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<< Andrew Cohen is fired... | Home | SQL Profiler bug >>

AJAX: Unknown server tag 'asp:ScriptManager'.



I just spent an unhealthy amount of time trying to figure out this error:

Unknown server tag 'asp:ScriptManager'.

I was baffled because I already had a reference to AjaxControlToolkit.dll in my project, and I had what I thought was a web.config ready to handle any AJAX requests.  It turned out adding the section below to system.web fixed the problem.

 <pages>

      <controls>

               <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />

      </controls>

  </pages>

Posted On Wednesday, May 16, 2007 11:54 AM
Filed Under [ all tech stuff C# ]

Comments

Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Keith Rull on 5/16/2007 10:14 PM
I usually rename the tagpreffix to something like aspajax whenever i start an ASP.NET Ajax project because the VS.NET IDE gets clunky all the time whenever it can't find the control in the default asp namespace.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Steve K on 6/8/2007 3:17 AM
perfect! worked like a charm
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by A. J. on 7/27/2007 9:15 PM
Hello there

How did you rename the tagpreffix ??
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Public on 10/28/2007 4:50 PM
What is PublicKeyToken?
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Alex Bransky on 10/29/2007 4:19 AM
http://msdn2.microsoft.com/en-us/library/system.reflection.assemblyname.getpublickeytoken.aspx
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Raj on 11/29/2007 10:33 PM
Could you please give step by step
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Nassero on 2/17/2008 12:30 PM
1) Create a web.config for your app.
2) add the <Pages>...</Pages> given in the frist post above to <System.Web> element in the web.config.
something like this:
.....
<System.Web>
.........
.........
<pages>

<controls>

<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />

</controls>

</pages>
</System.Web>

Hope this helps.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by donoho on 4/2/2008 7:23 AM
Thanks for taking to time post the fruits of your labor... tasty.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by lakshmi on 4/16/2008 8:15 PM
thanks a lot!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Omid on 5/7/2008 11:20 AM
Thanx! helped me much :)
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Larry on 6/12/2008 9:12 AM
Thanks, this fixed my problem
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Munish on 7/6/2008 11:54 PM
Good solution...worked for me... :)
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by helen on 7/23/2008 11:50 PM
Hi i have done all the above but yet my error ( Unknown server tag 'asp:ScriptManager'.) is found any one help me please
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Joe on 8/29/2008 11:04 PM
Thanks buddy it solves my problem...!!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Ed on 9/28/2008 10:57 PM
Thanks so much for this, sorted me out.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by dhanesh on 9/29/2008 2:09 AM
thanks.It works...
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Charu Agarwal on 10/14/2008 11:48 PM
thanks a lot for sharing. It saved me a lot of time.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by mahesh on 10/23/2008 1:38 AM
Thanks buddy. It was very useful.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by mighty on 11/3/2008 11:59 AM
me no saber
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by andyoye on 11/6/2008 1:38 AM
I don't see <pages> in my web.config. I do see

There is only one entry or "pages" found in my web.config file

<pages enableSessionState="false" enableViewState="true" enableViewStateMac="true" validateRequest="false" .............
</pages>
is this where I add the post lines?

Thanks
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Gaurav Shah on 11/17/2008 5:11 PM
i have already register and make tag prefix stil error comming.
pls give me solutin quick.

here i describe my register tag code
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

in advance thank you
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by itrickski on 11/20/2008 9:12 AM
THANK YOU for saving the rest of us hours and hours of searching. worked like a charm!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by abhishek on 12/14/2008 6:40 PM
I added <pages> in my web.config. It worked!!!

But i m getting follwing error in Mozilla Firefox

Error: uncaught exception: [Exception... "An invalid or illegal string was specified" code: "12" nsresult: "0x8053000c (NS_ERROR_DOM_SYNTAX_ERR)" location:

Plz help.....

thanks in advance ....Alex
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by jsimhan on 1/5/2009 4:36 AM
Thanks a lot. After seeing the reference here I could fix the problem.

