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

Displaying a clickable playername
I am going wrong somewhere with the mysql_query, can someone please put me straight?

$playern

pagination - need help on passing of search query.
Hi, i have been trying for days but couldn't get this sorted out. Would like some professional help

curl javascript problem
Hi Experts.
I'm new curl and wanna to get some info from this http://www.amadeus.net/

when

problem with php mysql query
Hi guy's...

I'm totally lost here..because don't have any idea how to make a query for grab r

Changing color in GD via variable?
Hey guys, I'm new here. x)

I'm very much a noob when it comes to PHP, but I'm trying to learn

PHP Error
On my .php page I have a drop down box that has several names in it. When a user clicks the name &am

Frustrated php Newbie
First off, I am pretty much a PHP nub. I can read and understand the language (most of the time) so

close site for maintenance
i get a tutorial, saying the following code can put our site offline, and only the developer can vie

GET vs SUBMIT Button to show sections on one index.php page?
Just curious if one of these ways is better (i.e. more efficient) than the other.

I have a

Replacing a string on click of a button
Hi! Is there a way to replace a string on a click of a text link?

This is what I've come up w