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

Form a inline view based on the results of the previous query?
Hi Experts,
Can we form a inline view on the results of a previous query (another inline view)?

Problem with "dynamic" index page
Hi. I have one question. In my index.php page I have this kind of code:
Code: // listaa sivut

Big Problem!! Please help
Hi Guys,

Im making a website for a friend have encountered a really annoying problem. When ev

Generate PDF
Hi guys,

I would like to know if there is a way to generate pdf when clicking on a link. In f

Javascript form submit and radio buttons?
When this form is submitted, it is automatically resubmitted using JS.

All my fields are carr

type check while uploading
Hi Everyone,

How can I check the exact type of a file while uploading on my site?

Here

Unifying logins of two different scripts
I have two different game scripts which I want to embed on my own site. The problem is I don't want

Need Help with a query
Hello,
For some reason I am just not getting the right answer when I do this query and not quite

I need help on this PHP code
Hi everybody, I made some kind of mistake while editing the code below. As you see, at the 3 row my

problem in program for counting no of chars using pointers
Hi all, I was trying to make a program which counts number of chars in a string using concpt of poin