Solved

How can I access ViewState in a class other than a code-behind file?

Posted on 2012-03-17
3
2,750 Views
Last Modified: 2012-03-26
For both Session State and Application State, we can access the values stored there from a class other than a code-behind file by using the Current property of the HttpContext class. For example:
•      HttpContext.Current.Application["HitCount"];
•      HttpContext.Current.Session["Email"].ToString();
If we were in the code-behind file, we could access these by simply using
•      Application["HitCount"]
•      Session["Email"].ToString()
For View State, how can we access values stored in View State when we are in a class other than a code-behind file?

I experimented a bit, and verified a method in a class located in the App_Code folder would not recognize Session or Application unless I preceded it with HttpContext.Current. Further, it did not recognize ViewState at all. Further, I found that "static" methods in any class (including the code-behind) would fit this scenario where the HttpConext.Current would need to precede the Session and Application in order to be recognized, and the ViewState is not recognized at all (at least not by the Intellisence of Visual Studio 2008). How can I get ViewState from the page to be recognized in these methods/classes?
0
Comment
Question by:dwoolley3
3 Comments
 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 100 total points
ID: 37733882
Have you considered taking in a parameter of type System.Web.UI.StateBag? Then you can simply pass the ViewState from your page.
0
 
LVL 58

Accepted Solution

by:
amit_g earned 350 total points
ID: 37733894
ViewState is about the page and that is why it is available within the page only unlike Application or Session that are applicable to all the pages. If you need to access it in another class, it needs to be passed to that class from the calling page. You cannot (and should not) access page's ViewState in any random class unless that class is being instantiated from the Page itself.
0
 
LVL 14

Assisted Solution

by:quizwedge
quizwedge earned 50 total points
ID: 37750181
As others said, you can't directly access it (or at least shouldn't if you find some hack.) Here are two examples of how to pass the information, one of which is the StateBag method mentioned by kaufmed.

http://stackoverflow.com/questions/2445155/can-i-access-viewstate-of-one-page-in-another-page-in-asp-net
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

789 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question