State Management :: How To Make A Custom Property Or A Page Persist Across Postback

Sep 29, 2010

I have an object to hold some specific state information in my web application - I pass it back & forward between pages by making it a property of a basepage which works fine, but I lose it on postback.

Is there any way to persist this property without manually adding & reading it again from viewstate?

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Similar Messages:

State Management :: How To Persist A Class Object When Page PostBack

Oct 5, 2010

i have created a user control UserControl.ascx, in Code behind file of UserControl.ascx i have created an object of a class MyClass.cs,

Like

if(!Page.IsPostback) {
objMyClass= new MyClass();
}

but when i click on button of UserControl.ascx page and try to access objMyClass object then it set as null, so how to persist MyClass object when page PostBack, i wanted to keep object persist till the user access the page, when user goes out of this page then object should distroy?

[code].....

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State Management :: Session Does Not Persist After Postback On Deployment

Nov 22, 2010

I ve been searching for this on various forums and came through a number of supposed solutions which didnt work for me.

My web form works perfectly for me when on development and after publishing on IIS but when I try to access remotely the session value is always null.

I do these things in the following order and when accessing remotely I always get the exception i throw when session is null.

I debugged it and my list is never null when reaching the assignment point.

[code]....

in webconfig I have the following tag which I saw as an answer in many forums

<sessionState mode="InProc" cookieless="true" timeout="200" />

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State Management :: Update User Control Property On Postback?

Mar 31, 2011

I have created a user control with a property named CurrentPage. When a link button is clicked it runs PostbackToPage() and passes a command argument in which then sets the CurrentPage property with this new value. On the page which uses the user control I am trying to display the updated CurrentPage property after a postback. When I click the link button to cause the postback the CurrentPage is the default value. However when I click it again it works as expected. So it seems to only work after 2 postbacks. How can I get this to work after the first postback?

User control code behind:

[Code]....

User control design:

[Code]....

Page which uses user control:

[Code]....

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Custom Server Controls :: Custom Control's Children Do Not Persist Contents After Postback

Feb 25, 2011

I have created a really simple custom control to render panels into a page. The code is below. When I use my control and add any webcontrol to it, after each page postback the contents of these child controls vanishes.

I must have missed something really simple but run the example to reproduce this. Can anyone please enlighten me as to why the controls are being 'emptied' of their contents, and how I stop this occuring?

Here is the code for the control

[Code]....

And here's how I am using it in a sample page:

[Code]....

[Code]....

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Web Forms :: How To Persist The State Of Object On Postback

Jan 26, 2011

I bind textbox to a property of an object. After running the app, if the value of textbox is changed, I expect the object to update this property .This does not happen. I also understand that I am recreating the object from viewstate on postback, which is wrong. how to persist the state of object on postbacks all.

[Code]....

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State Management :: Gridview CheckBox Persist In Paging?

Oct 6, 2010

Related to this thread: Gridview CheckBox Persist in Paging

Is there any other option than ViewState or Session to save the datatable ?

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State Management :: Cookies Just Dont Persist Locally?

Apr 14, 2010

I've been trying to add a little Remember Me in my login page and been suffering 2 days with this cookie problem.This is how I set the cookie:

HttpCookie coo = new HttpCookie("test");

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State Management :: Session Variables Persist Between HTTP And HTTPS?

Feb 10, 2010

Just wondering whether or not Session Variables that are declared and set while in a HTTP session will continue to exist if the users session moves to HTTPS?

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State Management :: Make ID For Each Page So VB Knows What To Load?

Mar 10, 2011

I have a script that loads diferent photo in same div on masterpage for diferent pages.

So my question is how can I know what page is currently loaded so I can use something like this:

onpageload...
Dim pageID as String
pageID = ?????????
If pageID = "default1.aspx" Then
image1.ImageUrl = "~/zagreb.jpg"
ElseIf pageID = "default2.aspx" Then
image1.ImageUrl = "~/split.jpg"
End If

maybe I can put some kind of ID on every page but how?

HTTPresponse does not help to much becouse links looks diferent every time (default.aspx?sasa , default.aspx876786 .....)

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State Management :: Does A Page Unique Id That Is Accessable Before And After Postback In Page_Init?

