private void button1_Click(object sender, EventArgs e)
{try{string s_ipaddress0 = textBox1.Text;string s_ipaddress1 = textBox2.Text;string s_ipaddress2 = textBox3.Text;string s_ipaddress3 = textBox4.Text;string s_port = textBox5.Text;//限定port的合法性bool isPort;int port;isPort = Int32.TryParse(s_port, out port);if (!(isPort && port >= 0 && port <= 65536)){OutToClient("Port is Invalid!");return;}//限定ip地址的合法性string host = s_ipaddress0 + "." + s_ipaddress1 + "." + s_ipaddress2 + "." + s_ipaddress3;if (!IsIpAdress(host)){OutToClient("IpAdress is invaild!");return;}IPAddress ip = IPAddress.Parse(host);IPEndPoint ipe = new IPEndPoint(ip, port); //Ip端口绑定 如192.168.1.48:80//发送框不能为空, 不然会导致GetBytes出错if (textBox6.Text == ""){OutToClient("Send Text is empty!");return;}OutToClient("Conneting...");int timeout = 1000;//tcpClient连接到指定端口，并处理超时TcpClient NetworkClient = TimeOutSocket.Connect(ipe, timeout);NetworkStream ntwStream = NetworkClient.GetStream();if (!ntwStream.CanWrite){OutToClient("Data can not be write!");return;}//向绑定地址端口发送数据OutToClient("Client send:" + textBox6.Text);string sendStr = textBox6.Text;byte[] by_send = Encoding.ASCII.GetBytes(sendStr);ntwStream.Write(by_send, 0, by_send.Length);//等待服务器端返回数据string recvStr = "";byte[] recvBytes = new byte[4096];int bytes = ntwStream.Read(recvBytes, 0, recvBytes.Length);//将接收到数据转发输出到Client编辑框recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);OutToClient(recvStr);//关闭连接, 一次发送完成
        ntwStream.Close();                                              NetworkClient.Close();OutToClient("Conneting Close!\r\n");}catch (ArgumentNullException ii){OutToClient("ArgumentNullException: "+ ii);}catch (SocketException ii){OutToClient("Socket failed! ");}catch (Exception ii){OutToClient("Conneting faild!" + ii);}
}

//新建线程 开始监听
private void button1_Click(object sender, EventArgs e)
{try{isConnectExit = false;button1.Enabled = false;button2.Enabled = true;Thread Listen_thread = new Thread(ListenClientConnect);Listen_thread.IsBackground = true;Listen_thread.Start();}catch (Exception ii){OutToServer("Connet faild!" + ii);}
}

//监听线程 主要处理数据接收发送
private void ListenClientConnect(object obj)
{string s_ipaddress0 = textBox1.Text;string s_ipaddress1 = textBox2.Text;string s_ipaddress2 = textBox3.Text;string s_ipaddress3 = textBox4.Text;string s_port = textBox5.Text;//限定port的合法性bool isPort;int port;isPort = Int32.TryParse(s_port, out port);if (!(isPort && port >= 0 && port <= 65536)){OutToServer("Port is Invalid!");return;}//限定ip地址的合法性string host = s_ipaddress0 + "." + s_ipaddress1 + "." + s_ipaddress2 + "." + s_ipaddress3;if (!IsIpAdress(host)){OutToServer("IpAdress is invaild!");return;}IPAddress ip = IPAddress.Parse(host);IPEndPoint ipe = new IPEndPoint(ip, port);//新建socket通讯 绑定指定IP+Port 并监听server_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);server_socket.Bind(ipe);server_socket.Listen(10);OutToServer("wait for connect...");while (isConnectExit == false){Socket CurrentSocket;try{//等待连接 完成三次握手CurrentSocket = server_socket.Accept();if(isConnectExit == true){CurrentSocket.Close();                     // 关闭Socket
                server_socket.Close();break;}OutToServer("Get a Connect!");ServerProcess(CurrentSocket);}catch{OutToServer("Connet exti!");}}
}

//断开连接
private void button2_Click(object sender, EventArgs e)
{isConnectExit = true;button2.Enabled = false;button1.Enabled = true;if (server_socket != null){server_socket.Close();}
}