In Asp.Net MVC there are three ways to pass/store data between the controllers and views.

ViewData: -

•  ViewData is used to pass data from one controller to another view.
• It is available for the current request only.
• Requires typecasting for complex data type and checks for null values to avoid error.
• If redirection occurs, then it becomes value null.

ViewBag: -

• ViewBag is also used to pass data from the one controller to another respective view.
• ViewBag is a dynamic property that takes advantage of the new dynamic features in C# 4.0.
• It is also available for the current request only.
• If redirection occurs, then after value becomes null.
• Doesn’t require typecasting for complex data type.

TempData: -

• TempData is derived from TempDataDictionary class.
• TempData is used to pass data from the current request to the next request.
• It keeps the information for the time of an HTTP Request. This means only from one page to another. It helps to maintained data when we move from one controller to another controller or from one action to another action.
• It requires typecasting for complex data type and checks for null values to avoid error. Generally, it is used to store one-time messages like the error messages and validation messages.