Question

我想使用以下端口从以下IP地址接收数据包。问题出在＆＃34; client.Receive（ref localEp）;＆＃34; 此行代码无法运行且无法调试。

UdpClient client = new UdpClient();

IPEndPoint localEp = new IPEndPoint(IPAddress.Any, 17000);
client.Client.Bind(localEp);

IPAddress multicastaddress = IPAddress.Parse("224.0.0.10");
client.JoinMulticastGroup(multicastaddress);

while (true)
{
     Byte[] data = client.Receive(ref localEp);
     string strData = Encoding.UTF8.GetString(data);
     Console.WriteLine(strData);
}

我也得到了这个例外ScopeId =＆＃39; localEp.Address.ScopeId＆＃39;抛出了类型＆System; System.SNet.Sockets.SocketException＆＃39;在IPEndPoint localEp中。请帮助纠正我的代码

更新解决方案是，在我的机器中安装了HYPER-V虚拟机设置，这限制了此udp数据的接收。我刚刚禁用它并开始接收数据。说实话，我不知道它的行为。

Answer 1

首先尝试msdn方式从localhost接收来自任何源的数据，然后从其他主机名接收数据：

https://msdn.microsoft.com/en-us/library/system.net.sockets.udpclient(v=vs.110).aspx

// This constructor arbitrarily assigns the local port number.
    UdpClient udpClient = new UdpClient(17000);

    udpClient.Connect("127.0.0.1", 17000);

    // Sends a message to the host to which you have connected.
    Byte[] sendBytes = Encoding.ASCII.GetBytes("Is anybody there?");

    udpClient.Send(sendBytes, sendBytes.Length);

    //// Sends a message to a different host using optional hostname and port parameters.
    //UdpClient udpClientB = new UdpClient();
    //udpClientB.Send(sendBytes, sendBytes.Length, "AlternateHostMachineName", 17000);

    //IPEndPoint object will allow us to read datagrams sent from any source.
    IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);

    // Blocks until a message returns on this socket from a remote host.
    Byte[] receiveBytes = udpClient.Receive(ref RemoteIpEndPoint);
    string returnData = Encoding.ASCII.GetString(receiveBytes);

无法调试UDPclient客户端接收

1 个答案: