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C#實(shí)現(xiàn)UDP通信方式

更新時(shí)間：2025年01月07日 16:47:12 作者：一介學(xué)徒

文章介紹了如何使用C#實(shí)現(xiàn)UDP通信,包括UDP服務(wù)器和客戶(hù)端的實(shí)現(xiàn)步驟和示例代碼,服務(wù)器關(guān)鍵類(lèi)為UdpClient和IPEndPoint,實(shí)例化對(duì)象后可以通過(guò)異步任務(wù)發(fā)送數(shù)據(jù)并接收數(shù)據(jù),客戶(hù)端同樣使用UdpClient和IPEndPoint,連接到遠(yuǎn)程服務(wù)器后開(kāi)新任務(wù)接收數(shù)據(jù)

C#實(shí)現(xiàn)UDP通信

一、UDP服務(wù)器

1、關(guān)鍵類(lèi)： UdpClient、IPEndPoint；
2、實(shí)例化一個(gè)UdpClient對(duì)象；
3、使用IPEndPoint建立與遠(yuǎn)程對(duì)象的連接；
4、開(kāi)一個(gè)異步新任務(wù)發(fā)送數(shù)據(jù)；
5、主進(jìn)程接收數(shù)據(jù)；

示例代碼：

        public static void Main()
        {
            UdpClient client = new UdpClient(8889);
            CancellationTokenSource cts = new CancellationTokenSource();
            IPEndPoint remotePoint = new IPEndPoint(IPAddress.Any, 0);
            Task.Factory.StartNew(() =>
            {
                while (!cts.IsCancellationRequested)
                {
                    string? sendMessage = Console.ReadLine();
                    if (sendMessage != null)
                    {
                        byte[] data = Encoding.Default.GetBytes(sendMessage);
                        client.Send(data, remotePoint);
                    }
                }
            }, cts.Token);
            while (true)
            {
                byte[] recvdata = client.Receive(ref remotePoint);
                if (recvdata != null)
                {
                    string recvMessage = Encoding.UTF8.GetString(recvdata);
                    if (recvMessage == "quit")
                    {
                        cts.Cancel();
                        client.Close();
                        return;
                    }
                    StringBuilder sb = new StringBuilder("客戶(hù)端：");
                    sb.Append(recvMessage);
                    Console.WriteLine(sb);
                }
            }
        }

二、UDP客戶(hù)端

1、關(guān)鍵類(lèi)： UdpClient、IPEndPoint；
2、實(shí)例化一個(gè)UdpClient對(duì)象；
3、使用IPEndPoint建立與遠(yuǎn)程服務(wù)器的連接；
4、開(kāi)新任務(wù)接收數(shù)據(jù)；
5、主進(jìn)程發(fā)送數(shù)據(jù)；

示例代碼：

        public static void Main()
        {
            UdpClient client = new UdpClient(8888);
            IPAddress remoteIp = IPAddress.Parse("127.0.0.1");
            int remotePort = 8889;
            IPEndPoint? remoteEndPoint = new IPEndPoint(remoteIp, remotePort);
            CancellationTokenSource cts = new CancellationTokenSource();

            Task.Factory.StartNew(() =>
            {
                while (!cts.IsCancellationRequested)
                {
                    try
                    {
                        byte[] data = client.Receive(ref remoteEndPoint);
                        if (data != null)
                        {
                            StringBuilder sb = new StringBuilder("服務(wù)器：");
                            sb.Append(Encoding.UTF8.GetString(data));
                            Console.WriteLine(sb);
                        }
                    }
                    catch (Exception ex) 
                    {
                        Console.WriteLine(ex.ToString());
                        break ;
                    }
                }
            }, cts.Token);

            while (true)
            {
                string? sendMessage = Console.ReadLine();
                if (sendMessage != null)
                {
                    byte[] data = Encoding.Default.GetBytes(sendMessage);
                    client.Send(data, remoteEndPoint);
                    if (sendMessage == "quit")
                    {
                        cts.Cancel();
                        client.Close();
                        return;
                    }
                }
            }
        }