Web Forms :: Pass Value To Page_Init On Postback?

Jul 28, 2010 05:48 AM

I have a gridview control with some linkbuttons in.

When the linkbutton is pressed, i want the ID value attached to it, to be usually in the Page_Init where i need to create some dynamic controls, based on this ID.

But since the linkbutton's click event, is fired AFTER the Page_Init, this is a little hard for me to do.

How would i go about doing this, if it is even possible?

The reason behind, is that the linkbutton refers to a calendar event. Once clicked, it will list the details, but it will also list any comments, users have submitted about it. The dynamic controls i need to create, are delete buttons for the comments, so an admin can remove offensive comments.

All done on a single aspx page, with updatepanels (visible toggles, and populating labels). I would like to avoid sending users to another page, with a horrible ?id=6 link.


C# - On Postback, How To Check Which Control Cause Postback In Page_Init Event?

Jul 4 10 at 17:14

On postback, how can I check which control cause postback in Page_Init event.

protected void Page_Init(object sender, EventArgs e)
//need to check here which control cause postback?

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Web Forms :: Page_Init Firing On Each Postback?

Sep 23, 2010 03:36 AM

I am having a problem with web pages in a .Net site where the Page_Init is firing on each postback rather than the normal behavior (Page_Init fired initially, and only Page_Load fired on postbacks)

Several comments:

1. AutoEventWireup is set to false on all pages, with a "Handles Me.Init" set on Page_Init. All events are defined with the "Handles" verb as shown below

2. Each web page is subclassed to a parent class which provides strongly-typed access to the contents of session variables.

3. The Page_Load event for most of the pages performs a DataBind operation on a gridview control.

Partial Public Class SamplePage
Inherits PageManager (PageManager inherits from System.Web.UI.Page)
Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
End Sub

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Getting Control That Fired Postback In Page_init?

Mar 19 10 at 17:09

I have a gridview that includes dynamically created dropdownlist. When changing the dropdown values and doing a mass update on the grid (btnUpdate.click), I have to create the controls in the page init so they will be available to the viewstate. However, I have several other buttons that also cause a postback and I don't want to create the controls in the page init, but rather later in the button click events.

How can I tell which control fired the postback while in page_init? __EVENTTARGET = "" and request.params("btnUpdate") is nothing

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

Apr 09, 2010 08:35 PM

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.,

Session[pageInstanceID + "ThekeyIWantAccessTo"] = "123";
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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During Asynchronous Postback (Ajax) Will Page_PreInt() ,Page_Init(),Page_Load() Events Fire Again?

Mar 30 10 at 14:43

During Asynchronous postback (Ajax) will Page_PreInt() ,Page_Init(),Page_Load() events fire again?

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Web Forms :: How To Pass Selected Value Of DropdownList To A User Control On Postback

Feb 25, 2010 09:02 AM

I need to create a user control which will be loaded according to the selected value of a dropdownlist. The Dropdownlist is not the part of Control. I want to pass the value of selected value of dropdonwlist to my user control and the user control will load according to the Value. For not postback it work fine. But when the page is postback, that is when i select a item form dorpdownlist, the user control is not loaded.

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Web Forms :: Usercontrols Value On Page_init?

Sep 21, 2010 10:10 AM

In one of my pages I use an usercontrol. The usercontrol has a textbox and a button on it. When someone adds text to the usercontrols textbox, I want to use the entered text in my page_init event. The problem is that in the page_init event, the textbox value is empty. How can I use the entered text in the page_init event?

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Web Forms :: Cannot Set Cookie In Page_Init

Jun 11, 2010 04:33 PM

My code here:


When it runs, it successfully create a cookie thisVisit with today date as value.

However, when I reload the page, the cookie thisVisit becomes null.

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Web Forms :: Page_Init Is Not Being Fired?

Oct 28, 2010 09:06 AM

I am using a baspage class for my session checking by the following code


My rest of the pages are being inherited from above basepage class. but the problem is that all the pages inherited from basepage class are not firing the event Page_Init...?

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MVC :: Equivalent Of Page_Init In Web Forms?

