What is ViewData , ViewBag and TempData in MVC

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 ViewData:-

  •    ViewData is a dictionary object that is derived from the ViewDataDictionary class.
  •    ViewData is a property of the ControllerBase class.
  •    Viewdata is used to transfer data from controller to view.
  •     It’s required typecasting for getting data and check for null values to avoid an error.

    the syntax for ViewData is:-

    ViewData["Message"] = "your Message";


  ViewBag:-

  •  ViewBag is a dynamic property that is used to transfer data from controller to view.
  •  ViewBag is a property of the ControllerBase class.
  •  ViewBag doesn’t require typecasting for getting data and check for null values.

     the syntax for ViewBag is:-

    ViewBag.Message= "your Message";


    ViewBag & ViewData Example:

public ActionResult Index()

{

    ViewBag.Message = "Your Messsage";

    return View();

}

 

public ActionResult Index()

{

    ViewData["Message"] = "Your Message";

    return View();

}

 

In View:-

@ViewBag.Message

@ViewData["Message"]

  

  TempData:-

  • TempData is a dictionary object that is derived from the TempDataDictionary class and stored in short lives session and it is string key and object value.
  • TempData is a property of the ControllerBase class.
  •  It is Used to transfer data from one controller to another controller or from one   action to another  action method  
  •  TempData required typecasting for getting data and check for null values to avoid an error.  

      

   public ActionResult Index()

    {

        TempData["Message"] = "Your Message";

        return View();

    }    

 

     In View:-

 @TempData["Message"]

    

     

 

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