About Session Variables Losing Its Values Before Time Out?
Jun 14, 2010
I've got some ASP pages where the session variable values get blown away BEFORE the session times out. I can't understand it. For example: if a user logs into my ASP app using his password which is stored in a session variable, it will be fully accessible for a few minutes and then all of a sudden.....Wham session variable with password value is gone. And the session timeout is far from expired. The session variable is not being touched in any way after it gets initialized with a value.
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Mar 14, 2011
There are a couple of user's experiences session variable loss after they've clicked a confirm button and their information is email via a relay hosting server. Below, I commented exactly where the session variables get lost.
What could be causing the session variable loss? So far, this only happens to a few users.
Part of the email that gets sent out:
[Code]....
Web config file:
[Code]....
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Oct 1, 2010
I have health monitoring enabled on a production system (asp.net webforms .net 4) and I see that there's a lot of errors being sent to me indicating that a session variable has been lost.(I am trying to attach something out of session state to a entity framework data context and get a "Value cannot be null, parameter n ame entity" error). So somehow the session variable now contains null and not an object. Interestingly we have the same application deployed on two separate servers - one DMZ server for external users and one internal server for internal users. Both of these applications on two different servers seem to have the same problem.
Health Monitoring is also monitoring lifetime events and I can see from this that we do not have something like IIS recycling, config changes, changes to bin folder, recompilations etc, occuring. I've read this page: [URL] I can confirm that it's not a Response.Redirect problem because that's not happening - this is an online application form - it puts an object in session state on page_load and there's a multiview - when "next" is pressed, the object comes out of session state, is attached to the data context, changes are made from the web form and the datacontext updated. So there's no response.redirect happening.
I can also confirm the details in "Update 1" and "Update 2" from that link are not relevant to me - there is only 1 worker process running in the application pool and the server name or web address do not contain underscores. I also persued the possibility of session timeouts occuring but they should be handled by other code which is running to detect session timeouts (see: [URL]) which I have tested over and over - Part of the problem is I just cannot reproduce this error myself.......................
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Jun 15, 2010
I need to refresh my webpage in case of a change in the system time. However I see that my session variables are becoming null when the system time changes. So I cannot perform the refresh action since my webpage requests a login.I am not setting the Session variables to null explicitly anywhere in the code. I can't seem to figure out how they are becoming null.
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Oct 18, 2010
We are working in a web application using Session variables to store the clients ID to operate with them in all app (making orders, reports, etc....) but randomly users get the client ID of another user in any moment using the application.
I have tried to solve it in a first step adding to system.web section in the web.config file this:
[Code]....
ASP.NET State Service is running in server normally, It began run just before this last change, but we have not solved the problem either with this solution.
The server is Windows Server 2003 Standard Edition SP2 32bits running IIS 6.0, and the application is made with Framework 2.0
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Aug 16, 2010
I am looking to retrieve data from a database and assign those values to class objects which in turn will be turned into session variables. I am using an object datasource to retrieve the data from the database but I cannot find anywhere that shows how to assign these values to variables. The data is returned in a dataset. There is the added problem that there will be mulitple items returned which will have to be assigned to different arraylists of objects based on the a primary key in the database.
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Aug 8, 2010
i am trying to collect 2 variables from one hyperlink, and use those variables in the page_load to set as session. but i don't know how to collect those 2 variables
such :
<a href="javascript:;" onclick="wsChangeColor('mainData', '#FF0000','#FFE4E1');return false;" title="Change color" id="red">1</a>
i would like to collect '#FF0000','#FFE4E1' or direct set '#FF0000','#FFE4E1' to string then send to pageload, how can i do this by only clicking on it ?
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Sep 1, 2010
I have been using session variables in my asp.net application for passing the next property:
[DefaultValue(true)]
public bool IsModificationMode
{
get
{
return (bool)Session["ModificationMode"];
}
set { Session["ModificationMode"] = value; }
}
In the PageLoad, I set it's value.
Now after the Postback, I am losing it's value having a a NullReferenceException
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Oct 11, 2010
I use some session variables to get the job done(shopping cart, etc) but it is not stable..manytimes I get no items in session object and other times(refreshing the page) I get missing data...I downloaded the entire site code to my local pc and debugged it and run it succesfully without any session data missing...When I run it in the server, I get bad session again: no products in shopping cart or products with missing quantities...
