Javatpoint Logo
Javatpoint Logo

ASP.NET MVC ViewData, ViewBag and TempData

ASP.NET MVC provides three variables to store and passing values from controller to view. Both ViewData and ViewBag are similar except TempData that has additional features.

We will discuss about each of these with example.


ASP.NET MVC ViewData

It is a dictionary of objects and derived from ViewDataDictionary class. We can access value by using string as a key. It is type-safe and requires typecasting for data type. It avoids error and check for null reference at run time. It is accessible only during current request.

Example

We are creating a controller and returning a view to the browser. This controller passes Courses ViewData to the view.

Controller

View

// Index.cshtml

Output:

It produces the following output to the browser.

ASP View bag 1

ASP.NET MVC ViewBag

It is a dynamic property which is similar to ViewData. It was introduced in .NET Framework version 4.0. it is used to send data from controller to the view page. ViewBag can get and set value dynamically that's why it is called dynamic property. It does not require type conversion and convert type dynamically.

Example

Here, in this example, we are implementing ViewBag property. Controller and an Index file is given below.

Controller

View

Output:

The Index file produces the following output to the browser.

ASP View bag 2

ASP.NET MVC TempData

It represents a set of data that persists only from one request to the next. It is derived from TempDataDictionary, we can use its object to pass data as we did in ViewData. The value of TempData persists only from one request to the next. Retention is used to mark key to persist data so that it can retain for the next request.

We can also use TempData to pass data from one action to another action. Let's see an example.

Example

Controller

// TempDataController.cs

View

// Index.cshtml

Output:

This index file produces the following output to the browser.

ASP View bag 3
Next TopicASP.Net Razor




Please Share

facebook twitter google plus pinterest

Learn Latest Tutorials


B.Tech / MCA