State Management :: Sharing Data Between Sessions?
Nov 5, 2010
how do i pass data between two asp.net webservice sessions ?
this is the scenario, we've windows application and web service. our windows app calls a third party web site which requires data from our applciation. this 3rd party suggested that we create a web service that they can call from the web site.
after some reading it looks like i can use "application" object to store the data so that we store data in session with a specific session key and give it to web site and web site passes this session key in all methods it uses in webservice. is this best approach to take ?
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Mar 25, 2010
My prior asp.net apps used windows authentication on an intranet. Now I'm developing an app for the internet and am stumbling over how to properly manage user sessions and state.
I first developed my web site functionality; created the SQL DB and got all of the pages to properly handle the data. Then, I installed the SQL Membership database and was able to get the CreateUser, Login, Logout pages to work. On the Verify process for the Userid, I added a step that will take the membership UserId value and create a Company record in my tables and link my CompanyId key with the UserId.
At Login time, I create a CompanyId session variable; each page uses it to retrieve records for the user. When Session Timeout occurs and the user click a link to another page, the app redirects properly to a Login page. However, if the time expires and then the user interacts on that same page, 'Object not set to an instance of the object' - the CompanyId session variable has expired.
What is the proper way to handle this? I'd like the page to automatically redirect to a TimedOut page (this would happen automatically without the user doing anything).
I considered writing a Function where I pass the Session variable I want and the Function sees if it exists; if it doesn't it would do a Response.Redirect to the TimedOut page...I can't get the Redirect to work in a Class Function ('reference to a non-shared member...').
I assumed that I should set CompanyId as a Session Variable so each page knows the user to get data for. Another approach is to use the membership User and if it is still valid, do a DB lookup to get the CompanyId. I did not choose this because I felt that it would increase DB traffic and web traffic.
Here are several relevant settings from my web.config:
<sessionState cookieless="UseDeviceProfile" />
<authentication mode="Forms">
<forms loginUrl="~/UserTasks/Login.aspx" />
It feels like there should be a straightforward answer to this but I am missing it.
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May 20, 2010
If affinity is set to use multi core, aspnet_wp would be run individually on all cores.
So sessionstate, application and cache objects would be core specific. Is this understanding correct ?
Is there a way to share state - session, cache objects?
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Feb 22, 2011
1. I am using Session to maintain some value. I have to read some value from a one sessions value in another session. Here I think i can maintain it using cookie or maintaining the session in state server or sql server. but I want to know is there any other approach in maintaing the state in client side .
2. I have set the session variable in page load . after that i am trying to access the session value in web service consumed by that webiste. but I was not able get the same session in web service. can i know what is work around I need to do for getting the same session in web service also.
3. I need to bind a gridview using javascript ,Can i create the source for binding to it in javascript itself. i mean like datatable.
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Nov 2, 2010
i have a situation where worker process recycling is causing session to expire and loose all the session data. Change to State Server and SQL server seems to be very complicated and impossible beacuse we use third party objects which are non-serializable. We need to let users keep running our ship tracking website for weeks or months beacuse they use it in their lobby and they do not want to touch it again. What alternatives i have if worker process recycles which causes to loose session data. I will need to atleast retain their user id and password to autologin them incase session expires.
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Jul 12, 2010
In my website I am maintaining cookies for the login so that if I open the browser again then no need to login again.
But when I am switching browser(from ie to ff or viceversa) then the cookies are lost and the user is not identified, I want to maintain them in this scenario also.
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Aug 30, 2010
#Newbie alert# Only 8 months experience with school education back in 2002.
I'm using VS 2008, C# 3.5 to develop my own login system for our company website.
Originally we have a "simple" design which only had a login and order page.
That order page needs to be opened for 10-12 hours at the time while our stores are opened without having to relog into the system for each query.
We also have a requirement that some users need to access 2 different compagnies (separate inventories) which require 2 different logins.
I solved that "cross over" session problem by moving all the values into viewstate with my own viewstate manager class right after the login.
Now my problem is that we are adding more and more pages and I don't want to be stuck with the problem to resave the viewstate to session and then back on viewstate for every menu items and buttons.
Is there a way to create some sort of items list of all the sessions opened by the user and only transmit that from pages to pages?
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Dec 31, 2010
This last week I had an issue about refreshing all open sessions on an asp.net web site. The scenario it's like this:
It's a LAN application with different roles (let's say "Role A" and "Role B") and a database of SQL server.
