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

Material xxx does not exist in plant xxx
Dear All,

I am working for a steel project which is repetitive manufacturing.

Need help in Generating Combinations
Need help generating all possible combination of names in an array

Lets say i have the follow

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

Dealing with code in db query
I am dealing with C code and I need to make sure it is encoded some how to ensure its integrity and

login form can you find my error?
registrationform.php seems fine send data to registration.php
registration.php seems fine checks

How do I use ValidatorCallout extender in Login control?
Hi,I'd like to customize the look and feel of the login control a little bit. One thing I'd love to

rename the file
File.txt

Code: ***DOCUMENT***
..DN:
000044255
..CB:
..SN:
..PY:
2009
..E

Select Lists into MYSQL
Hello All, I am new to PHP @ 1 week. So borrowing code anywhere I can. I am making progress, but h

How to calculate days from variable date?
This will be easy for one of you gurus. I want to fetch the date from a variable date, for example:<

shoping cart issues
i´ve wrote this and works when i add an item to, my cart, but when i want to add othrer item just