Suggestion Webservices

hello friends,

I want to load image,.swf file,video(flv,mp4) in android. For this i want to make webservices in vb.net and make Database.

1. so which data-type you suggest开发者_Go百科 for .net for this each entity?
2. at android side, SAX-parser is comfortable?
3. load huge amount of Data so is there any memory problem are raise?
4. precaution to fetch this all entity.

Thanks

nik