c# udp

1.接收

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
UdpClient client = null;
string receiveString = null;
byte[] receiveData = null;
//实例化一个远程端点，IP和端口可以随意指定，等调用client.Receive(ref remotePoint)时会将该端点改成真正发送端端点
IPEndPoint remotePoint = new IPEndPoint(IPAddress.Any, 0);
while (true)
{
// u3d接收端口
client = new UdpClient(9000);
receiveData = client.Receive(ref remotePoint);//接收数据
receiveString = Encoding.Default.GetString(receiveData);
Console.WriteLine(receiveString);
client.Close();//关闭连接
}
}
}
}

2.发送

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
namespace UdpClientNa
{
class Program
{
static void Main(string[] args)
{
string sendString = null;//要发送的字符串
byte[] sendData = null;//要发送的字节数组
UdpClient client = null;
IPAddress remoteIP = IPAddress.Parse("127.0.0.1"); //假设发送给这个IP
// u3d发送端口 9000是发送端口
int remotePort = 9000;
IPEndPoint remotePoint = new IPEndPoint(remoteIP, remotePort);//实例化一个远程端点
while (true)
{
sendString = Console.ReadLine();
sendData = Encoding.Default.GetBytes(sendString);
client = new UdpClient();
client.Send(sendData, sendData.Length, remotePoint);//将数据发送到远程端点
client.Close();//关闭连接
}
}
}
}

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