The same website runs smoothly in our production server too....The problem is with our development server...
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Nov 11, 2010
I have some code in my page load event where I just want to fire once when the user opens the Browser. The only issue is if you open a new tab with the same website the session variable does not reset. Is there a way to reset the session variable when you open a new tab or do you have to take the whole web browser down for it to clear the session variable.
In Global Page:
[code]....
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Jun 29, 2010
I thought about saving all sessions variables to hiddens and then resaving those values back into session after I changed the web config..but there has GOT to be another way.
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Nov 12, 2010
There are reams of info out there about things causing InProc session to drop session objects, but that's not what's happening here. We're missing individual variables within stable InProc session objects, and are not sure whether they're not being written or being lost after a successful write. I've confirmed with WinDBG that the sessions are live and contain some, but not all, of the data written to them.
Guid g = System.Guid.NewGuid();
this.Context.Session.Add(g.ToString(), result.ImageData);
output.Write("<img src="display.aspx?id=" + g.ToString() + "">");
This code is pretty straightforward, and it works flawlessly in Test. In Production, under heavy load, though, it fails ~1% of the time. If Mr Smith visits the site and attempts to display 4 pieces of image data, 2 of them might be saved in his session and two of them be lost. The InProc session object for Mr. Smith exists. The traffic logs show he clicked 4 times, each with a different id param. But there are only 2 guids in his InProc session object, instead of 4. The 2 session objects we did capture do correspond to 2 of the id's shown in the traffic log (his 1st and 3rd clicks.) The traffic logs for his 2nd and 4th clicks, though, show a guid id that's not in his InProc session object.
Lines 1&3 of the above code obviously worked for those 2nd and 4th clicks, or he'd not have had the id in the URI for him to click. Line 2, however seems to have failed silently in some way. If any exception had been thrown, I'd expect we'd not ever have arrived at line 3. I can't see any way for the user to receive the guid id, but the session to fail to have it. The other possibility is line 2 worked successfully, but the variable later disappeared, how I cannot even imagine.
Details:
ASP.NET v3.5
IIS 6
No Web Gardening
We're running a web farm, but users constantly return to the same server. I'm researching now whether there's any way users might be slipping off to the other server.
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Oct 14, 2010
I am facing a very strange issue. I get an error Object Reference Not set to instance of object on the server while the code runs fine on my dev machine. The strange part is the line number where the code is throwing error (as appears in the Stack trace)
DemoUser demoUser = new DemoUser();
if (!Request.QueryString.AllKeys.Contains("name"))
{
playerName = usr.NinjaName;
demoUser.Email = usr.UserEmail;
demoUser.UserPicture = usr.UserPicture;
}
else
{
playerName = Request.QueryString["name"];
demoUser.Email = String.Empty;
demoUser.UserPicture = "http://graph.facebook.com/1/picture";
}
demoUser.EntryDateTime = DateTime.Now;
demoUser.Name = playerName;
Session["DemoUser"] = demoUser;
imgPlayer.ImageUrl = demoUser.UserPicture; // This is throwing error.
If that line is throwing error then the demoUser object is getting lost when I assign it to Session. Is that right?
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May 12, 2010
So to pretty much make this short and sweet, I have a page variable defined outside of all my methods and functions called buttonpressed. It is used to keep track of which button has been pressed on the app. For example, in the onclick event of my Edit button there is a line:
buttonpressed = "Edit"
I use this to decide what kind of query to perform to my database. My problem is whenever I hit my save button(which uses that buttonpressed value in an if statement to decide what query to perform), the variable value just magically disappears.
I tracked the value to make sure that it is being changed and store correctly based on my add, edit, and delete buttons. As soon as I hit my save button, the value of that variable goes blank.
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May 10, 2010
I have a asp.net application where I am saving off into session the user privilege information. From a grid I am bring up a new window by using the window.open. It seems that it is whiping out the values in session. A temporary bandaid I have placed on it is to recall the database if the value is nothing to reset the user object. I have found all over the internet that this is an issue with the window.open in IE 7 and IE 8. Has anyone else run into this and able to actually fix it?
