网络通信协议中的UDP通信是无连接通信，客户端在发送数据前无需与服务器端建立连接，即使服务器端不在线也可以发送，但是不能保证服务器端可以收到数据。本文实例即为基于C#实现的UDP通信。具体功能代码如下：
服务器端代码如下：
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)
{
client = new UdpClient(11000);
receiveData = client.Receive(ref remotePoint);//接收数据
receiveString = Encoding.Default.GetString(receiveData);
Console.WriteLine(receiveString);
client.Close();//关闭连接
}
}
客户端代码如下：
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");
int remotePort = 11000;
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
}
}
程序最终运行效果如下：