newbie socket question

[tired_of_spaghetti]

I have a C# client/server network program I've written using
TCPListener and TCPClient classes. The server is reading everything
from the client (small amounts of xml) just fine until I try to send a
large file (100k) back to the client. I'm using stream functions for
both client and server with non-blocking socket functions. When I do a
socket.SendFile("filename") back to the client, the file is getting
cut off - I've set the receive buffer size on the client to well past
100k but it still gets cut off around 25k and the communication
between client and server is unreliable afterwords. My basic question
is what happens if data is somehow left in the pipe ? i.e.. will it be
read by the next socket.Read... Does every Send call require exactly
one and only one Read ? Maybe I'm not giving the client enough time to
read the file but their both on the same machine and I've tried
sleeping for a few seconds in various places w/o success.. Any help
appreciated.

Thanks in advance,
El Squid

 

[Patrice]

See :
http://msdn.microsoft.com/en-us/library/system.net.sockets.socket(VS.80).aspx

Note that the code samples reads data in a buffer until nothing more is
read. i.e. you can't assume you'll get all data with a single call. Instead
you are using a buffer and you'll get a chunk of data into this buffer. You
have to keep reading until all chunks are transmitted...