Apr 9, 2010

I do some dynamic stuff with UpdatePanel controls and it would be great to store stuff in a Session key and be able to grab it immediately with confidence in a Page_Init. Fantasy e.g.,

If(!isPostBack)
Session[pageInstanceID + "ThekeyIWantAccessTo"] = "123";
else
locVarValue = Session[pageInstanceID + "ThekeyIWantAccessTo"] +"";

I want something like this so that even if an individual user has two or more instances of that page open I am able to respond correctly to the immediate instance in Page_Init. Is it possible to achieve what I want or some facsimile of same? I know I can speculatively make an assumption and then check it in Page_Load when I have access to ViewState, but I would like something that approaches a best practice.

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State Management :: Value Of The Cookie To Increase Only If The Page Is Not Being Accessed Due To A Postback?

Nov 29, 2010

I need to write code that displays the number of times a user has accessed it. I need the value of the cookie to increase only if the page is not being accessed due to a postback.So basically it will display the following on screen: 'you have visited this site 10 times' What language I use is up to me but I prefer working with VB in asp.net

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State Management :: Session Data Lost On Postback Of The Page In Windows XP?

Apr 26, 2010

asp.net session data lost on postback of the page in windows XP.

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How To Persist Page State Across Pages

Mar 24, 2011

I need a way to save and load the Page State in a persistent manner (Session). The Project i need this for is an Intranet Web Application which has several Configuration Pages and some of them need a Confirmation if they are about to be saved. The Confirmation Page has to be a seperate Page. The use of JavaScript is not possible due to limitations i am bound to. This is what i could come up with so far:

[code]....

I can't seem to find a way to load the Page State after being redirected from the Confirmation.aspx to the PageToConfirm.aspx.

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State Management :: Unable To Make The Session State Request

Apr 21, 2010

Our Web Server rebooted due to power failure. Now ASP.Net State service would not start logging the following error on the server:

Unable to make the Session State Request to the session state server. Last known phase=Sending request to the state server

how to bring back the ASP.Net State service.

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Make Telerik TabStrip Tabs Persist Between Page Requests

Aug 27, 2010

in Telerik ASP.NET MVC TabStrip, I want the page to remember which tab was selected last and persist the selection through multiple page requests.

What I have is a partial view that shows in multiple pages and it contains the TabStrip. With SelectedIndex the set tab always get selected, which nullifies user's selection.

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State Management :: Custom Control: State Restoring For Controls Created With CreateChildControls

Dec 22, 2010

Let me explain, describing the scenario:In a custom server control (in my case, derived from CompositeControl), in the overidden CreateChildControls method I create a complex tree of subcontrols, using information from a db.The db provides both information on which controls I need to create (the user interface's structure) and the data used to fill these controls.Than the user can interact with the control and change the data (that becomes different to what stored on db).

My custom control lives in the same page where there are other controls, obviously.And these controls can cause a postback at any time.What I need is that my custom control keeps the data entered by the user across these postback, without reverting to the original data and loose the user data entry.

Here is the first doubt:

1)I create the subcontrols dinamically in the CreateChildControls at any page refresh (both on first call than on postback).I know that the framework solves the reference between the posted data and the controls I create in the CreateChildControls in order to set properties and raise control events, but can you tell me when and how it actually does this? In which phase of page life cycle? What happens after the CreateChildControls?

A second doubt:2)If the user interface structure must change as a consequence of the data entered, I had to execute CreateChildControls twice (the first time to recreate the original interface to get the events and the second time to create the new interface)
In which phase of page/control lifecycle do I have to make the second call to CreateChildControls? I do it on Prerender now, but is it right or wrong, and why?

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State Management :: Manage Custom Objects And Session State?

Oct 6, 2010

I've created a whole bunch of rather complex classes and now i'm starting to work on the ASP.net user interface. Basically the user will open 1 page which will be used to load, edit, save an object. The object has many fields and they are often other classes i've created. To create a nice interface i've used popups and used AJAX to reload parts of the page to avoid reloading the whole thing.

My plan was to create the object and save it to the session. Then each time the page is loaded copy the object values to the asp fields and do the reverse when the page has been submitted copying the asp values to the object field then updating the session object.

So the code will go something like:

onload:

if session is not null load from session otherwise create new
this.txtID.text = object.id
this.txtName.text = object.name
etc etc

on submit:

object.id = this.txtID.text
object.name = this.txtName.text
etc etc
update session.

