Difference Between Viewstate And Sessions?

May 6, 2010

i want to know what is the difference between viewstate and sessions.

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What is difference between ViewState and Hidden Field in ASP.Net. If possible with an example.

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Now here is the weird thing. First i am running it locally on the built in vs2008 web server.I load my control in fine, do a postback from a linkbutton, locally on my machine it all works fine, no issue.However when it goes onto my host, it falls over with the message:

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.Now i also load controls dynamically and use postbacks and things in the admin area of the site...and that works fine, however my front end just keeps failing? See the code behing below:

[Code]....

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I have problem getting values from viewstate in GetTopThemes.

<asp:ObjectDataSource
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when the page is not Posted back, I saved all values in the viewstate.

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State Management :: ViewState - Does The Master Page Have Its Viewstate

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I have been getting this error a lot lately with some of my users, and I had a couple of concerns with view state and I have read so many articles but I am still lost..

1. I use masterpage on all the pages and I need viewstate for some of the pages but..

There is a page where a user will fill out the information and then submit this data to a cgi server, and it is where I get most of the Client Disconnected errors, what would happen if I disable viewstate when they click on that button?

Now when a user browses from one page to another, does the view state from the previous page get deleted? If not how would I delete it?

Does the master page have its own viewstate? Would I be able to make sure none of items on my master page are using the viewstate?

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C# - Page With ViewState Disabled Still Be Validating A Viewstate Field?

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I have a shopping cart page (Cart.aspx) that has a button that will (sometimes) post to a third party payment gateway, if payment is necessary. The payment gateway will process the payment and then do a silent post to my website (Order.aspx) so I can update the order status.

Order.aspx always throws an invalid viewstate error, even though viewstate is disabled on the page.

What's happening is that Cart.aspx (which has viewstate enabled) posts to the payment gateway, and the gateway will post it back as part of the silent post. Even though Order.aspx has viewstate disabled and validation disabled, it still tries to validate the __viewstate field it's being given.

I know setting EnableViewState=false will disable the rendering of the __viewstate field, but if another page provides the field, shouldn't it still skip validation? I tried calling ViewState.Clear() on the Page_Init event of Order.aspx, but ViewState is apparently empty. how to get around this? I don't want to disable ViewState on Cart.aspx (in some cases it may be necessary), but I can't figure out how to clear it on Order.aspx.

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C# - Using Sessions In Classes?

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have code that's using session variables; it's both in the master page code behind and in the code behind of some aspx files. I wanted to put this code in a function that's in a different file but when I did that, the statement Session["VariableName"] became underlined in red on the word session. What am I missing?

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How Does IIS Recognize Different Sessions In .NET

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Suppose I have logged into an application which is running from IIS. Now I haven't logged out, but closed the browser. And when I'm accessing the application again, it defaults to the login page. How does IIS recognize that it is a new request and redirects the user to the login page?

I have another doubt. Suppose if I'm not closing the browser, which I used when I logged in. I'm opening the new browser to request a page from same application. IIS recognizes that it's a new request to the application and redirects the user to login page. Why does it not use the existing session or cookies which the first browser uses?

We say http is a stateless protocol. Once the page is requested i have logged in.And http protocol connection will be terminated between IIS and browser right? Then iam navigating to other pages in that logged in application. Now iis recognises user has logged in this browser. But when i open a new browser and request that application how does iis recognises it is a new request. Since the http protocol is disconnected, how it works in the first case

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MVC :: Really Need Help With Sessions And Lists

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I have tried everything for weeks with this now but can't get it to work. What I'm trying to do is to store an array in a session and add numbers when a user guesses. I also have to know how to loop through the array.

Please help

[Code]....


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My company took some old php application over. Due to our preference to ASP.net and to the lack of any documentation from the previous developer, we do not want to spend much resources on developing in PHP. For implementing new features, we will create an Asp.net application that has the same look to the user. We want to develop a kind of 'coexisting' web application. Therefore we must share sessions between an PHP and an Asp.net webapplication project, because there is a usermanagement involved with an existing MySQL database.

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How can we share the session between and PHP and an asp.net application?

And does anyone have a hint for this 'coexisting' thing, that might be useful in development?

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The problem which I am facing right now is that when the results page is displayed anyone can press the back button and continue the test and manipulate the result. How can I stop this.

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I have a Asp.net web application that is running on 4.51 , When the User login Successfully i return an Object that has info for that user and store this in a Static object. Now my problem is the i

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VS 2005 Lost Sessions After 30 Minutes?

