Solved

why do my Control IDs suddenly reference "_ctl0" in ASP.NET?

Posted on 2009-07-04
4
1,299 Views
Last Modified: 2013-11-18
Hello All,

I have a web application in ASP.NET that uses a master page as a template.

Everything works fine in our development environment, but when we deploy the application to the production environment all of the control IDs change:

For example, this on development:
<input name="ctl00$cphMainContent$txtSomeTextbox" type="text" id="ctl00_cphMainContent_txtSomeTextbox" />

Becomes this on release:
<input name="_ctl0:cphMainContent:txtSomeTextbox" type="text" id="_ctl0_cphMainContent_txtSomeTextbox" />

The application uses javascript on numerous pages to access elements via the 'getDocumentById' function, so having the IDs changes in the source like this is buggering things up quite a bit.  The server is configured the same for .NET for both environments.

Has anyone else also seen this behavior?  What is cause and how do I go about fixing it so that the IDs do not change in the source?

Many thanks,

pvirk
0
Comment
Question by:SGIC2008
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 4

Expert Comment

by:nasserd
ID: 24778318
ASP.NET Web Controls have this known "translation" of ControlID's between WYSIWYG and deployed states.  It is an intentional and well documented behavior.

HTML Web Controls, however, do not change their ControlID's between edit and published views.
0
 
LVL 10

Expert Comment

by:Espavo
ID: 24779026
This is "standard" behavior of ASP.Net...
You can use txtSome.ClienID to get the "Server Control ID at RunTime" and you can then pass that info to your JavaScript...
Here's an example of how I use it:
KeywordTB.Attributes.Add("onKeyPress", "doClick('" + KwdSrchBtn.ClientID + "')")
0
 
LVL 2

Accepted Solution

by:
nikege earned 500 total points
ID: 24780739
Check web.confing on both servers.It seems one of them contains

<xhtmlConformance mode="Legacy"/>

Look at this article http://weblogs.asp.net/scottgu/archive/2006/12/10/gotcha-don-t-use-xhtmlconformance-mode-legacy-with-asp-net-ajax.aspx.
 here is the result of using and not using Legacy

With legacy, this is the emitted html:

           <input id="_ctl0__ctl0_eDefaultStore_0" type="radio" name="_ctl0:_ctl0:eDefaultStore" value="1" />

Without legacy:

           <input id="ctl00_ctl00_eDefaultStore_0" type="radio" name="ctl00$ctl00$eDefaultStore" value="1" />
0
 

Author Closing Comment

by:SGIC2008
ID: 31599829
Thanks this was exactly what the problem was.  The root web.config had this set to legacy and this was inherited by our application that was in a sub folder.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Today is the age of broadband.  More and more people are going this route determined to experience the web and it’s multitude of services as quickly and painlessly as possible. Coupled with the move to broadband, people are experiencing the web via …
Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
The purpose of this video is to demonstrate how to set up the WordPress backend so that each page automatically generates a Mailchimp signup form in the sidebar. This will be demonstrated using a Windows 8 PC. Tools Used are Photoshop, Awesome…

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question