Web Forms :: Server Side Code <%= Firing Before PreRender Event?

Jun 7, 2010

I am running some custom code in a user control using the <%=Code%> tag. The problem is that the code seems to run before the PreRender event. Is there any way for met to get this code to run after the PreRender event?

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Aug 27, 2010

I have created dynamic control with both server and client side events.. if i set client side event server side event is not firing.. I have created the link button which will validate and do some necessary actions.. Validation is working but click event of link button is not firing .. if we remove the client side event , server side event is firing.. how to avoid this.. I want both events..

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Web Forms :: How To Stop Body Onload= Event From Firing When User Clicks Server Side Button

Nov 1, 2010

how to stop body onload= event from firing when user clicks server side button .

this is my below code in client side


when i clicks server side button it raises body onload function again?

I want to raise this body onload function only when page load not in server side button click.

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Button Click Event Still Firing Even Through Custom Server-side Validation Fails?

May 27, 2010

I am having a problem where my button click event is still firing even though my custom server-side validation is set to args.IsValid = false. I am debugging through the code and the validation is definitely being fired before the button click, and args.IsValid is definitely being set to false once the custom validation takes place, but it always makes its way to the button click event afterwards.

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How To Call Client-Side Code Before Server-Side Event

Jun 28, 2010

<asp:RadioButtonList ID="rbEmployeeGroup" runat="server" RepeatDirection="Horizontal"
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Web Forms :: Can Execute Server Side Button Event After Executing Javascript Code

Mar 10, 2010

I have buttion on web page and client side java script ConfirmResetPassword() for confirmation message which return true or false

if (confirm("Are you sure you want to reset password of this user?")) {
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return false;
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<input type="button" name="ctl00$ContentPlaceHolder1$btnResetPassword" value="Reset Password" onclick="javascript:return ConfirmResetPassword();__doPostBack('ctl00$ContentPlaceHolder1$btnResetPassword','')" id="ctl00_ContentPlaceHolder1_btnResetPassword"
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Web Forms :: How To Fire Server Side Event After Client Side Event Is Triggered

Sep 12, 2012

I have a scenario where i have 4 asp buttons , on click of each button there are 4 labels inside 4 seperate divs where each displays seperate data.

Now if i click second button i need to display second label text inside 2nd div and hide all other divs.How can i achieve this ?

 OnClientClick event of each button calls displayAlternate() which displays repective div and hides other.

displayAlternate('second'); return false; --> if i do this server side event is not fired ...

If I return true div second label is not getting displayed..

How can I achieve functionality where all divs expect 2nd is hidden and i get server side event also..

Below is code.

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<form id="form1" runat="server">
<script type="text/javascript">
function displayAlternate(id) {

[Code] .....

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GridView PreRender Not Firing After RowDeleted?

Dec 21, 2010

When deleting a GridView row in the UI (via a LinkButton whose CommandName="Delete"), the view does not automatically refresh and continues to display the deleted row until I take some other action (manually refresh page, navigate away and back again, etc).

In the debugger, I see the row is successfully deleted, and both the RowDeleting and RowDeleted events fire, but the GridView's PreRender event does not fire afterwards (in contrast, that PreRender event does fire when first loading the page, when adding a new row, etc).

I've used GridViews in similar configurations without having this problem, but I don't see obvious differences. It seems the process is aborting before the PreRender event, but no exceptions are being thrown, and stepping off the end of the RowDeleted event in the debugger brings me back to the UI as though the process were completing normally.

where I should look for the trouble or a solution? Other possibly-relevant details: the GridView is bound to a SqlDataSource; the data source does not declare any DeleteCommand; I handle the deletion by calling a stored procedure in the RowCommand handler, after which I rebind the GridView with DataBind(), at which point I can see the GridView's Rows.Count has decreased by one as I'd expect. Everything seems fine through the RowDeleted event, then... nothing!

UPDATE: tried calling the SP to delete in the RowDeleting handler rather than RowCommand handler... made no difference. The row is still deleted but processing terminates without calling the GridView's PreRender, and the deleted row is left on display until some further UI interaction updates the view.

UPDATE2: I'm not even getting the Page's PreRender event, which precedes the control PreRender events. Will continue working backwards to see if I can find where things are halting, since stepping out of the RowDeleted event seems to be the end of the line...

UPDATE3: I've been poking around some more and, although it complicates my code, I was able to get things working by declaring a DeleteCommand in the GridView's SqlDataSource that just does the simple row (record) deletion, and then in the RowDeleted handler calling the additional stuff I had in my stored procedure that needs to happen along with the primary deletion. While it's less convenient having the primary deletion in one place and the related processing in another, at least it's working.

But I don't know what to conclude from this: that a DeleteCommand is needed for proper page life cycle? that one shouldn't do a deletion in a stored procedure in the RowCommand handler? something else? I wish I could identify what, specifically, is broken about my initial attempt...