Is this what you guys would do? or am i over thinking this, seems like a lot of code to load all the object fields each time the page is opened and submitted etc.

Just looking to bounce ideas of off other developers :D

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State Management :: How To Custom Controls And ViewState Management

Aug 24, 2010

I want to know that when we create custom controls, then is there State Management through ViewState done automatically or we have to handle it explicitely ?Since i have created Custom Controls that is behaving as if it is not maintaining its state on PostBack.

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State Management :: Creating Custom Session Management?

Nov 10, 2010

I want to know how can I write custom session management mechanism in ASP.NET. I do not want to use cookies or URL to have my session ID thus I think I can not use SessionIDManager. I will like to save the sessionID in a post variable and at server I will like to extract this ID to map with session.

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Custom Server Controls :: Custom Radio Button Loses State After Postback?

Mar 24, 2010

I have a custom radiobutton and it renders fine but loses state after postback.

How can it be modified?

[Code]....

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State Management :: Adding A Custom Object In Custom Principal?

Dec 27, 2010

I have Create a Custom Principal and a Custom Identiy for my Web Application and upon forms authentication

1 Create a profile of type object

2 Assign it to the Principal profile

3 assign the principal to the Http.Current.User (this now has the complete profile information )

As i understand upon redirection the principal is recreated and i loose the information i had stored in the profile.

I there a way to persist the profile information ?

I though can achieve persisting some information using FormsAuthenticationTicket in userData but that wouldent solve my purpose ..

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State Management :: Keep Panel State After Postback?

Apr 27, 2010

I have the following tabs. After a postback, the tabs automatically gets focus back to 0. I want it to keep on the same tab before the postback. What's a great way of getting this done.

<div id="settingspagetab">
<ul>
<li><a href="javascript:void(0)" onclick="changeTab(0)">General</a></li>
<li><a href="javascript:void(0)" onclick="changeTab(1)">Site Layout</a></li>
<li><a href="javascript:void(0)" onclick="changeTab(2)">Marketing</a></li>

[Code]....

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State Management :: Using Application_Error For Redirection / Application_Error To Redirect The User To A Custom Error Page?

Oct 11, 2010

I am trying to use the Application_Error to redirect the user to a custom error page. I know I could use the web.config to do this, but let's assume for now that this is not a desirable path to take.

Initially, I tried to do a Response.Redirect to perform this, however, there seem to be occasions where the current http context does not define the response object. So, I attempted to perform a check to make sure that the response object is not null prior to attempting the redirection, and if it is not defined, perform a Server.Transfer instead.

What happens is that in most cases, the Redirect causes the browser to some generic "friendlyish" error page rather than the requested error page.

So then I tried using Server.Transfer exclusively, and this worked well for most cases, however, sometimes the transfer didn't seem to take in the browser. Changing it back to a redirect in these cases solved that problem, but reintroduced the issue where the errors previously being captured and transferred now were being redirected.

What I surmised from this is that in certain contexts where the Application_Error method is trapped, it is necessary to use Server.Transfer in redirection, whereas in others, it is necessary to use Response.Redirect. The question then became twofold: (a) When is one necessary and when is the other? and (b) What available information can I poll to tell me when a given condition exists.

After much searching, I cannot find a reasonable answer to this question. So I began to trap errors and examine the HttpContext object for some indicator. One thing that I was looking for is the reason why if even with a defined Response in the current context does a redirect fail. The only thing that stood out is that even though a Response object may exist, the Session data could be absent. I added the case to check whether the Session data was null and perform a Transfer in this case and it
seems to be handling it properly.

I emphasize "seems to be handling it properly" because no documentation I've been able to find confirms either the problem I am having or whether this is an appropriate strategy for solving it.

I guess the question is, am I on the right track here or is the null Session object just a red herring, indicative of nothing relevant. Here's the check I have set up for reference.

[Code]....

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State Management :: Storing Data Into Property?

Aug 28, 2010

I have written a property globally on page load i am storing setting some value into that property but on button click i am not able to retrieve the data. Is there any alternate way to save the data other than viewstate or sessionstate. Ex:

Partial Class _Default Inherits System.Web.UI.Page Private s As String Public Property Test() As String Get Return s End Get Set(ByVal value As String) s = value End Set End Property Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not IsPostBack Then s = "Test" End If End Sub Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click s = "Champ" End Sub Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click MsgBox(s.ToString()) End Sub End Class

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