UdpClient.Receive troubles

Just playing with udp, was going to make two console apps, one to send a message the other to receive.

The example found under "UdpClient.Receive Method", just copied and pasted into an empty class, always gives me a SocketException: An invalid argument was supplied.

Can someone tell me what I'm missing?

Thanks,
Mike

That example is a bad example. When you declare the UDPClient you need to bind it to the local end point.

Change your

Code:

---

Dim receivingUdpClient As New UdpClient

---

to something like this...

Code:

---

Dim receivingUdpClient As New UdpClient(New IPEndPoint(IPAddress.Parse("127.0.0.1"), 0))

---

HTH

One more thing, the receive method is blocking so you might want to include that in a thread.

Thanks, MagellanTX, that did the trick. I've seen other bad examples from MSDN (specifically with Sockets), but I've been able to figure it out myself. Much appreciated.

FWIW, right now I don't care about the blocking business as it's just a test program. Once I figure out what I want, I'll either put it in a thread, or see if there's an asynchronous method available.

Thanks again,
Mike

MagellanTX: Thanks for this post!

Mike Hildner: Just out of curiosity, how did you finally solve the problem? Asyncronous or threaded?

I never took it very far, so never bothered with programming anything asynchronous. I've worked with asynchronous TCP sockets, though.

I was thinking of using UDP for notification when a 911 call came in in a dispatch center. That way, everyone who is subscribing can get a message. But now I'm thinking of using message queues or something, not really sure of the best way. Haven't gotten to that part of the project yet.