求一个Udp例子

[luobing261314]

由于需求要做一个简单网络聊天系统
我对于这方面没有接触过
听所要Udp协议才可以做到
所以请各位朋友帮帮忙.

[tianshangfei]

oo

[dayizhixiaotutu]

网上很多的

[deserveit]

namespace UDPServer
{
class Program
{
static void Main(string[] args)
{
int recv;
byte[] data = new byte[1024];

//构建TCP 服务器

//得到本机IP，设置TCP端口号
IPEndPoint ipep = new IPEndPoint(IPAddress.Any , 8001);
Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram , ProtocolType.Udp);

//绑定网络地址
newsock.Bind(ipep);

Console.WriteLine("This is a Server, host name is {0}",Dns.GetHostName());

//等待客户机连接
Console.WriteLine("Waiting for a client...");

//得到客户机IP
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint Remote = (EndPoint)(sender);
recv = newsock.ReceiveFrom(data, ref Remote);
Console .WriteLine ("Message received from {0}: ", Remote.ToString ());
Console .WriteLine (Encoding .ASCII .GetString (data ,0,recv ));

//客户机连接成功后，发送欢迎信息
string welcome = "Welcome ! ";

//字符串与字节数组相互转换
data = Encoding .ASCII .GetBytes (welcome );

//发送信息
newsock .SendTo (data ,data.Length ,SocketFlags .None ,Remote );
while (true )
{
data =new byte [1024];
//发送接受信息
recv =newsock.ReceiveFrom(data ,ref Remote);
Console .WriteLine (Encoding .ASCII .GetString (data ,0,recv));
newsock .SendTo (data ,recv ,SocketFlags .None ,Remote );
}
}

}
}

[deserveit]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace UDPClient
{
class Program
{
static void Main(string[] args)
{
byte[] data = new byte[1024];
string input ,stringData;

//构建TCP 服务器

Console.WriteLine("This is a Client, host name is {0}", Dns.GetHostName());

//设置服务IP，设置TCP端口号
IPEndPoint ipep = new IPEndPoint(IPAddress .Parse ("127.0.0.1") , 8001);

//定义网络类型，数据连接类型和网络协议UDP
Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

string welcome = "Hello! ";
data = Encoding.ASCII.GetBytes(welcome);
server.SendTo(data, data.Length, SocketFlags.None, ipep);
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint Remote = (EndPoint)sender;

data = new byte[1024];
int recv = server.ReceiveFrom(data, ref Remote);
Console.WriteLine("Message received from {0}: ", Remote.ToString());
Console.WriteLine(Encoding .ASCII .GetString (data,0,recv));
while (true)
{
input = Console .ReadLine ();
if (input =="exit")
break ;
server .SendTo (Encoding .ASCII .GetBytes (input ),Remote );
data = new byte [1024];
recv = server.ReceiveFrom(data, ref Remote);
stringData = Encoding.ASCII.GetString(data, 0, recv);
Console.WriteLine(stringData);
}
Console .WriteLine ("Stopping Client.");
server .Close ();
}

}
}

[jackljane]

udp 是发完就不管了。不管有没有收到. 在某个端口监听就行了。
private IPEndPoint iep;
iep = new IPEndPoint(IPAddress.Parse("192.168.0.1"), 8888);
private void listen()
{
while (true)
{
string text = Encoding.UTF8.GetString(uc.Receive(ref iep));　　//对发送的数据的进行UTF8格式的编码
DataRow dr = dt.Rows.Find(iep.Address);
if (dr != null)
{

Invoke(new SHowText(show), new object[] {dr["NickName"].ToString(),text });
}
else
{
Invoke(new SHowText(show), new object[] { iep.Address.ToString(), text });
}

}

}

[jackljane]

上面是接收部份
这里是发送部份

这里的端口都是 8888 ,从本机192.168.0.1 发给自己. 监听需要在后运行一个线程 .

private UdpClient uc;
uc = new UdpClient(8888);

IPEndPoint ieps = new IPEndPoint(IPAddress.Parse("192.168.0.1"), 8888); 　　　　　　　　　　
string temp = tbMsg.Text;
byte[] b = Encoding.UTF8.GetBytes(temp);　 //对发送的数据的进行UTF8格式的编码　
uc.Send(b, b.Length, ieps);

[jackljane]

上面是接收部份
这里是发送部份

这里的端口都是 8888 ,从本机192.168.0.1 发给自己. 监听需要在后运行一个线程 .

private UdpClient uc;
uc = new UdpClient(8888);

IPEndPoint ieps = new IPEndPoint(IPAddress.Parse("192.168.0.1"), 8888); 　　　　　　　　　　
string temp = tbMsg.Text;
byte[] b = Encoding.UTF8.GetBytes(temp);　 //对发送的数据的进行UTF8格式的编码　
uc.Send(b, b.Length, ieps);