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Jan 28, 2010
I am using partially secured pages ( SSL). Now the problem is when I am switching between HTTPS and HTTP, I am losing my session. I tried storing session in Sql Server Database, its still not working. I am using just ONE web server and all pages are in single application.I am using Sql server 2008 ,IIS 7.0, C#.Net 3.5 I created a self signed test certificate to test my application.
I understand that I am losing my session because my urls are changing with https and http but there has to be someway to overcome this problem. I dont want to put unnecessary load on pages which do not have sensitive data by using https.
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Mar 14, 2011
OS: Windows 7
VS: VS 2010 Pro SP1 - IIS Express
I am debugging my project, the first page is a login page which I login and I can see from debug that the session is being set, after the redirect to the homepage the session seems to be lost and I am taken back to the login page.
If I run outside of VS on our sandbox or production server the login works fine. It only seems to be my machine w/ VS that does not like the sessions.
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Oct 25, 2010
This is weird. In my newly developed chat application, when I invoke Response.Redirect, I am losing my session data. What is particualrly odd is that this sometimes seems to occur after a slight delay, so I reach the page, and then the session info gets lost momentarily thereafter. Mostly though it seems to get lost immediately. I have of course googled this issue, but yet to find anything that speaks to my problem. SessionState is in InProc mode. Session state has been working fine for me until this unexpected problem, so everything is configured right. So far the only workaround I can think of is to use a link instead of a button, and use javascript to call a server-side function on onclick to do the work I need to do before the link gets invoked. Messy, and I'd rather not go that way unless there's no alternative.
Just to preempt one red herring, I do use Response.Redirect(<address>, false).
The problem occurs both on the testing and production servers. I'm running ASP.NET 3.5 on IIS7.
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Jan 8, 2010
How do you work-around the fact that sessions are dropped every time you deploy certain code files to an ASP.NET website? Sometimes we need to deploy a crucial fix in the middle of the day but don't want to boot off all our users for it.
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Oct 1, 2010
i have two text boxes and one button in web form. I need to display the contents of text boxes in a datatable in the same form, when i click on the button.
How can i do this using session array. I need to store values in session array. and get back the values from session when i need .
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Dec 15, 2010
I have a file delete option for the files uploaded by the user, user can upload many files at a time.The uploaded files will be stored in a folder in server and when its is deleted its is moved to trash folder from where it will be manually cleared.
when a user tries to delete many files in the web page IIS get hangs and all session is expired. This case only present in server,in local host this issue is not available.
ALL the operations is carried out completely ie
Database gets updated. Files is moved from upload folder to trash folder in server.
I cannot determine what is going wrong,I just tried to delete many files totally around 35-36 MB. Is the issue with process taking long or is there any changes have to be made in order to perform large files operation, my project is done on VS2005 which is running in 2008 server.
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Nov 24, 2010
I've created loads of user controls, but this is my first time dealing with extending a server control. The problem I'm getting is that the base control's data is not being persisted across postbacks in a Master/Content page.I'm actually trying to get this working using a Telerik control (for my sins), but the same issue happens with a standard Web TextBox control. Code:
[Code]....
Now, I've copied the way I handle the control state as I do it with user controls (ControlState), and it isn't working. Can someone point me in the right direction please? All the examples I find refer to creating user controls, not extending existing controls. Specifically why nothing is being persisted on post back.
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Dec 24, 2010
Where exactly are session variables saved? Cookies? Server memory? Again where are Application variables saved?
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Mar 22, 2010
I need to clear all sessions at the end of my application, to many to list individually.
So I have found the following ways, but which is best?
Session.Clear();
Session.Abandon();
Session.RemoveAll();
And then the specific way
Session.Remove("variable");
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Jan 27, 2010
Am trying to design login page for my website and I am looking for methods other than forms authentication. The way in which I am trying is to have a table in the database that stores user information and check for the user validity.
The point where I get struck is how do i set cookies and session variables and how will I carry it through out the system. Can anyone tell/suggest me where I can relevant material so as to move forward. And also is my idea of negating traditional forms authentication and going for a model I described, is it good also does any other better method exist?
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