Nov 20, 2009 01:53 PM

I have an ASP.NET MVC web app setup and I need to know what the equivalent of page_init is for ASP.NET? I need to set the application to not cache anywhere. Is the global.asax the best place for this? If so, which event?

Basically, I need to put it so that everytime there is a postback, that event must be called. I am trying to turn off caching at all levels as this is a blackberry mobile app.

Code to add:


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Web Forms :: Page_init And Page_load Fired Twice?

Jun 13, 2010 08:38 PM

i was debugging a test page when i noticed that its init and load event handlers are being called twice.

i found out by search that this may arise due to some html tags which im not using in my page,

also some line:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load,Me.Load

may cause this problem.

i use c# in the code behind aspx, if such line is the problem, in which file should i look for?

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C# - How To Pass An Array Of Structures Through Postback

Mar 23 at 19:35

I have the following structure:

private struct S_indiv
public int[] x;
public int s;
public S_indiv(int[] p1, int p2)
x = p1;
s = p2;
and array:
private static S_indiv[] ind;

How can I pass this array through Postback?

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C# - Pass Form Variables On To Second Postback?

Jan 20 at 16:35

Is it possible to postback to the server, perform a function, and then continue that postback on to an external place? (ie, to a payment system)(the scenario is clicking a button to place an order, mark it as sent, then send them off to the payment page (there are form variables that needs to be sent to the payment screen as well))

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Web Forms :: Page_init Called Twice / How To Find Its Reason

Jun 11, 2010 03:49 PM

I was working on something with Page_Init. I palce a break point and noticed the event is called twice. What happen was:

1) Page_Init is called

2) Page rendered on browser

3) Page_Init is called again

How do I find out what is casuing it to fire twice? Page_load is also firing twice and this is happening on IE.

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Web Forms :: Difference Between Page_Init() And Overriding Oninit()

Dec 31, 2010 04:32 AM

explain the diference between these Page_Init() and OnInit() events and when we should use which one?

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Web Forms :: HiddenField And Viewstate Not Accessible During Page_Init Method?

Nov 26, 2010 06:27 AM

I have a GridView and a TabControl. On click on the row of grid, I store the EmpId in a hiddenfield in javascript. Now in Page_Init, I am trying to load a usercontrol for a EmpId stored in hiddenfiled. But I am not able to access hiddenfield value in the Page_Init. It display empty. If I have to load the usercontrol during Page_Init, then I have to access the HiddenField value first and it is give problem.

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Web Forms :: Wizard.ActiveStepChanged Method Is Called Before The Page_Init?

Feb 01, 2010 09:20 PM

I'm debugging right now and it seems the Wizard.ActiveStepChanged method is called BEFORE the Page_Init method?!?

I've tried it several times now.

If thats the case: what is called BEFORE Wizard.ActiveStepChanged?

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Web Forms :: A Zone Can Only Be Added To The Page In Or Before The Page_Init Event?

Jan 12, 2010 11:41 PM

I m trying to load a new tab which should load WebUserControl2.ascx on button_clickbut I m coming across this eror: A Zone can only be added to the Page in or before the Page_Init event.I have a webpart in WebUserControl2.ascx which should load FeaturedControl.ascx.Well, i m getting the error when i click on button at :

Private Sub LoadTab2()
Dim uc2 As UserControl = CType(LoadControl("WebUserControl2.ascx"), UserControl)
tp2.HeaderText = "Tab2"
End Sub

Where, tc is tabcontainer, tp is tab panel.

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AJAX :: Pass Textfield Data To Code Behind Without Postback?

Dec 01, 2009 06:09 AM

I'm new to these techniques and I want to use user input for filtering purposes in a bunch of gridviews without doing postbacks.

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Web Forms :: Page_init Event Accessing Controls AM GETTING WRONG VALUES?

Oct 22, 2009 12:25 PM

I am a beginner in asp.net and have not understood the asp.net event life cycle properly. Can someone please tell me what is going wrong the following scenario and how to fix it.. I am changing a value in a javascript function of a hidden field.

The value that is changed is accessed in the page_init event is being accessed but wrong value is being obtained because it is the page_init event, I am getting the correct value at page load however.I guess this is because the loadviewstateevent has notfired to get the actual control's values. Is there any way I can actually get the correct valueLike shall I save the value in a querystring and then when postback happens I can access that in the page_init event?I guess I am looking for a mechanism to set something in a website on the default.aspx page in a js function and I can access the changed control before the load and save view state.

