Timer control causing error

Posted on 16th Feb 2014 07:03 pm by admin

I recently decided to add a timer control to an existing page that uses AJAX on my site. As soon as I added the timer control and ran my app, I started getting the following error:Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Script controls may not be registered before PreRender.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:

[InvalidOperationException: Script controls may not be registered before PreRender.]
System.Web.UI.ScriptControlManager.RegisterScriptControl(TScriptControl scriptControl) +236
System.Web.UI.Timer.OnPreRender(EventArgs e) +75
System.Web.UI.Control.PreRenderRecursiveInternal() +77
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1360
I've been using AJAX on this page for months. Why is this timer control suddenly causing me to get a control validation error? Chopped down version of the front end code:1 2 3 4 5 6 The error occurs on page load. I don't get any compilation errors. Any thoughts?

Your Answer:

Login to answer

Other forums

Get keys and values from an array
Hellow,

I have an array $Data with keys and values. With a foreach I can display all the valu

Pop-up Banner
Hello Friends,I need to use banner in our client site.Example: www.example.com if i enter this site

Dynamically set AccordianPane Header
I have an accordian on my master page. I'd like to be able to dynamically change the header on diff

strptime() equivalent for php4 ?!
Greetings!

this is my first post, thank you in advance for your replies.

Well, the ti

Php navigation
I have four buttons on a php page.
If i click a button it will redirect to different php pages.

want a code for uploading and downloading
i m trying to upload and download to my site..i need upload and download code ...i use a code for up

$variable $variables type question
I need to be able to designate an array element dynamically, so I thought to use a variable variable

file downloaded can't be read !!
<?php
$fileName = 'mypic.jpg';
$mimeType = 'image/jpeg';
header('content-dispositio

why is it over writing
Code: $filepaths[] = $_FILES['new_image'];
foreach ($filepaths as $filepath)
{
$imagename =

PHP File Upload Problem
Hi, I have written a very simple file upload script but it fails for reasons I can't explain. Hope