單擊“發送數據”把數據發送到指定IP地址的指定端口號

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;using System.Net; using System.Net.Sockets; using System.IO; using System.Threading;namespace tcpClient {public partial class Form1 : Form{public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){txtSendMssg.Text = "ceshifasong";Thread thrListener = new Thread(new ThreadStart(Listen));thrListener.Start();}private void Form1_FormClosing(object sender, FormClosingEventArgs e){Environment.Exit(0);}private void btnSend_Click(object sender, EventArgs e){TcpClient tcpClient = new TcpClient();tcpClient.Connect(IPAddress.Parse("127.0.0.1"), 2014);//tcpClient.Connect(IPAddress.Parse("192.168.1.111"), 9300);NetworkStream ntwStream = tcpClient.GetStream();if (ntwStream.CanWrite){Byte[] bytSend = Encoding.UTF8.GetBytes(txtSendMssg.Text);ntwStream.Write(bytSend, 0, bytSend.Length);}else{MessageBox.Show("無法寫入數據流");ntwStream.Close();tcpClient.Close();return;}ntwStream.Close();tcpClient.Close();}private void Listen(){Socket listener = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);listener.Bind(new IPEndPoint(IPAddress.Any, 9300));//不斷監聽端口while (true){listener.Listen(0);Socket socket = listener.Accept();NetworkStream ntwStream = new NetworkStream(socket);StreamReader strmReader = new StreamReader(ntwStream);Invoke(new PrintRecvMssgDelegate(PrintRecvMssg),new object[] { strmReader.ReadToEnd() });socket.Close();}//程序的listener一直不關閉//listener.Close(); }//線程內向文本框txtRecvMssg中添加字符串及委托private delegate void PrintRecvMssgDelegate(string s);private void PrintRecvMssg(string info){txtRecvMssg.Text += string.Format("[{0}]:{1}\r\n",DateTime.Now.ToLongTimeString(), info);}private void button1_Click(object sender, EventArgs e){}} }

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轉載于:https://www.cnblogs.com/zhaixing/p/6222857.html

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