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Web Forms :: Retrieving Item Values From A Dynamically Populated CheckListBox During Page_Init

Jan 15, 2010 01:59 AM

i have a checklistbox that is databound during Page_Init in an

If (!Page.IsPostBack)

block. the user can then check off certain values, and click an asp.net button which posts back the form and renders a crystal report on the same page.

i need to be able to determine which items were checked in the control so that they can be used as parameters in the crystal report. rendering must be done during Page_Init.

the checklistbox object is on the page during design time; only the items are dynamic.

i tried using the Request.Form object during Page_Init to obtain the checkboxlist's items but either i didn't code it correctly or it can't be done that way...

can the checkboxlist items' values be obtained during Page_Init, and if so, how?

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Forms Data Controls :: Writing Event Handler For Nested Grid In Page_Init()?

Jul 19, 2010 07:27 AM

my nested Grid Rowupdating Event is not fired., so i want to declare event in code., how can i do this/


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ASMX Equivalent Of Page_Init?

Jun 29 10 at 20:56

I have some code I would like to execute very early in the lifecycle of a call to an ASMX function. For our ASPX pages, this code is in the Page_Init() function on a base class, from which all our ASPX pages inherit.

Is there an ASMX equivalent to the ASPX's Page_Init() function?

Better yet, is there an ASMX lifecycle diagram like the ASPX one? http://msdn.microsoft.com/en-us/library/ms178472.aspx

If there is an ASMX equivalent to Page_Init(), I assume I can implement code in a common base class, from which all my ASMX classes can inherit, correct?

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Setting Values That Can Only Be Obtained After Page_Init?

Oct 06, 2009 02:11 AM

My control needs to be populated in Page_Init...but the value in which I need to pass it comes from a combobox selectedindexchanged event...now I can set a session varable in the event handler and on next postback apply it to the control

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Cannot Modify Asp Login In Page_load Or Page_init

Mar 18 at 20:38

So I have an asp:Login field on my login page. However, I want to use a path for the create account url and the forgot password url. So I have to do it in Page_Load or maybe Page_Init. Regardless, neither option works, it simply refuses to modify the login form.

protected void Page_Load(object sender, EventArgs e)
string accountpath = Request.Url.AbsoluteUri + "/user/RequestAccount.aspx";
string forgotpath = Request.Url.AbsoluteUri + "/user/ForgotPassword.aspx";
lgnMain.CreateUserUrl = accountpath;
lgnMain.PasswordRecoveryUrl = forgotpath;
lgnMain.InstructionText = "test";
protected void Page_Init(object sender, EventArgs e)
string accountpath = Request.Url.AbsoluteUri + "/user/RequestAccount.aspx";
string forgotpath = Request.Url.AbsoluteUri + "/user/ForgotPassword.aspx";
lgnMain.CreateUserUrl = accountpath;
lgnMain.UserName = "test";
lgnMain.InstructionText = "test";
lgnMain.PasswordRecoveryUrl = forgotpath;

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HttpHandlers / Modules :: RewritePath In Page_Init?

Feb 07, 2009 07:03 PM

I dont know if this is the correct section to post this question, but i'll take a chance.My question is:

Is it possible to do a URLRewrite in a Page_Init or Page_Load or a similar method instead of making a HttpModule? It is used in a online shop and all product url's should be like "www.blah.com/products/[categoryName]/[typeName]/[productName]. My problem is, that my client want to get rid of all .aspx extensions in the URL's but uses a webhotel where he doesn't have access to the iis. My solution is to use the Microsoft URL Rewrite module for iis 7 which is installed on the server and then catch the correct URL's. The problem is, that in the url's will be titles of the different things, and I need the ID's in the page i am going to rewrite to. So I must have somekind of a page in between which finds these id's and rewrites. But the page i have made in between won't rewrite the url - just stays on the same place.

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Why Does Some Page Components Not Getting Fully Loaded In Page_Init

Jul 5 10 at 17:46

In page-init, view state and some other components don't get loaded. Which are they?

