Solved

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

Posted on 2012-03-17
3
2,688 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

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

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

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

806 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