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

Creating an invoice
Using fpdf I am trying to create an invoice to send to clients. The products are sold in pricing tie

WS-Security PL/SQL Forms
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - Prod
PL/SQL Release 10.2.0.2.0 - P

How can you detect variable string in a massive string?
Ok guys, i need some help with this one.

I am going to be getting a large string, like 10-20

Table trouble
i have been reading the forum for a few weeks and decided to join. i like the format and the advice

Need help: how to catch acess of undefined class properties
Hello. I am learning OO with PHP and have hit a problem.
Some code runs as perfectly valid code,

pspell
using pspell, is it possible to get words that would be best in the current phrase?

For examp

InternetOpenUrl() Invalid cert
Hi all,

Does anyone know how to prevent calls to InternetOpenUrl() from failing with erro

Logic question
im wondering what's the best method to do the above list:

it is for alliance @ MMORPG game

Add_Months not Easy to Understand
Oracle is number 1, very fast and very easy. But....
OK, I think but have a problem, only 1 pro

Adding post count
How would I make it so everytime someone clicks submit on my form, their row in the database for the