public bool Connect()
{
try
{
int tryMax = 20;
int counter = 0;
while (PortInUse((int)hostPort))
{
if (hostPort > 10000)
{
hostPort = 5000;
}
hostPort += 1;
counter++;
if (counter > tryMax)
{
Console.WriteLine("{0}RFID连接失败，端口占用，自动分配方案失败", readerIP);
return(false);
}
}
if (udpClient == null)
{
udpClient = new UdpClient((int)hostPort);
}
this.udpRemotePoint = new IPEndPoint(IPAddress.Parse(readerIP), (int)readerPort);
WqrfidUdpState udpReceiveState = new WqrfidUdpState();
udpReceiveState.ipEndPoint = this.udpRemotePoint;
udpReceiveState.udpClient = udpClient;
// udpClient.Connect(this.udpRemotePoint);
udpClient.BeginReceive(UdpRecvCallback, udpReceiveState);
return(true);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return(false);
}
}
private void UdpRecvCallback(IAsyncResult iar)
{
WqrfidUdpState udpState = iar.AsyncState as WqrfidUdpState;
if (iar.IsCompleted)
{
Byte[] recBytes = udpState.udpClient.EndReceive(iar, ref udpState.ipEndPoint);
if (recBytes != null && recBytes.Count() > 0)
{
lock (bufLock)
{
this.recBuffer.AddRange(recBytes);
}
//Console.Write("Recv:");
//for(int i=0;i<recBytes.Count();i++)
//{
// Console.Write("{0}", recBytes[i].ToString("X2"));
//}
//Console.WriteLine("");
}
}
udpClient.BeginReceive(UdpRecvCallback, udpState);
}