State Management :: Session Variable Disappears When Leaving Page?

May 14, 2010

I have a session variable which contains a list of elements. The user defines filters, which are sent to the Database, which fills the object with the elements that match. Then, that list is shown in a table. The code goes something like this:

[Code]....

Inside that page there is a button, which sends the request given the user filters. The Server creates the object and the session variable is assigned a value.

[Code]....

It works when the user sets the filters. However, given that once done it, the session variable has a value, I don't understand why if you navigate to other pages, the table doesn't appear when you return, given that:

1. It works when you perform the query and reload the page

2. The Session variable should be set for the rest of the session

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State Management :: Session Variable Looses Its Value On Next Page?

Jul 23, 2010

IDE: MS Visual Studio 2008 / SQL Server 2005 Express / SQL Server Management Studio Express 2005

Skills: Beginner

Well im trying to make a custom login page(im not using ASP.net Login Control), in Admin.aspx page

UserName and Pasword are entered in textboxes , then Code-Behind file checks the UserName and Pasword against DataBase(it stores the UserName and Pasword) if both are correct Session["IsAuthenticated"] = "true" and then user is redirected to AdminArea.aspx

AdminArea.aspx checks if ( Session["IsAuthenticated"].ToString() == "false" ) then redirect to Error page..

but i get NullReferenceException on AdminArea.aspx because Session["IsAuthenticated"] is null , i dont know why ?

I even tried PreviousPage.Session["IsAuthneticated"] but still got the same error..

I debugged,and found out Admin.aspx saves value in Session["IsAuthenticated"] succesfully but AdminArea.aspx looses the Session["IsAuthenticated"]..so it gets null

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Sep 27, 2010

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Jan 19, 2011

I want to show my data in next page with well formated in table.I all ready write code for session which show data in next page.but i want to show it in table format and i also want to comapre in database for a price and show too. this is my code for next page:

[Code]....

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May 17, 2010

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I am now having issues with my hosting where on shared application pool, the worker recycle is triggered every 90 minutes, this will clear sessions causing all my users to be logged out. I opted for a dedicated application pool, which got worse because I am only allocated 50MB memory limit and if this is reached, the worker recycle is triggered and I lose my sessions again. I have tried as much as possible optimization techniques, e.g. dispose where possible, close connections, disable viewstate for static controls etc but my memory per instance keeps building up from page to page without any signs of improvement. I don't use loops nor store huge objects like bitmaps etc but my sessions are now gone even faster than 90 minutes in shared application pool before.

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I am building a web app that is limited to one database, therefore I cannot use the ASP.NET config tool. As a quick means of getting this app online, I tried to use a simple session variable. The login page verifies the user's credentials, and if they pass, it sets the session variable to a certain value. All other pages check in the page_load event whether or not the session variable is equal to that value. The problem is that once being logged in for a short while and sending and recieving some data, the session variable resets, and I'm returned to the login page to repeat the process. Here's the basic code from my webforms:

[code]....

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I added the following code to global.asax to load up several session variable when a session starts. I'm assuming that when a page goes to use the variable that I should be

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[Code]....

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[code]....

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[Code]....

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[code]...

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I cannot get a formview populated using a session variable value from a previous page.

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>
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[Code]....

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