MVC Video :- Difference between viewdata,viewbag,tempdata and session.(MVC Interview questions)
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- Опубліковано 18 січ 2013
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In this MVC ( Model view controller) video we will try to understand what is the difference between viewdata,viewbag,tempdata and session.This is an interesting MVC interview question and below is a textual answer for the same.
Temp data: - Helps to maintain data when you move from one controller to other controller or from one action to other action. In other words when you redirect, "tempdata" helps to maintain data between those redirects. It internally uses session variables.
View data: - Helps to maintain data when you move from controller to view.
View Bag: - It's a dynamic wrapper around view data. When you use "Viewbag" type casting is not required.
Want to Learn MVC 5 in 2 days start from the below video :-
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The following syllabus has been covered in Learn MVC 5 in 2 days
Learn MVC 5 in 2 days
Lab 1 : - Simple Hello world(20 Minutes)
Lab 2 : - Explain MVC Routing(10 Minutes)?
Lab 3 : - Explain ViewData, ViewBag, TempData & Session Variables?(20 Minutes)
Lab 4 :- Explain Model and Strongly typed views (20 minutes)?
Lab 5 : - Explain Model Binders(10 minutes)?
Lab 6 :- Why MVC and MVC vs Webforms ? (30 minutes)
Lab 7 :- Explain TempData , Peek and Keep ? (10 Minutes)
Lab 8 : - Explain Data Annotations and HTML Helpers classes?(31 Minutes)
Lab 9 : - What is the need of ViewModel in MVC? (10 Minutes)
Lab 10 : - How can we use Entity Framework in MVC?(20 minutes)
Lab 11 : - How to implement viewmodel, partial view and webgrid?(45 minutes)
Lab 12 : - What is the difference between ActionResult and ViewResult in MVC?(10 minutes)
Lab 13 :- How to implement Ajax using Json and Jquery in MVC ? (60 Minutes)
Lab 14 : - What is the use of Async Controllers in MVC?(20 minutes)
Lab 15 :- How to deploy MVC Application on IIS ? (10 minutes)
Lab 16 :- How can we do Windows and Forms Authentication in MVC? (50 Minutes)
Lab 17 : - How can we use MVC areas for better modular development ? (10 Minutes)
Lab 18 :- How to implement MVC with Angular ? (60 minutes) ?
Lab 19 :- Can we Overload MVC Action methods ? (10 Minutes)
Lab 20 :- How to improve Reusability using Angular ? (20 Minutes) ?
Lab 21 :- What is the need of WebAPI in MVC ? (30 Minutes)
Lab 22 : - How to do exception handling in MVC? (30 Minutes)
Lab 23 :- How to do update and delete using MVC , WebAPI , EF and Angular? (30 Minutes)
Lab 24 : - How to use MVC Webgrid?(30 minutes)
Lab 25 :- How to implement Validation using Angular and MVC (30 minutes)?
Lab 26 :- What is SPA (Single page application)?
Lab 27 :- How to Organize MVC project and Understanding CORS issue ? (42 minutes)
Lab 28 :- Explain the importance of DisplayModes ? (10 minutes)
Lab 29 :- How to do unit testing with MVC projects (30 minutes)?
Lab 30 :- How to implement SPA using Angular Routing ?
Lab 31 :- How to create decoupled systems using MVC DI ?
Lab 32 :- How can we have multiple submit buttons in ASP.NET MVC ?
Lab 33 : - What is the importance of AntiForgery in MVC?
Lab 34 :- What is the importance of ValidateInput and AllowHTML in MVC?
Lab 35:- Bundling and Minification(15 minutes)
Lab 36 :- Layout pages in Razor
Lab 37: - What are ActionFilters in MVC?
Lab 38: - What is WebAPI (Theory)?
Lab 39: - How can we create and consume WEB API (Practical)?
Lab 40 :- MVC 6/ASP.NET Core Training-Part 1 (2 Hours).
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Thanks , Awesome, Short, Simple and helps to understand exactly what is needed.
The session is very descriptive and informative to set the basics of MVC.
Thanks...Keep posting the Training :-)
Excellent video. Thank you very much. I will eventually watch all of your videos.
you didn't test the same name in the viewbag controllers communication example, at minute eleven, you put ViewBag.CurrentDateTime while actually it was named ViewBag.CurrentDateANDTime.
