UDP在哪里循环监听？

Question

下边的代码，只能接收一次，第二次的就不再接受了，不知道在哪里循环监听！～
        private void InitUdp() {
            ip = new IPEndPoint(IPAddress.Any, port);
            client = new UdpClient(ip);
            RequestState rs = new RequestState();
            rs.ip = ip;
            rs.client = client;
            client.BeginReceive(new AsyncCallback(ReqCallback), rs);
        }        private void ReqCallback(IAsyncResult ar) {
            RequestState rs = (RequestState)ar.AsyncState;
            UdpClient client = rs.client;
            IPEndPoint ip = rs.ip;
            rs.buffer = client.EndReceive(ar, ref ip);
            this.Invoke(new MessageDelegate(Message), rs);
        }        private delegate void MessageDelegate(RequestState rs);
        private void Message(RequestState rs) {
            this.tbContent.Text += Encoding.ASCII.GetString(rs.buffer)+"\n";
        }

Answer 1

while(true)
{
//你的接收代码
最好再加上Thread.Sleep(休眠时间) 防止CPU使用过高
}

Answer 2

while(true)
{
//你的接收代码
最好再加上Thread.Sleep(休眠时间) 防止CPU使用过高
}就是要这样的代码，但是应该加在哪里呢？我试着加在BeginRecive或者EndRecive都不行！前一个报错说连接池啥的不够使，后一个报只能接收一次，望指点

Answer 3

private void InitUdp() {
            ip = new IPEndPoint(IPAddress.Any, port);
            client = new UdpClient(ip);
            RequestState rs = new RequestState();
            rs.ip = ip;
            rs.client = client;
while(true){
            client.BeginReceive(new AsyncCallback(ReqCallback), rs);
           }
}

Answer 4

UDP是非连接的,没有监听的说法.
TCP才需要监听.

Answer 5

楼上的大哥，改完后报
“由于系统缓冲区空间不足或队列已满，不能执行套接字上的操作。”我觉得还是有问题，while(true)分别试着加在BeginRecive或者EndRecive都不行

Answer 6

试试private void InitUdp() {
            
            ip = new IPEndPoint(IPAddress.Any, port);
            client = new UdpClient(ip);
            while(true){
            RequestState rs = new RequestState();
            rs.ip = ip;
            rs.client = client;
            client.BeginReceive(new AsyncCallback(ReqCallback), rs);
            }
        }

Answer 7

to :symbol441
报错
由于系统缓冲区空间不足或队列已满，不能执行套接字上的操作。

Answer 8

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;namespace Chat {
    public partial class ChatRoom : Form {        private int port = 8000;
        private UdpClient client;
        private IPEndPoint ip;
        public ChatRoom() {
            InitializeComponent();
            InitUdp();
        }        #region
        private void ChatRoom_FormClosing(object sender, FormClosingEventArgs e) {
            this.Dispose(true);
        }        #region Send Message
        private void SendMessage(string str,IPEndPoint ip) {
            client = new UdpClient();
            client.Connect(ip);
            byte[] sMsg = Encoding.ASCII.GetBytes(str);
            try {
                client.Send(sMsg, sMsg.Length);
            }
            catch (Exception exp) {
                throw exp;
            }
            finally {
                //this.tbContent.Text += str;
                this.tbMessage.Text = "";
            }
        }
        #endregion        #region Recive
        private void InitUdp() {
            ip = new IPEndPoint(IPAddress.Any, port);
            client = new UdpClient(ip);
            while (true) {
                RequestState rs = new RequestState();
                rs.ip = ip;
                rs.client = client;
                client.BeginReceive(new AsyncCallback(ReqCallback), rs);
            }
        }        private void ReqCallback(IAsyncResult ar) {
            RequestState rs = (RequestState)ar.AsyncState;
            UdpClient client = rs.client;
            IPEndPoint ip = rs.ip;
            rs.buffer = client.EndReceive(ar, ref ip);
            this.Invoke(new MessageDelegate(Message), rs);
        }        private delegate void MessageDelegate(RequestState rs);
        private void Message(RequestState rs) {
            this.tbContent.Text += "From Server:"+Encoding.ASCII.GetString(rs.buffer)+"\n";
        }
        #endregion        private void btnSend_Click(object sender, EventArgs e) {
            ip = new IPEndPoint(IPAddress.Parse(tbIp.Text), 8000);
            if (!string.IsNullOrEmpty(tbMessage.Text.Trim()))
                if (!string.IsNullOrEmpty(tbIp.Text.Trim()))
                    SendMessage(tbMessage.Text, ip);
        }        #endregion        private void btnEsc_Click(object sender, EventArgs e) {
            this.Dispose(true);
        }    }
    public class RequestState {
        public RequestState() { }
        public  UdpClient client;
        public IPEndPoint ip;
        public byte[] buffer;
    }
}
全部代码都在这里了，好心人帮忙看看