ViewBag, ViewData and TempData

Question

Could any body explain, when to use

1. TempData
2. ViewBag
3. ViewData

I have a requirement, where I need to set a value in a control

Answer 1

Also the scope is different between viewbag and temptdata. viewbag is based on first view (not shared between action methods) but temptdata can be shared between an action method and just one another.