[UWP] Datagramsocket automatic stop receive message.

Question

First Datagramsocket can't receive any message from UDP

my Code like this

 udpSocket.MessageReceived += UdpSocket_MessageReceived;

            Windows.Networking.HostName hostName = null;
            IReadOnlyList<Windows.Networking.HostName> networkinfo = Windows.Networking.Connectivity.NetworkInformation.GetHostNames();
            foreach (Windows.Networking.HostName h in networkinfo)
            {
                if (h.IPInformation != null)
                {
                    Windows.Networking.Connectivity.IPInformation ipinfo = h.IPInformation;
                    if (h.RawName == IPAddr)
                    {
                        hostName = h;
                        break;
                    }
                }
            }
            if (hostName != null)
                await udpSocket.BindEndpointAsync(hostName, Port);
            else
                await udpSocket.BindServiceNameAsync(Port);

after 2 days debug

i add some code like this

           

   outstm = await udpSocket.GetOutputStreamAsync(new Windows.Networking.HostName("255.255.255.255"), "49002");
    Windows.Storage.Streams.DataWriter dw = new Windows.Storage.Streams.DataWriter(outstm);
     dw.WriteString("Start");
    await dw.StoreAsync();

then UdpSocket_MessageReceived Method start working

but about when i received about 90 messages 

output windows display

thread exit and not any messages receive...

if i keep sending messages it may received about 1000 messages and then stop receive.

Answer 1

Hello Refire,

>>thread exit and not any messages receive...

>>if i keep sending messages it may received about 1000 messages and then stop receive.

There could be number of reasons for this and I can not just find root cause regarding this by just looking at the code above but There is official sample DatagramSocket here which you could look at.

This sample shows you how to a use datagram (UDP) socket to send and receive data using the DatagramSocket and related classes in the Windows.Networking.Sockets namespace in your Universal Windows Platform (UWP) app.

The client component of the sample creates a UDP socket, uses the socket to send and receive data, and closes the socket. The server component of the sample creates a UDP socket to listen for incoming network packets, receives incoming UDP packets from the client, sends data to the client, and closes the socket.

With Regards,

Krunal Parekh

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Answer 2

Finally, I change my code to received 3 Message per second. It works, but other UDP packets just drop and lost. 

I think the there is some different between DataramSocket and UDPClient.

By the way thanks for anyway.