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

Printer configuration
Hi All,
Suppose one of the user deleted the printer settings unfortunatly ,then what is the pro

php not working written for consumption of slots
1. Here is the function where i will be allowed to consume the slot booked by me.

2. Here i c

Word filter problem
Hello,

im trying to make a filter for words inputted in to my website but i want to store the

timed header image rotation
I have a joomla site and I was trying to setup a rotating image based on timing NOT just refreshing

Developing Ajax-enabled ASP.Net applications for the iPhone
I would like to develop Ajax web applications using Visual Studio that are optimized for the iPhone.

Passing JS to PHP
So I have the following
Code: <?php
getdetails(?><script type="text/

wav to mp3 + goDaddy
I need to convert wav files to mp3s. From what I have found so far one way to do it is to have my PH

Hits this week counter
I have a counter on my site that tracks hits, IP's, etc. into a mySQL database. It also includes the

Else statement screws up all css
Does anyone know what goes wrong in the process with this php code?
This code seems to be causing

Search with relational database
Hey,

I have quite a complicated (for me anyway ) relational database for an apartments syste