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Event Handlers Not Firing When Client Side Change Occurred In List Box

Apr 27, 2010

I have two list boxes and I am using javascript to interchange the items. My problem is, When I press submit button before any changes in the listboxes, it would fire the eventhandler. But when I made any change in these listboxes, a postback happened and the controls became invisible. (There is an html tag and an empty body tag in the source). I know listbox cannot preserve the client side changes to the server. But I could not identify the problem.

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Web Forms :: How Do You Write To A Client-side Control (text Box) With Server-side Code

Jan 6, 2010

If I have a standard HTML textbox


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Web Forms :: Event Handling In PreRender Vs Page_Load?

Jun 29, 2010

I have a GridView, here I am adding the LinkButtons at runtime to the GridView cells. I am also attacing an click event on these LinkButtons.

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private void Page_PreRender(object sender, System.EventArgs e)
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Mar 7, 2010

I have a DetailsView on my page, bounded throught ObjectDS (but I think it's not important). Some field is readonly for some users - based on role membership and other paramaters. I've tried to use the PreRender event to manage these field's readonly state. Everything is working - except one template field: when I click first time on Edit button the dropdown list stay readonly independently the role membership. When I click on Cancel than Edit again the control state is good. Code of PreRender event handler:


Environment:Web Developer 2008 Express .NET Fw. 3.5 Windows XP

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I Getting A Problem In DataGrid's ItemDataBound Event. I Am Calling A JavaScript Function In DataGrid's ItemDataBound Which Retrun The CellIndex And RowIndex Number On Which UserClick After That I Am Re-Binding The DataGrid With jQuery Function After That ItemDataBound Event Not Working. I Want To Call The Same Function Again. Is Their Any Method To Call A Server-Side Function On ItemDataBound Event Except Client-Side Function..

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May 18, 2010

I have a master page with a login box on it. Inside the login box is a button -


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May 18, 2010

in a form i have a buttoin, when click both OnclientClick and postback should happen. on clicking the "Email" button a client side "mailto" tag should do the work and pull a new message window on the client's machine.

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If I have a standard HTML textbox: I can retrieve the value using Request.Form. But how do I go about populating this textbox from the server-side? I tried Request.Form["txtTest"] = "blah"; but got a readonly error.

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I am trying to attach a server-side event to lookup the city/state for the user-entered zipcode in a field like the one below.

<asp:TextBox ID="TextZipcode" runat="server" CssClass="inputtext" Columns="10" MaxLength="10"></asp:TextBox>

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Web Forms :: Server Side Event For Anchor Tag?

Jul 7, 2010

I am working on asp.net 3.5.

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How To Put Code Into PreRender Such As Databinding

May 19, 2010

Would a call to a database be called if you put the databind method in the PreRender event of a listbox and the listbox was rendered on the screen for example? This is a specific example regarding a listbox, but basically does code in PreRender only get called if the control is rendered on the screen. If this is so, is it good practice to put code into PreRender such as databinding?

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Web Forms :: Event For Server Side Control Not Getting Fired?

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I have created some dynamic controls, at the runtime from server-side and I want to write the event-handler for those controls. All I did is :

// Defined the control as


// And I wrote the even handler as :

Private Sub addobjective(ByVal sender As Object, ByVal e As System.EventArgs)
End Sub

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Call Javascript Function From Code Behind After Server Side Code Executes

May 25, 2010

I have an asp.net button, that when clicked calls a code behind function. The function does some evaluation, and then I want to call javascript from within this asp.net function.

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Web Forms :: Why Does Server Side Hiddenfield Not Fire Oninit Event

Jan 19, 2011

I have a hidden control and i am adding oninit event from code behind on hidden control,but why does server side hiddenfield not fire oninit event?

<input type="hidden" runat="server" id="hidden" name="hiddenColConfigure"/>
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Web Forms :: Add Double Click Server Side Event To Listbox?

Feb 21, 2011

im tryign to add a double click event to an asp:listbox, i found a forum post on google that had the code below on it, but didnt explain how to use it. ive hazarded a guess but am still getting errors

the InitializeComponent method ive had to comment out as, im getting InitializeComponent does not exist in the current context and ive googled that its not needed for web forms?

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Web Forms :: Server Side Function For Keypress Event On List Box?

Feb 15, 2010

I have a list box as given below:


and i want to delete the selected items on pressing delete key.

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Web Forms :: Add Server Side Click Event Handler To Table

May 7, 2015

How can i add a click event to my entire table (not row or cell) that will trigger a server side method and not a JS method.I know i can add attribute which calls JS and then add post back as follows:

 table.Attributes.Add("onClick", "return jsFunction(" + 111 + ");");

But, i want to trigger a server side method.

I'm looking for something like we do when adding a clickable event to a control, for example...

lable.Click += new EventHandler(onLabelClick);

And then add

private void onLableClick(object sender, EventArgs e) {//... }

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