Viewstate Never Expires Until The Browser Is Closed?

Sep 21, 2009

I have been reading up and trying to understand the difference viewstate and session and as i am only storing a database id i believe i have settled on Viewstate.

Am i right in saying that a viewstate never expires until the browser is closed? One of the issues i have with Sessions is that sometimes the people completling my websites forms can take and age to do so and the session can expire.

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for example i have this code :

Sub Month()
Dim Conn As New Data.OracleClient.OracleConnection
Conn.Open()
Try
Dim Cmd As New Data.OracleClient.OracleCommand
With Cmd

[Code]...

What will happen to the datareader when the Connection is closed ( Conn.close)

Will the Cursor that is used by the datareader be freed ? or will it stay open ?

If the cursor that is used by the datareader is still open , when will it be automatically closed ? or should i just closed it manually ?

Will it cause the dreaded "ORA-01000: maximum open cursors exceeded" ?

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I've seen many things in VB.NET with certificates/licensing but I'm just not familiar with them to be able to take it any further. And right now I don't have the labor to spend hours messing around with it.

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I have user log in logic in my web app. after successful log in, i set the user id in Session, so i can keep track of the user. and in my master file page load event, i do

Session.timeout = 60

so session should timeout after an hour. but my session times out at around 10 - 20 minutes. What am i doing wrong? i bet it's obvious.

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Asp.Net Session Expires Immediately?

Nov 16, 2011

My Asp.net Session Expires immediately even though i did the settings in web.config file,

<system.web>
<sessionState timeout="2880" mode="InProc" cookieless="UseCookies"></sessionState>
<customErrors mode="RemoteOnly"/>

[Code].....

i did above settings in web.config even then it expires after approx 3 minutes..

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FormsAuthTicket Expires IsPersistent Values?

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I have a login with "Remember Me" checkbox forkeeping people logged in but I 'm not understanding the Expiration with IsPersistent values.How would I set the expiration if IsPersistent is True andif the user doesn't check the box then they should be loggedout as soon as they leave the site, How do I set the experationfor that, I'm confused as to what to do.

Code:Private Sub btnLog_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles btnLog.Click Dim accountSystem As Manager.CustomerDB = New Manager.CustomerDB Dim customerID As String =

[code].....

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Asp.net - Active Directory - Check If Password Never Expires?

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[Code]....

Where can I find a list of all available objUser properties?

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ASP.NET Cookie Expires Value Resets On Response.Redirect?

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I have a script that reads a form and puts some info into a cookie:

[Code]...

The time is properly set right before it redirects, but when I try to print out that value this way (I have also tried Dim oCol as HttpCookieCollection = Request.Cookies, but I get the same result):

[Code]...

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I want to create a program that will close itself when the user was idle(not touching/moving the mouse and keyboard) for about 5 minutes...but I have a problem in how to track a user's idle time so that I could set the closing action. Could anyone give me a simple example?

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C# - Redirecting To The Previously Browsed Web Page After Session Expires?

Feb 22, 2012

I'm developing web site using asp.net. In my web site after login i set session for the logged user for my web site need. and on each page i checked whether that session is null or having value and depending on the value i redirected to the login page.My issue is that after login i want to redirect to the previously browsed web page and i done it by using following way-code on the particular page for checking session value-

if (Session["EmployeeID"] != null)
{
}
else

[code]....

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C# - Redirecting To The Previously Browsed Webpage After Session Expires?

Feb 12, 2010

c# - redirecting to the previously browsed web page after session expires

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VS 2010 Trial Version Application That Expires In A Period After Installation

Jan 19, 2011

I have just completed a custom banking & accounting software application for a stingy client who doesnt wants to pay-up! How do i make the application a trail version that will expire in say 30 days, and also ensure that whenever it is installed, it checks for first installation and indicate remaining trial days.

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Check For A Value In ViewState?

Sep 17, 2010

I am new at the ViewState and i am looking to see what values are stored within it. I know how to loop through an array to check for a value but i do not know how to go about doing that for a ViewState("test") property.

Let's say i have added "bob, tom, Jim" to a ViewState called ViewState("test"). I would like to be able to see if "tom" was in the ViewState("test"). If not then add it but if it exists already then skip it.[code]....

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How ViewState In ASP.NET Works

Mar 1, 2009

I thought I knew how ViewState worked, but I was wrong.I don't understand why the following ASPX page preserves the value typed into the TextBox after clicking on the Button?(ViewState is disabled for both the page and the TextBox.)

[Code]...

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.net - Viewstate Becomes Corrupt Intermittently?

Apr 13, 2011

I have had a user of my VB.net web app complain he keeps getting an intermittent error message, causing him to crash out of the system.

Stack Trace:
[FormatException: Invalid character in a Base-64 string.]
System.Convert.FromBase64String(Strings) +0
System.web. UI. LosFormatter.Deserialize(String input) +25

[code]...

