C#通讯编程--UDP通讯
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-C#
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 );
}
}
}
}
{
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 );
}
}
}
}
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-C#
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 ();
}
}
}
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 ();
}
}
}
简单的UDP
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-C#
try
{
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); //向此网段发广播包
int UDPListenerPort = 8082;
IPAddress broadcast = IPAddress.Parse("192.168.0.255"); //此处根据IP及子网掩码改为相应的广播IP
string ts = "This is UPD string for sending";
byte[] sendbuf = Encoding.ASCII.GetBytes(ts);
IPEndPoint ep = new IPEndPoint(broadcast, UDPListenerPort);
s.SendTo(sendbuf, ep);
}
catch (Exception e)
{}
{
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); //向此网段发广播包
int UDPListenerPort = 8082;
IPAddress broadcast = IPAddress.Parse("192.168.0.255"); //此处根据IP及子网掩码改为相应的广播IP
string ts = "This is UPD string for sending";
byte[] sendbuf = Encoding.ASCII.GetBytes(ts);
IPEndPoint ep = new IPEndPoint(broadcast, UDPListenerPort);
s.SendTo(sendbuf, ep);
}
catch (Exception e)
{}
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-C#
UdpClient listener;
int UDPListenerPort = 8082;
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, UDPListenerPort);
try
{
while (true)
{
byte[] bytes = listener.Receive(ref groupEP);
string RecIP = groupEP.ToString().Substring(0, groupEP.ToString().IndexOf(":")); //收到发送UPD端的IP
string RecStr = Encoding.ASCII.GetString(bytes, 0, bytes.Length); //收到的UPD字符串
}
}
catch
{}
int UDPListenerPort = 8082;
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, UDPListenerPort);
try
{
while (true)
{
byte[] bytes = listener.Receive(ref groupEP);
string RecIP = groupEP.ToString().Substring(0, groupEP.ToString().IndexOf(":")); //收到发送UPD端的IP
string RecStr = Encoding.ASCII.GetString(bytes, 0, bytes.Length); //收到的UPD字符串
}
}
catch
{}
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