C# : Transferring files from Client to Server

I think you need to sit down with a pad a pencil and do some 'design'/decision work first

i) You want to backup some files
a) which files - where
b) what is the data/security classification of the files - will this impact how they should be transmitted/stored ?
ii) to a cloud server/service
a) which cloud ?
b) does this cloud offer API's/a SDK ?? what does that give you - test programs for example ?
c) does the cloud services offer ways of receiving/storing data that match what you expect from point (i,b) ??
d) what is your $$ budget for storage ?
iii) you want a gui interface
what do you want the interface to do
a) select files
b) show progress - how ? listbox/??

Often you'll find eg for Amazon, there are heaps of stuff they give you when you sign up as a developer - if you're new to this field, work your way through their examples, even if they have console mode programs, use these and then start thinking about a gui - I rarely start with the gui side when Im looking at talking to a new service - if you're new to programming, there's a lot going on in a gui that may obscure what you need to to do talk to the cloud api

Your choice about 'which cloud' - looking at those points under (ii) may then drive more decisions/options

btw .. client-server .. in your case, the client is likely the program running on your local machine/pc, the server is the 'cloud' server ie the services that allow you to upload, store etc to a cloud service - I thinking looking at 'client-server' programming is a bit premature/wrong in your case


Lastely, I'd point out that this forum is for quick answers - that really means you have to have specific bits of code/questions you need help with, not something broad like this - so you're likely to get broad answers

'g'