// 定义套接字
//private Socket receiveSocket;
//private Socket sendSocket;
public AsyncUdpClient()
{
// 本机节点
localEP = new IPEndPoint(IPAddress.Any, listenPort);
// 远程节点
remoteEP = new IPEndPoint(Dns.GetHostAddresses(Dns.GetHostName())[0], remotePort);
// 实例化
udpReceive = new UdpClient(localEP);
udpSend = new UdpClient();
// 分别实例化udpSendState、udpReceiveState
udpSendState = new UdpState {
ipEndPoint = remoteEP, udpClient = udpSend
};
udpReceiveState = new UdpState {
ipEndPoint = remoteEP, udpClient = udpReceive
};
//receiveSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//receiveSocket.Bind(localEP);
//sendSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//sendSocket.Bind(remoteEP);
}
// 接收回调函数
public void ReceiveCallback(IAsyncResult iar)
{
UdpState udpState = iar.AsyncState as UdpState;
if (iar.IsCompleted)
{
Byte[] receiveBytes = udpState.udpClient.EndReceive(iar, ref udpReceiveState.ipEndPoint);
string receiveString = Encoding.Unicode.GetString(receiveBytes);
Console.WriteLine("Received: {0}", receiveString);
receiveDone.Set();
}
}
// 发送回调函数
public void SendCallback(IAsyncResult iar)
{
UdpState udpState = iar.AsyncState as UdpState;
if (iar.IsCompleted)
{
Console.WriteLine("第{0}个发送完毕！", udpState.counter);
Console.WriteLine("number of bytes sent: {0}", udpState.udpClient.EndSend(iar));
//if (udpState.counter == 10)
//{
// udpState.udpClient.Close();
//}
sendDone.Set();
}
}