It appears from the error message that the viewstate keeps becoming corrupt (see screen-dump below), but I don't understand why. He claims it happens every 2-3 minutes, but I've used the system a lot and have never experienced it.I should mention too that he is using the web-app in a very "non-standard" way. To achieve optimum speed he's actually using remote desktop, to connect to our server directly, and running it as localhost. ("Madness!"- yes, I know. I didn't make the decision.) That may not be relevant of course.

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Dec 31, 2010

Is it possible to make the viewstate false of whole page including all controls at a time.I mean I don't want to set enableviewstate="false" for all controls..In the page directive of the aspx page I have made enableviewstate="false" but still viewstate of all the controls of the is enabled.. And what the EnableViewState="False"actually works within Page directive.

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Asp.net - ViewState Persisted To Session When Using IE (but Not FF)?

Oct 27, 2009

I have a VB.Net web site and on my sign up page I am storing the ViewState in Session. I am using the following code to achieve this.[code].....

This has been working fine for months, then I started seeing the occasional 'System.NullReferenceException: Object reference not set to an instance of an object.'. The exception is raised when I try to get the value of the Text Property from the SelectedItem of a DropDownList, the problem being the DropDownList does not contain items after the page has posted back.The problem is only present when using IE (7 or 8 according to my logs, but I have only tested with 8), but not when using FireFox 3.5.Reverting to using the normal ViewState persistence mechanism caused the page to work in IE again.There are no ViewState related exceptions logged, it is like the page just 'thinks' it has no stored ViewState.

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C# - Worth Compressing The ViewState?

Nov 16, 2010

I agree that the best way to shorten the ViewState is to disable it on the ASP.Net controls that don't need it. Keeping it small from the beginning is a great habit.I have also heard that it is already compressed (although can be true... there are ways of compressing it even more, has described in this Stack Overflow question).

My question here is not if it should be compressed... is: when should ViewState be compressed?If we have a ViewState of 410 characters it will weight 410 bytes in a page, while a ViewState of 13.843 characters equals 13.5 KB.

13.5KB is a considerable weight already. And if I compress a CSS file that height 10KB, I think it is also worthy compressing a ViewState of 13.5KB, even if that means a little extra "thinking" on the server.

But is 410 bytes of ViewState worth the extra processing on the server?At what point is it worth compressing?

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Keep ASP.NET ViewState Without Being Passed Via QueryString?

Jul 19, 2011

I have a form with its method being "get" that passes the variables and their values to the query string, respectively. However, it also passes the viewstate variable in the query string. Now, I have a very long viewstate value on the given page, and if passed in the query string, the viewstate variable will cause the page to error out, due to "too long of a query string" which happens to also be too long of a url.

I cannot merely remove the viewstate variable - I need it. But I need to pass the viewstate variable along via some method other than get when the form is submitted, while the other inputs of the form (the non-hidden inputs) are appended to the query string.

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Save Array In Viewstate?

Apr 28, 2010

I have Dim a(15) as integer i wont to save this array in Viewstate .

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Viewstate Does Not Persist After Postback

Mar 21, 2012

I'm having some problems in persisting the viewstate on postback for a Control (vb.net)

here's some code i've put in my control[code]...

I'm setting EnableViewState = "true" everywhere i can, but still no result. Do i really need to set those properties here. (ViewStateMode and EnableViewState) If not, where should i handle this and what is the difference between those properties?

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VS 2010 ViewState Is Not Declared?

Jan 31, 2012

How do I convert the following ASP code (vb.net) to win form (vb.net)? I get a n error on ViewState.

Protected Sub TextBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles TextBox1.TextChanged, TextBox2.TextChanged
IsSaveRequired = True
End Sub

Protected Sub SaveButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SaveButton.Click
If IsSaveRequired Then save required.
End If
End Sub

[Code]...

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Invalid Viewstate Information May Be Corrupted

Aug 16, 2011

I keep getting the following error message when I run my vb.net web app:The state information is invalid for this page and might be corrupted.After a good search, I came across this Microsoft page, which describes the problem exactly. The likely cause seems to be "scenario 2":[code]I appear to have prevented this error from happening by using EnableEventValidation="False" in the Page node of the markup as recommended here.

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Asp.net - User Control ViewState/State?

Dec 7, 2009

I need help making this code work better. Currently, what happens is when it reloads, I loose the third value which is a calculated value . I would like for my page to reload without loosing the values for each property and each instance of the user control on the page.

[Code]...

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Asp.net Dropdown Listbox Not Holding Viewstate

Aug 5, 2011

I am using VS 2008, VB and using a dorpdown listbox in my asp.net webpage. I select a value from the dropdown, click the submit button, when the page comes back from the server, the value in the dropdown is blank (default). The dropdown controls viewstate is enabled.

[Code]...

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C# - Can't Hide The VIEWSTATE Hidden Field In ASP.NET

Jan 20, 2010

I have to hide the VIEWSTATE and EVENTVALIDATION hidden fields on my ASP.net page at RUN time.

I managed to remove the EVENTVALIDATION like so.............

<%@ Page enableEventValidation="false" EnableViewState="false" %>

But the VIEWSTATE is still there and I cant get rid of it and I need to. (hard to explain why)

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