Need Asynchronous WCF solution which allows for multiple responses

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Bear with me because we are new to WCF and have been going through
documentation and samples trying to absorb as much as possible in a
short amount of time. Any suggestions would be much appreciated. We
would of course rather start off on the right path instead of learning
later that there's a much better and easier solution, but get stuck
with our original implementation.

We are working on designing a client server solution using WCF where
we will have at most 20 clients calling the server with a requests
using NetTcp. Because of the amount of data that can be returned and
usability we want to make this an asynchronous call as well as allow
the server return chunks of data at a time.

- It looks like the Duplex calls only allow for a single response from
the server, so this option is out.
- We have considered creating an Endpoint on both the server and the
client. When requesting data from the server the client would pass
it's Endpoint information to the server. The server would then create
a channel using the client Endpoint info and send responses to the
client in chunks.
- We have also considered using a pattern similar to reading data from
a file where the client will request chunks of data from the server in
multiple calls until it receives an EOF flag. This would need to be
asynchronous as well. This would keep us from creating an Endpoint on
each client. I'm not sure if this is a benefit, but it's one less
thing to do.
- Finally, what would be the best way to pass back the data. We've
created a simple data container, which looks like a basic dataset and
is decorated to allow serialization by WCF. It seems like it would be
sufficient.

Again, any suggestions to get us on the right path earlier rather than
later would be very much appreciated.

Jayson

.

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