Any "Role A" user can click a button and start something like a survey (defines a query and the possible options).
Then, any "Role B" user have to answer that survey (just once).
Here comes my problem...if I am a "Role B" user, and I have the "AnswerToSurvey.aspx" page open...how it can automatically update or refresh after the "Role A" user inserted the survey? I mean, I know that if I press F5 I will achieve it, or even using asp:Timer or javascript timer, but any of them are precise.
Any suggest? I've tried using Global.asax Application_BeginRequest and so, but no lucky. Is there any effective way to notifiy a user that something has changed? I'm not looking for a "chat like" system, just notify any "Role B" user about the change.
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Feb 9, 2011
I have a asp.net page with a codebehind. I have 2 buttons on the page. When clicking on button 1 I get some data from my database and save it for later use in Sessions.
[Code]....
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Jul 30, 2010
Is it possible to share a cache between multiple ASP.NET applications? The apps may reside on different servers. How can one achieve this requirement?
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Aug 13, 2010
I have a website A which has a link to website B which is currently opening in a different window. When clicked on a link to, the login for B is automatically taken care of as both the websites have same user login credentials.
Now a change in the system has made me embed website B into website A. ie., B will open in the same window of A.. I could achieve this using an IFrame. Now, the session from site A needs to be carried out to site B. Presently, when navigated from A to B, all the sessions on A expire. Once navigated to B the session time out of B from the webconfig is taken. I have used "InProc" as my state management option in web config. Is it possible to maintain single session for both the webistes? If not how to continue same session times for both webistes? I do not want to use "SQL server" state mode.
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Oct 18, 2010
I would like to share the session variables between 2 applications. basically I have a website and in there I have 2 applications and want to share the session object betwen the two. Is there a way to set something in web.config to enable this?
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Apr 21, 2010
I've been working on this problem for some time without success. We have this website that has been working for many years now and we have been using cookieless sessions since the begining. Now we are integrating with another site to handle payment throught redirection. This provider ask for two adresses for success or failure of a payment so we have something like [URL] and [URL]. For design purpose thoses two pages do not exists and I use an httpModule to route to the proper page. I use httpApplication.Context.RewritePath to send to the proper page but I can never find back the session my user had before redirecting to the payment provider.
If I change the session mecanism to use cookies (cookieless="false" or cookieless="UseUri") with a few other tweaks, everything works fine Does anybody know if this has a chance to work? Is there a way to re-attach to an existing session?
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Apr 23, 2010
I am saving for each user a session with information about his current page viewing.
Each time the user is moving to a new page, I am updating the session with the new page he is right now.
Now, my question is if I can make any loop over all of my users session and answer a question like: How many users are now on page "2.aspx" for example?
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Mar 21, 2010
I am trying to create a system in which there will be a single user accessing his acount from two endpoints simultanously.
I think this is possible.
1) How to restrict the user to have only one session at a time?
2) How to change it to have limited number of sessions per user at a time?
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Apr 14, 2010
I am having two aspx pages(Page1.aspx,Page2.aspx).I am stioring values in Session in Page1.aspx and retriving the same values from Page2.aspx.But if the session value is null I am getting an error as 'Object reference not set to an instance of an object.'Here is my code..
[Code]....
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Aug 4, 2010
We have take over a classic asp site. Everything works fine, but we are making improvements to some reports and adding new reports, so we are doing this in .NET, with that said, after reviewing the secuirty code, there are 2 sessions that are set and used thru-out the site as part of some of the individual page queries.
I know that the sessions are being populated, because the reports that use those values return records.. now with a new report we are working on, i need to pass those values into my query. But when i try using the session names the page is coming up saying the following:Object reference not set to an instance of an object.
Is there anyway to add something to my page code to see what sessions are actually being created and their values.. maybe im using the wrong variable names.. but the security code is pretty straight forward.. at login, if successful, 2 values are returned and stored in 2 sessions.. i need to use those with my new page.. so trying to figure out why the existing pages work fine with that and my new page does not..
Basically, i'd like to write to the screen the session variables that are being created on the login page.
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Jul 7, 2010
I have an asp.net solution in which there are two web application projects (client website and admin website) and also a class liabrary project in the same solution . In the live production server, the admin web app is within the client app (eg: client site= [URL] and admin site=[URL]). A class (with static variables) in class liabrary is userd to cache data. My problem is that i cannot get the changes to the static cache by one web project reflected to the other (becoz, i think, they seem to load in seperate appdomains).