Why do they loaded in Page-Load only? What does the need of Page-Init then ?

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AJAX Timer Tick Fires Page_Init?

Apr 15, 2010 03:47 PM

I am currently working on an ASP.NET project, where I am using C# as my default language. I have an .aspx page, where I have an AJAX Script Manager and an AJAX timer. When that page first initializes, it does a pretty costly operation (parses a .csv file), which I only need to do once. However, every time the Timer tick takes place, Page_Init is fired again. Is there any way to correct it?

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C# - Should Add Control Event Handlers Programmatically Within Page_Init

Jan 10 10 at 22:10

I want to add event handlers programmatically to the server controls rather than using their predefined OnClick properties, etc. But which would be considered a better practice for defining handlers:

Define them in Page_Init
Define them in Page_Load

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Sep 08, 2009 02:35 AM

How do I get a reference to a asp:placeholder that is a child control of a repeater in the Page_Init event? I tried the code below, but it return object reference not set.


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Is Page_Init Method Needs Base.OnInit(e) Line ?

Feb 11, 2011 03:50 PM

there is PagE_Load code block.Its okay.but If I add Page_Init codeblock, shoud Oninit method is necessary ?

protected void Page_Init(object sender, EventArgs e){

if so why ? and what may be problem if I wont add this line ? because If I add or not everything seems working.

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How To Redirect On Page_Init And Stop Any Code From Processing

May 01, 2009 04:47 PM

I have a code on the page_Init event where I parse a querystring and populate a page with images, in the querystring I have an date, and I use this date to dertermine if that url has expired. If the page has expired, I would like to redirect to another page saying that I can't process the request because it has expired. What do I put in the page_init that would halt the loading and processing of the page and redirect it to another page?

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Page Lifecycle And Not Being Able To Display Controls Outside Of Page_init When Trying To Create Them Programatically?

Nov 28 10 at 13:59

I'm creating a page that users can upload a file to the webserver. After upload the page will then have a link to the file that has just been uploaded, along with any other files that have already been uploaded.As I am programatcially creating links to the files which have been uploaded, I have to do this in page_init or else the link button won't fire off it's event when clicked. MY web page does all this - it creates the link buttons and when I click on them, it calls the event method required i.e. a sub to download the file.

OK, the problem I've come accross is: when I click upload (to upload the file) - the page_init sub is called, displaying all the previously uploaded files as link buttons. Then my btnUpload_click sub is called, which uploads my current file. The only prob is the current file hasn't been displayed? I can only display links in the page_init, but because btnUpload is called after the page_init, the current file isn't uploaded until after page_init and therefore not dislayed?

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Create An Empty Page_Init Event Block For A Page Automatically ?

Feb 11, 2011 01:40 PM

When we double click to page It creates an empty Page_Load event codeblock automatically. Or you know can create other control's event subroutine events by clicking the relevant event in properties window.

but how can we create a Page_Init ? is there an automatic way ? or should we just write its name and parametes manually is the only way ?

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User Control - Page Event The Properties Will Be Initialized In Page_init() Or In Page_preinit()?

Nov 27 09

I have a user control with some properties. In which page event the properties will be initialized in page_init() or in page_preinit()?

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Nov 17, 2010 12:17 PM

On my page: a Button1, a ListView1, a Panel1 and inside Panel1 an ImageButton1In the ListView1_PreRender-Event the property Panel1.Visible = false or Panel1.Visible = true is set.1. After first loading of the Page Panel.Visible = false ist set in ListView1_PreRender.2. After the postback click on Button1 the criteria for the visibility of Panel1 are evaluated, thus setting in the ListView_PreRender Panel.Visible = true.

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Mar 10, 2011 04:12 PM

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Sep 21, 2009 04:17 PM

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If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. I`ve tried to set CausesValidation="False" Both controls are added dynamicaly so they do not know about other.

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Sep 22, 2010 06:24 PM

I'm at my wits end on this one looked/Searched/Played/Experimented and I need your help if you can.This page is going to be primarily used on a mobile device using Win Mobile 5 Need to Accomplish:Prevent Postback(serverside) of Page using JavaScript (Postback's slow down the page on mobile device)


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