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

Values disappear from my array :( HELP!
hey all, I have a lil mysql/php/apache script that queries a database
and pulls put 5 integers.

gather checkbox data from form into email
Hello all,

First, i'd like to thank everyone who responded to my previous posts regarding set

Check premium expire
Hi,

I am making a simple file hosting site and want to check if users premium subscriptions h

Help with form post data and arrays
Hi all,

I am new to this forum... It has been awhile since i have worked with arrays, and i a

path to include folder
Hi everyone,

When I'm testing locally, I have to add the name of the site folder as part of t

how to load php class from another domain?
how to load php class from another domain?

Why do I get this error?
Error:

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or

Require select-option functionality in Module Pool Programming
Hi Gurus,

I am doing a development by Module Pool on Warehouse Management. For that devel

Undefined offset when using a flat file with pipe symbols
Hi, I've got a flat file/text file which I'm currently using as a member database for my site (not a

PHP Cannot redeclare class
I have 6 files, and two of them do not seem to want to play well. I keep getting a "Cannot rede