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

Header is not working in IE
Hi ! header function is not working in IE but it works in FF, Safari, Chrome. any help please. :

Change Age automatically
hi guys . im new to php , is it possible to change age value in mysql automatically when year change

TCP Sending Unsigned Char...
Hi...

I want to send over tcp/ip some data, i have the data in hexadecimal, and when i tr

GET * FROM _____ Except?
I have a site that is for stock photography.

This section of the code calls images to display

Remove Rows From Database ad
Hi All,

I have this:

Code: [Select]<?php
session_start();
include('../com

selection tool on raster image
Hi!
I have to implement in my app a selection tool which lets users to select region of any shape

Which PHP-Editor do you think is the best?
Hi everyone,
Myself Brian Anderson. For the last 2 years i have been working a

MS Access data into a html table
Hi everyone, I am quite a novice at php but I have created some helpful scripts that fetch data
f

Echo Tweaking help!
HI. I would like to have the output of the entered variables repeat forever, but it's stopping at th

Contents of variable not echoing
Hey guys, hopefully this is an easy one...

In this line, the variables are not echoing out. T