ViewData, ViewBag, TempData in MVC

In MVC there are three ways - ViewData, ViewBag and TempData to pass data from controller to view.

ViewData

•  ViewData is a dictionary object that is derived from ViewDataDictionary class. public 
•  ViewData is used to pass data from controller to corresponding view.
•  Its life lies only during the current request.
•  If redirection occurs then its value becomes null.
•  It’s required typecasting for getting data and check for null values to avoid error.

ViewBag

•  ViewBag is a dynamic property that takes advantage of the new dynamic features in C# 4.0.
•  Basically it is a wrapper around the ViewData and also used to pass data from controller to corresponding view.
• Its life also lies only during the current request.
• If redirection occurs then its value becomes null.

TempData

• TempData is a dictionary object that is derived from TempDataDictionary class and stored in short lives session.
• TempData is used to pass data from current request to subsequent request (means redirecting from one page to another).
• Its life is very short and lies only till the target view is fully loaded.
• It’s required typecasting for getting data and check for null values to avoid error.
• It’s used to store only one time messages like error messages, validation messages.