Anyway, thanks for the video, the point was explained successfully
enjoyed alot with your videos keep good works on thanks
very simple and elegant lesson
Good video and good explanation regardless the small mistakes.
Example is incorrect though concept is right.
CurrentDateAndTime and CurrentDateTime are different at 12:20
Very useful information. Thanks!
Very good video, thank you for posting.
nice efforts for beginners and all. Keep it up.
Thanks Brother! It was very helpful.
Great Job. Thanks for the video
Sorry it was my mistake to type the wrong property name.
11 years old video waw .. still knowledgeable
Nice & useful Tutorial
Thank you for a brilliant video..
Very nice tutorial .... thanks Sir
Awesome explanation....
Love this video.
Thanks very much..very helpful
Could anyone send the link of the next lesson ? i couldn't find it.
Great Lesson BTW!
Very nice video thank you sir :)
hi sir, i used temp data in view and also in action method ...then also data is transferring from action method to view.....
Excellent video sir. Thank you very much. how to get MVC Asp.Net Q & A Series.
Great!
but your two viewBag variable is not the same...one is CurrentDateAndTime one is CurrentDateTime
Exactly! Same doubt here.
Nice video
wrong statement on TempData usage. TempData can be used from controller to view as well. The TempData will be reset to null, only after it was read or used. But we can keep the data's in TempData after read by calling TempData.Keep() function. The Keep() should be called immediately after TempData object used.
+Prabhu Raja Exactly i was thinking the same.. but every where i read this that tempdata for controller to controller ... ? is it true for mvc 3? or in mvc 4 we can use controller to view (one cycle)
I have worked on MVC 5 project and in that i have used TempData to pass the info from Controller to View.
msdn.microsoft.com/en-us/library/system.web.mvc.tempdatadictionary(v=vs.118).aspx
You can use a TempDataDictionary object to pass data in the same way that you use a ViewDataDictionary object. However, the data in a TempDataDictionary object persists only from one request to the next, unless you mark one or more keys for retention by using the Keep method. If a key is marked for retention, the key is retained for the next request.
A typical use for a TempDataDictionary object is to pass data from an action method when it redirects to another action method. For example, an action method might store information about an error in the controller's TempData property (which returns a TempDataDictionary object) before it calls the RedirectToAction method. The next action method can then handle the error and render a view that displays an error message.
helpful ty.
Want to Learn MVC 5 in 2 days start from the below video :-
goo.gl/1br5mb
The following syllabus has been covered in Learn MVC 5 in 2 days
Learn MVC 5 in 2 days
Lab 1 : - Simple Hello world(20 Minutes)
Lab 2 : - Explain MVC Routing(10 Minutes)?
Lab 3 : - Explain ViewData, ViewBag, TempData & Session Variables?(20 Minutes)
Lab 4 :- Explain Model and Strongly typed views (20 minutes)?
Lab 5 : - Explain Model Binders(10 minutes)?
Lab 6 :- Why MVC and MVC vs Webforms ? (30 minutes)
Lab 7 :- Explain TempData , Peek and Keep ? (10 Minutes)
Lab 8 : - Explain Data Annotations and HTML Helpers classes?(31 Minutes)
Lab 9 : - What is the need of ViewModel in MVC? (10 Minutes)
Lab 10 : - How can we use Entity Framework in MVC?(20 minutes)
Lab 11 : - How to implement viewmodel, partial view and webgrid?(45 minutes)
Lab 12 : - What is the difference between ActionResult and ViewResult in MVC?(10 minutes)
Lab 13 :- How to implement Ajax using Json and Jquery in MVC ? (60 Minutes)
Lab 14 : - What is the use of Async Controllers in MVC?(20 minutes)
Lab 15 :- How to deploy MVC Application on IIS ? (10 minutes)
Lab 16 :- How can we do Windows and Forms Authentication in MVC? (50 Minutes)
Lab 17 : - How can we use MVC areas for better modular development ? (10 Minutes)
Lab 18 :- How to implement MVC with Angular ? (60 minutes) ?
Lab 19 :- Can we Overload MVC Action methods ? (10 Minutes)
Lab 20 :- How to improve Reusability using Angular ? (20 Minutes) ?
