// 发送回调函数
private void SendCallback(IAsyncResult iar)
{
UdpState udpState = iar.AsyncState as UdpState;
//Console.WriteLine("第{0}个请求处理完毕！", udpState.counter);
//Console.WriteLine("number of bytes sent: {0}", udpState.udpClient.EndSend(iar));
udpState.udpClient.EndSend(iar);
sendDone.Set();
}
// 接收回调函数
private void ReceiveCallback(IAsyncResult iar)
{
UdpState udpReceiveState = iar.AsyncState as UdpState;
if (iar.IsCompleted)
{
Byte[] receiveBytes = udpReceiveState.udpClient.EndReceive(iar, ref udpReceiveState.ipEndPoint);
string receiveString = Encoding.ASCII.GetString(receiveBytes);
Console.WriteLine("Received: {0}", receiveString);
//Thread.Sleep(100);
receiveDone.Set();
//SendMsg();
}
}
// 定义套接字
//private Socket receiveSocket;
//private Socket sendSocket;
public AsyncUdpClient()
{
// 本机节点
ipEndPoint = new IPEndPoint(IPAddress.Any, listenPort);
// 远程节点
remoteEP = new IPEndPoint(Dns.GetHostAddresses(Dns.GetHostName())[0], remotePort);
// 实例化
udpReceive = new UdpClient(ipEndPoint);
udpSend = new UdpClient();
// 分别实例化udpSendState、udpReceiveState
udpReceiveState = new UdpState();
udpReceiveState.udpClient = udpReceive;
udpReceiveState.ipEndPoint = ipEndPoint;
udpSendState = new UdpState();
udpSendState.udpClient = udpSend;
udpSendState.ipEndPoint = remoteEP;
}