CyberDude

I am using the Winsock control with TCP/IP protocol and trying to send 29K file to a client. Not all the file gets there; only 5K. It is a graphics file and when opened, you can see it has become corrupted. I am using what I call the "burst" method of sending. I collect all the binary bits of the graphics file and send them at once. I've had success doing this with files of size 3K. Because of the larger size, do I need to send chunks instead of all at once? Do I need to set up a buffer to receive the data? I thought you can send files of any size with TCP? Any recommendations? Thank you.

dilettante

Yes, you can send large files. I've sent multimegabyte files just fine.

You can't just blast a bunch of bytes at the Winsock control and expect miracles though. About 16K at a blast seems close to optimal, but you have to drive the process by SendComplete events: blast a block, then when that send completes you blast out another.

No point at all in sucking the whole file into memory, read it a chunk at a time. That's why files have the ability to be read other than all at once.

Geeze.