If you have the default "cc1" as your prefix after including ajax toolkit, the web.config file should have entry as follows if you include webservice references.



<pages>
<controls>
<add tagPrefix="cc1" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</controls>
</pages>
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by webdesign @ PK on 2/3/2009 7:26 PM
We had the same problem it worked like a charm!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Gane on 2/5/2009 7:40 PM
Hi, Thanks man, its sorted out my problem
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by osman kasapoğlu on 2/18/2009 1:11 AM
adding AjaxControlToolkit.dll in your bin folder. build your project in .net framework 3.5 mode
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by priyanka on 2/25/2009 6:36 PM
thnks it really good.it is stret forward solution.i like this article
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Vito on 3/18/2009 2:40 AM
an unhealthy amount of time
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Ashandra Singh on 4/5/2009 10:52 AM
<pages>
<controls>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</controls>
</pages>

Add the above lines to your web config inside the <system.web> root element.

Basically it loads the approriate assemblies.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by suri on 5/5/2009 12:11 AM
the solution is

with in this tag

add this assembly code.

<pages>

<controls>

<add tagPrefix="nw" namespace="ErrorPopup" assembly="ErrorPopup"/>

</controls>

</pages>
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Raj on 5/20/2009 6:19 PM
My huge thanks to "Nassero"

ur code snippet solved my issue in rectifying the error message of scriptmanager.

Thanks a lot.

grt work by you.

bye
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Anders on 6/5/2009 6:32 AM
Hi, thanks, thoough I had to struggle with the web.config this helped me to another step further.
No I'm banging my head towards how to set the permissions correctly, but that is another thread I think.
/a
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Marcel Bradea on 7/8/2009 11:39 AM
For my generated Silverlight web site project there was no web.config, so it took a simple addition of a Web Configuration Item for this to work. These lines were added in automatically from that template.

Cheers!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Kam on 7/9/2009 4:56 PM
Great tip, works in SharePoint as well.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Dhivya on 7/27/2009 12:37 AM
Hi,
thanks a million...
I had this issue for the last 2 days and have screwed up..
this solution helped me lot..
once again thank you so much
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Tatoba on 8/5/2009 11:18 PM
Hi
Thanks a lot
Great script
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Gilda on 8/18/2009 9:02 PM
It works perfectly. Nowadays you could need to change the tag in:
<pages>
<controls>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
</controls>
</pages>
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Esther on 9/16/2009 12:54 PM
Thank YOU! Works perfectly...would've taken me days to figure this one out myself
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Yeny on 9/19/2009 5:18 PM
Thank YOU!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Omar Diaz on 10/5/2009 11:57 AM
I didn't get it to work, and I'm guessing that it's because I have the ajax 2005 version, I think the version pair-name its the problem... what do you think?
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by dev_interview on 10/12/2009 8:23 AM
Thanks. That saved me at least an hour...
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Harish Vajja on 10/15/2009 11:28 AM
My heartly thnaks to you dude. you made my day.
Gravatar # DAVETİYECİ
Posted by DAVETİYE on 10/30/2009 7:49 PM
güzel davetiye sözleri ve davetiye metinleri
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by techincal_interview on 11/1/2009 4:26 PM
This fixed the problem on my machine. But, the interesting thing is the same code works fine on another machine which does not have the section you mentioned above.
Gravatar # davetiye,davetiye sözleri
Posted by davetiyei on 11/18/2009 12:33 AM
düğün davetiyesi ve davetiye sözleri
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by goldengel on 11/24/2009 1:41 AM
Hi. I can not use the web.config file. Is there any possibility to make the same declaration in the main ASPX page?
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Mihir on 12/9/2009 5:16 PM
Still its giving error... I have checked in add reference ... there is no any sysetm.web.extension library ... what to do? pls help
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by burhan on 2/14/2010 8:34 PM
thanks dude, u saved me :)
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by AlB on 3/19/2010 7:41 AM
Go to www.sevensimplemachines.com if you want to contract developers for more expert solutions such as the one above.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Joe Blow on 3/21/2010 6:10 PM
this error can also be fixed by installing (or reinstalling) the ASPAJAXExtSetup.msi package. (MS ASP.NET 2.0 AJAX extenstions 1.0)
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by HaterTot on 3/22/2010 1:21 PM
holy crap dude. You've saved me so much time and headache on my very first deployment of an asp.net app on a shared webserver
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Pradheepkumar on 5/21/2010 11:21 PM
Thank you very much. it's working
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Amit A Vimal on 5/24/2010 6:34 AM
Thanks alot
it really helped alot
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Gauree on 6/1/2010 11:55 PM
asp:scriptmanager instance is not present. for timer control it requires scriptmanager. what should i do??
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by faheem on 10/10/2010 8:10 PM
it worked man (Y) thanks
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by utkarsh on 10/22/2010 7:34 PM
thanx...it really worked...:)
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Ash Robbins on 10/26/2010 3:52 AM
Thank you so much for this! I've been pulling my hair out all bloody day over this problem! Brilliant!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by WLBlakeshaw on 10/27/2010 9:06 AM
I was also having this happen in VS2010. I created a brand-new empty ASP.NET web site and had warnings for all of my AJAX controls (such as “Element ‘ScriptManager’ is not a known element. This can occur if there is a compilation error in the Web site”). Adding the code above to my web.config file corrected that. The weird thing was, I could still load the page and all the AJAX stuff worked. It just mainly came down to lack of Intellisense.