Mar 24, 2010

I have an application using login-controls.

I have this code in my webconfig:

<authentication mode="Forms" >
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My problem is:

If I do not activate my application for 30 minutes (my customers wants to be online all day without logging out) my session for user login is lost. How can I automatically refresh my sessions if there has been no activity for e.g. 10 minutes? It's a sort of keep-alive that I want. I thought the problem was sloved when I set the timeout to 100000 but it doesn't help

Note. My application works with the remember me function but it losses its sessions after 30 minutes.

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How To Find Information About All Sessions For A Web-app / Site

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I am trying to create an admin screen that will give me details about all open sessions in an application/site. I would also like to know how many session objects are active for each of them

Session object gives me info about my current session. How do i find info about all open sessions. How many sessions are active, etc.

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I need to know how to configure the .config to manage Session state in SQL Server

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My site uses cookies. I need to have it use sessions instead. The reason for this is because there is a third party that needs to connect to it, and it's always requiring 3rd party cookies to be enable in the browser and that is annoying my customers. Is there any other way around this other than switching to sessions?

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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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I have an application with different sections. Each section is accessed through a domain. Example:

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State Management :: Alternatives To Sessions?

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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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Proof That Web Gardens Do Not Fly Well With InProc Sessions?

Dec 2, 2010

I am tinkering with Web Gardens in ASP.NET with IIS 6.0. Multiple sources (Source1 Source2) explain how InProc Session does not fly well with Web Gardens. I built a program to prove it, but the results are difficult to explain. I set the Maximum # of worker processes to 1000 in IIS.I create a web app that stores a string in Session and retrieves the value with a button click. Run web app in IE, FF, and Blackberry browsers.

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When A Few Users Try To Log Into Site - Their Sessions Are Merging?

Feb 16, 2011

i lunched an asp.net web-site. the main idea in the site is that:the site shows the same page, but on each next button the user clicks, the pictures in the site change randomly. im working with postback and sessions.

i noticed that when a few users try to log into my site - their sessions are merging. meaning, the first picture presented is diffrent but the second picture is the same for all the users, and so on... (moreover, pictures that appears in the begining appearing again even thow i don't allw it in my code)when i tried to debug the site locally, the random function works perfectly and there were no such problems. it haapens only when 2 users and more log into my site.

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HttpHandlers / Modules :: Handler And Sessions?

Mar 7, 2011

I have a form with a server side button, clicking on which session variable is added Session.Add("ABC","123")After this (in same postback event), I redirect user to a site, which returns user back to my site. And I still have session "abc" available to me.NOW, In another scenario I am trying to do the same thing but in a handler. I.e.User clicks a clinet side button which redirects users to sameSite.xyz. Handler of xyz adds session variable like above and redirects user to the other site. But, this time when user returns back from other site, my session is lost. How can I imitate scenario 1 with handlers?

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Pass Data Between Pages Without Sessions In MVC?

Jun 11, 2010

I have one application in which I want to pass data between Pages (Views) without sessions. Actually I want to apply some settings to all the pages using query string. For example if my link is like "http://example.com?data=test1", then I want to append this query string to all the link there after and if there is no query string then normal flow.

I was thinking if there is any way that if we get the query string in any link for the web application then some application level user specific property can be set which can be used for subsequent pages.

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VS 2010 Sessions Variables Getting Lost?

Jan 28, 2012

This is my page code

Code:
Protected Sub btnLogin_Click(sender As Object, e As EventArgs) Handles btnLogin.Click
Dim blnLogin As Boolean
blnLogin = Login(txtUserLogin.Text, txtPassword.Text)
If blnLogin = True Then

[Code] .....

So after the user presses the Login button there should be 3 variables stored in a session, this works (checked using trace='true')

Session State
Session KeyTypeValue
LoggedInSystem.String
LoggedInUserSystem.StringUser
LoggedInIDSystem.Int322

That's fine. Now I click on the AddToWall button to check if I can get the LoggedInID, it shows an empty messagebox.

In the trace there are no Sessions keys left.How can I make it keep the keys after postback/after clicking on buttons?

Note: When calling GetFriends(Session("LoggedInUser")) in the same sub as the Login button the variable does get passed to the class with sub GetFriends()

Here's my web.config

Code:
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
<sessionState timeout="30" />
</system.web>
</configuration>

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