Can anybody explain ViewData vs ViewBeg vs TempData.

Question

Hello every one I have one query what is this ViewData vs ViewBeg vs TempData .

Jignesh Kumar · Answer

Hello Sourabh Please find below article to get detailed explanation : https://www.c-sharpcorner.com/blogs/main-difference-between-viewdata-vs-viewbag-vs-tempdata-in-asp-net-mvc Vedio for in-depth explanation : https://www.youtube.com/watch?v=yq1N7zfZTBo

Onkar Sharma · Answer

In ASP.NET MVC ViewData ViewBag and TempData are used to pass data from controllers to views but they have different uses and behaviors. Here's a breakdown of each: ViewData Type : ViewData is a dictionary of type ViewDataDictionary. Purpose : Used to pass data from a controller to a view. Syntax : Accessed using keys e.g. ViewData[Key]. Lifetime : Only available for the current request. Once the view is rendered ViewData is disposed of. Features : Requires type casting and null checking since it uses a weakly typed dictionary. ViewBag Type : ViewBag is a dynamic property a wrapper around ViewData. Purpose : Similar to ViewData ViewBag passes data from controllers to views. Syntax : Uses dynamic properties e.g. ViewBag.Key. Lifetime : Like ViewData it's available only for the duration of the current request. Features : Easier to use than ViewData because it does not require type casting. However it sacrifices compile-time checking because it's dynamic. TempData Type : TempData is also a dictionary of type TempDataDictionary. Purpose : Used for passing data between controller actions. Typically this is used for redirection scenarios. Syntax : Accessed using keys e.g. TempData[Key]. Lifetime : Its data persists for the duration of an HTTP request and survives one additional redirect. After that it's cleared out. Features : Useful for transferring data between actions where the user is quickly redirected from one action to another. Summary 1. Lifetime : ViewData and ViewBag: Data is available only for the current request. TempData: Data persists after a redirect available for the next request. 2. Type Safety : ViewData: Requires casting not type-safe. ViewBag: Dynamic less type-safe but doesn't need casting. TempData: Similar to ViewData requires casting. 3. Usage : ViewData and ViewBag are suitable for passing data to the view within a single request. TempData is ideal for temporary data storage across HTTP redirects. Choosing between them depends on your specific needs concerning data lifetime and convenience with respect to type safety and ease of use. To know more about: ViewBag ViewData And TempData visit: https://www.c-sharpcorner.com/blogs/difference-between-viewdata-viewbag-and-tempdata1 https://www.c-sharpcorner.com/blogs/viewbag-viewdata-and-tempdata-in-mvc https://www.naukri.com/code360/library/asp-net-mvc-viewbag-viewdata-and-tempdata\ Thanks!!

Jaish Mathews · Answer

Here is a tabular comparison of ViewData  ViewBag  and TempData in ASP.NET MVC: Feature ViewData ViewBag TempData Type Dictionary ( ViewDataDictionary ) Dynamic Dictionary ( TempDataDictionary ) Data Persistence Lives only during the current request Lives only during the current request Survives for one additional request (uses session storage) Data Transfer Controller to View (and vice versa) Controller to View (and vice versa) Controller to View or to another Controller Syntax ViewData[key] = value; ViewBag.key = value; TempData[key] = value; Data Retrieval Requires type casting while retrieving No type casting needed (dynamic property) Requires type casting while retrieving Performance Slightly slower due to type casting Faster than ViewData (no type casting) Similar to ViewData (requires type casting) Common Use Case Pass data from Controller to View Pass data from Controller to View Pass data across requests (redirects) Example Usage ViewData[Message] = Hello; ViewBag.Message = Hello; TempData[Message] = Hello; Lifetime Valid only during the request lifecycle Valid only during the request lifecycle Can persist until read or the next request Advantages - Stronger typing compared to ViewBag (dictionary syntax) - Familiar to developers from non-dynamic languages - Easier to use due to dynamic nature - No type casting needed - Ideal for passing data during redirects - Maintains data for the next request Disadvantages - Requires type casting when retrieving data - Error-prone due to lack of compile-time checks - Less intuitive for intra-request data sharing Summary: ViewData and ViewBag are mainly for transferring data between Controller and View during a single request. TempData is specifically designed for scenarios where you need to pass data between requests such as during a redirect. Use the one most appropriate for your scenario: Use ViewData or ViewBag when you are working within the same request. Use TempData when you need to persist data across requests.

Sangeetha S · Answer

TempData is used to pass data between requests particularly useful for redirect scenarios. ViewData and ViewBag are used for passing data to the view within the same request.