Lab 21 :- What is the need of WebAPI in MVC ? (30 Minutes)
Lab 22 : - How to do exception handling in MVC? (30 Minutes)
Lab 23 :- How to do update and delete using MVC , WebAPI , EF and Angular? (30 Minutes)
Lab 24 : - How to use MVC Webgrid?(30 minutes)
Lab 25 :- How to implement Validation using Angular and MVC (30 minutes)?
Lab 26 :- What is SPA (Single page application)?
Lab 27 :- How to Organize MVC project and Understanding CORS issue ? (42 minutes)
Lab 28 :- Explain the importance of DisplayModes ? (10 minutes)
Lab 29 :- How to do unit testing with MVC projects (30 minutes)?
Lab 30 :- How to implement SPA using Angular Routing ?
Lab 31 :- How to create decoupled systems using MVC DI ?
Lab 32 :- How can we have multiple submit buttons in ASP.NET MVC ?
Lab 33 : - What is the importance of AntiForgery in MVC?
Lab 34 :- What is the importance of ValidateInput and AllowHTML in MVC?
Visit us at www.questpond.com for more details
.NET Interview Preparation videos sir from where i can get complete video series please guide
+Naeem Ahmad Please visit www.questpond.com and mail to us on questpond@questpond.com
What is the difference between tempdata keep and peek
PLS MAKE VIDEO ON CASCADING DROP DOWN LIST
LOAD DATA FROM DATABASE AND SAVE DATA TO DATATBASE
tempdata is controller to controller and also controller to view
THank YUo
sir please provide link of how to pass data from view to controller?
So beautiful
I believe Tempdata sends the data from one view to other View..
You can also pass TempData to the View
Sir at 12:07 you have used wrong name of variable in viewbag i.e viewbag.CurrentDateTime instead of Viewbag.CurrentDateAndTime that is why it's null.
how can we create mvc views faster and make them strong typed by using html helper ---where this video?
thanks you so much it was nice explanation
you have given wrong viewbag name in sampleview1 while geting its data in string varible and shown null value
+akshay gaikwad, yes i also caught this problem
Yes. I was thinking about to mention it. But i saw your comment which is related to this. +1
yaa dude you are right
yes, CurrentDateAndTime while in another CurrentDateTime but it will lead to null also if he typed it correct as viewbag cann't transfer data between controllers
Is it really wrong?
At 11:17 he added a value in ViewBag.CurrentDateAndTime but was receiving with ViewBag.CurrentDateTime
That's wrong na?
How will it fetch the value?
you should correct the information, this is a very old video. controller to view is possible in tempdata aslo
In action method samlpeview you mentioned current dateandtime but second action method you mentioned current datetime you don't mentioned and
Sir, I have a question please give me a reply. How do I set session for multiple user login and I want to differentiate as Admin and local user...
through authorization differentiate between admin & local user , also set HttpContext.Current.Session.Timeout = x ,( x is time ) to set diff timeout as per user accessibility..
Create a master base class inherit it on master page
if you are storing information in session about user type
and write a function
if(Session["admin"] !=null){
if(Session["admin"].ToString() == "True")
{
HttpContext.Current.Session.Timeout = 120;
}if(Session["user"].ToString() == "True")
{HttpContext.Current.Session.Timeout = 60;
}else
{HttpContext.Current.Session.Timeout = 30;}
}
or you can replace session with profile if you are using profile
where is the lab 9
its not that we tempdata is not maintain from Controller to View, we can maintain the data
I cannot see any view engine drop down list in the add view page. so I cannot open aspx view. kindly suggest.
Please mail us your query at questpond@questpond.com
If you get the solution please let me know or you can send me an email on ersameer.khan05@gmail.com
hi
Hello
In case of view bag you set another variable and tried to get value from wrong variable. Don't try to confuse viewers and don't anything wrong. Concept is right what you said but demonstrated wrongly.
information are not complete you give so little info
@questpond : Now, We can pass data from controller to view using Tempdata. Please remove your old videoz, i beg. Outdated information can be harmful to your brand.
Excellent video. Thank you very much. I will eventually watch all of your videos.
Excellent video. Thank you very much. I will eventually watch all of your videos.