WL
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Ashish on 10/31/2010 4:41 AM
I am not able to add ScriptManager control in C# 2008.
Error: Error creating control ScriptManager1
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Shilpa on 11/2/2010 6:03 PM
Thank You!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Website laten maken on 12/3/2010 2:27 AM
Thank you for sharing this, it solved my problem!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Isha on 1/11/2011 6:47 PM
it worked! thanks!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by erd on 1/18/2011 3:48 AM
Its all about the trust level if i understand correct its easy to solve with this solution.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Rosch on 2/10/2011 12:51 AM
Works perfectly. Thanks a lot!
Gravatar # Parser Error Message: Unknown server tag 'asp:ScriptManager'.
Posted by Vincent on 4/5/2011 11:04 PM
i am getting Parser Error Message: Unknown server tag 'asp:ScriptManager' when site is hosted.But it is working perfectly in localhost.

i added the above code and added dll's in the bin folder.still the same error is showing up.somebody Please help
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Je on 5/1/2011 7:14 PM
thanks a lot
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Je on 5/1/2011 7:14 PM
thanks a lot dude
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Orcy on 6/1/2011 11:18 PM
thank you it was of great help
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by 7 inch lcd monitor on 7/7/2011 8:19 AM
We have had this error with one of our webshops, we spend a lot of time to solve and we just got it again. This was a great help. Thanks
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by showme on 8/27/2011 7:30 AM
This solved my problem ..great tip ..wonder why vs2010 doesnt include this in the config by default
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by AF on 9/14/2011 1:32 AM
Worked for me too!
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Maestrodabla on 9/23/2011 7:19 AM
It works very well. You make me save so much time.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by bhagirathi on 10/10/2011 11:41 PM
Thanks it solved my problem
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Website laten maken on 10/12/2011 3:43 AM
Nice blog. Please keep posting and i'll will keep visiting this blog very often.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
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Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Ahmed Ali on 10/24/2011 2:06 AM
I do all the steps as follow:


but another error occured,
the new error is:
"
Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified


Source Error:


[No relevant source lines]


Source File: none Line: 0


"
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Shelby on 3/28/2012 12:37 AM
As a novice that cannot reach my web designer, can someone guide me through the process to get my default index page back up and running. I get the message above when trying to access the site. If someone will furnish me a contact number I will call them.
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Bhumika on 8/2/2012 9:45 PM
Thanks so much...
Gravatar # re: AJAX: Unknown server tag 'asp:ScriptManager'.
Posted by Carlos on 9/11/2012 12:36 AM
Thanks, solved my problem. But would you mind explain how did you get to this solution? I got curious.
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