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Feb 3, 2011
After doing some research, I found that <sessionState> can be hosted in SQL Server allowing applications to read from the same source. Essentially my app has two sides: a WCF library and an ASP.NET MVC 3 web site, the WCF has authentication and other DB IO methods and the MVC does the display. Now, the MVC stores a value in the session and then the WCF reads it and creates another for the MVC to read later. Problem is, neither can read each others session data, they can write to the same repository but can't share.
How do I go about them sharing the same information? How can I tell <sessionState> that the session started on the MVC side is the same as the WCF side and viceversa? I've tried
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Jul 14, 2010
i have two solutions, 1. user management and 2. travel management. i publish the user management solution to [URL] and i publish the travel management to [URL] here i face the problem. the default home page would be [URL], its a windows authentication in page load, i capture the username, pass it to procedure which will fetch me his credentials on access. i store these in a session.
in the home page i have link to navigate to travel page, when i try to access the sessions in travel page, its empty. i tried printing the session id in both user management and travel, both are same but the sessions created in user management are empty in travel. what would be problem here and how can i resolve this.
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May 17, 2010
If I want to share cookies among applications, applications need to be in the same domain. In production it is no problem. But I have problem with development. If I run those applications in Visual Studio, it runs application in "localhost" and it is not same domain. I don`t see cookies among applications.
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Apr 23, 2010
I have a session state that myself and others on my team have been bashing our heads against the wall for the past week. We have tracked it down to the following:
1) Frame page containing content pages creates a session
2) Content page creates a session, stores data in the session
3) User changes drop down list with SelectedIndexChanged autopost back and displayed fields are changed using an UpdatePanel. A new session is created, data stored in the prev. session is lost
4) User posts back, no session is created this time, however the post back fails because the session from step 2 is lost.
Now, a user closes the page, comes back, and it actually starts to work:
1) Frame page containing content page opens (no new session)
2) Content page loads data, stores in session (no new session)
3) User changes drop down list with SelectedIndexChanged auto postback and displayed fields are changed using an UpdatePanel. Sesson NOT lost
4) User posts back form, success
ASP.NET on the first visit to the site insists on creating 3 sessions, we log it in Session_Start. I can't think of any reason this should happen. I've been told the frame will always be on a seperate session; thats fine, its only being used to setup scrolling
within a frame in Dynamics CRM. The biggest question is why when we insert data into the session in step #2, it is discarded in step #3.... but only during the first visit to the page!
I've never seen this session behavior before; we don't have any session abandonments in our code, and we never clear session objects, so there shouldn't be any reason for the session to be lost.
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Aug 9, 2010
I have an ASP .NET website that uses cookieless sessions When the initial request is made to the site IE just displays the standard "Internet Explorer cannot display the webpage" message Firefox displays the following message: The page isn't redirecting properly Firefox has detected that the server is redirecting the request for this address in a way that will never complete. *This problem can sometimes be caused by disabling or refusing to accept cookies. The site works fine with my development server and under IIS6. If I switch off cookieless sessions then everything is fine
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Dec 30, 2010
A value needs to be passed from an asp.net application to another within the same domain. How we can do?
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Jan 21, 2011
I built an intranet application using code from this project (link and more details below):
Everything seemed to work during testing, but when multiple people are using the shopping cart, items show up across sessions.
For instance, if two orders are created at the same time, an item in Order 1 will show up in Order 2 by hitting the shopping cart refresh button.
Order 1 and Order 2 are two separate computers and being used by two different logins. Cookies are enabled in the browsers.
when an item is added like this: ShoppingCart.Instance.AddItem(arryProductId(i))
Should it not add that to a unique instance of the cart and nobody else be able to see these items?
We are getting ready to deploy this and this is a major issue. Any help would be greatly appreciated.
-=-=-=-=-
http://www.ajaxprojects.com/ajax/tutorialdetails.php?itemid=423
An instance of the shopping cart is created like this:
If HttpContext.Current.Session("ASPNETShoppingCart") Is Nothing Then
Instance = New ShoppingCart()
Instance.Items = New List(Of CartItem)
HttpContext.Current.Session("ASPNETShoppingCart") = Instance
Else
Instance = CType(HttpContext.Current.Session("ASPNETShoppingCart"), ShoppingCart)
End If
When I insert items, they are added like so:
ShoppingCart.Instance.AddItem(arryProductId(i))
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