2].Trim().IndexOf(":") + 1);
                        string MyIp = str[1].Trim().Substring(str[1].Trim().IndexOf(":") + 1);
                        string myO = " 用户名:" + hostName.Trim().Replace(@"\0", "");
                        string myP =" IP: " + MyIp.Trim() + " 端口号: " + MyPort.Trim();
                        labelMessage = myO + myP;
                        this.toolStrip.BeginInvoke(new System.EventHandler(ChangeLabel_UI), labelMessage);
                    }
                }
                //设置控件
                listenThread.Start();
                this.btnLogin.BeginInvoke(new System.EventHandler(LoginUI), "退出");
                timer2.Start();
                ReceiveUtil.sendMessage = sendMessage;
                Methods.showInfo(this, "登陆成功");
                sendMessage.Send(Encoding.UTF8.GetBytes("refreshusers"));
            }
            catch (Exception ex)
            {
                sendMessage.Close();
                ReceiveUtil.sendMessage = null;
                e.Cancel = true;
                if (ex.ToString().Contains("由于目标机器积极拒绝，无法连接"))
                {
                    Methods.showInfo(this, "服务器连接失败");
                }
                else if (ex.ToString().Contains("由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。"))
                {
                    Methods.showInfo(this, "服务器连接失败");
                }
            }        }