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

what are '%S%', '%E%'
for example when i see Code: [Select]printf("Hello %srn", $name);
what does %s means

WHYISNT THIS MYSQL STATEMNT NOT WORKING? (php)
caps because its absolutely rediculous.
i dontunderstand why its not working. there is a column c

Using system() and bringing back the results
I am aware that you can use system() within PHP to execute system commands, but I was wondering if t

Java API in PHP?
I have an application that we use internally here at the office.

The software company provide

How to Detect it is public_html or httpdocs?
How to check whether it is cPanel or Plesk?

If it found public_html perform <?php incl

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

when

set xml path in flash when xml created in memorystream and webrequest
i am creating an xml file using memory stream and i want to load this xml file into the flash on cli

quick basic question, hopefully not dumb
I don't know how to search for this, so forgive me if it's been covered...

I often see an exa

PHP Upload issue
Hi guys,

I have stumble across an interesting issue with my script and is doing my head in.

Socket programming
Hello all,

I have a PHP socket script. GPS trackers connect to this socket. IMEI verification