AJAX: Unknown server tag 'asp:ScriptManager'.

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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 Print

Comments

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Keith Rull; 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.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Steve K; 6/8/2007 3:17 AM; perfect! worked like a charm

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: A. J.; 7/27/2007 9:15 PM; Hello there

How did you rename the tagpreffix ??

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Public; 10/28/2007 4:50 PM; What is PublicKeyToken?

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Alex Bransky; 10/29/2007 4:19 AM; http://msdn2.microsoft.com/en-us/library/system.reflection.assemblyname.getpublickeytoken.aspx

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Raj; 11/29/2007 10:33 PM; Could you please give step by step

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Nassero; 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.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: donoho; 4/2/2008 7:23 AM; Thanks for taking to time post the fruits of your labor... tasty.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: lakshmi; 4/16/2008 8:15 PM; thanks a lot!

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Omid; 5/7/2008 11:20 AM; Thanx! helped me much :)

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Larry; 6/12/2008 9:12 AM; Thanks, this fixed my problem

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Munish; 7/6/2008 11:54 PM; Good solution...worked for me... :)

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: helen; 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

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Joe; 8/29/2008 11:04 PM; Thanks buddy it solves my problem...!!

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Ed; 9/28/2008 10:57 PM; Thanks so much for this, sorted me out.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: dhanesh; 9/29/2008 2:09 AM; thanks.It works...

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Charu Agarwal; 10/14/2008 11:48 PM; thanks a lot for sharing. It saved me a lot of time.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: mahesh; 10/23/2008 1:38 AM; Thanks buddy. It was very useful.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: mighty; 11/3/2008 11:59 AM; me no saber

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: andyoye; 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

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Gaurav Shah; 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

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: itrickski; 11/20/2008 9:12 AM; THANK YOU for saving the rest of us hours and hours of searching. worked like a charm!

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: abhishek; 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

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: jsimhan; 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>

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: webdesign @ PK; 2/3/2009 7:26 PM; We had the same problem it worked like a charm!

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Gane; 2/5/2009 7:40 PM; Hi, Thanks man, its sorted out my problem

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: osman kasapoğlu; 2/18/2009 1:11 AM; adding AjaxControlToolkit.dll in your bin folder. build your project in .net framework 3.5 mode

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: priyanka; 2/25/2009 6:36 PM; thnks it really good.it is stret forward solution.i like this article

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Vito; 3/18/2009 2:40 AM; an unhealthy amount of time

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Ashandra Singh; 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.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: suri; 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>

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Raj; 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

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Anders; 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

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Marcel Bradea; 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!

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Kam; 7/9/2009 4:56 PM; Great tip, works in SharePoint as well.

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Dhivya; 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

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Tatoba; 8/5/2009 11:18 PM; Hi
Thanks a lot
Great script

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Gilda; 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>

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Esther; 9/16/2009 12:54 PM; Thank YOU! Works perfectly...would've taken me days to figure this one out myself

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Yeny; 9/19/2009 5:18 PM; Thank YOU!

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Omar Diaz; 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?

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: dev_interview; 10/12/2009 8:23 AM; Thanks. That saved me at least an hour...

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: Harish Vajja; 10/15/2009 11:28 AM; My heartly thnaks to you dude. you made my day.

# DAVETİYECİ: DAVETİYE; 10/30/2009 7:49 PM; güzel davetiye sözleri ve davetiye metinleri

# re: AJAX: Unknown server tag 'asp:ScriptManager'.: techincal_interview; 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.

# davetiye,davetiye sözleri: davetiyei; 11/18/2009 12:33 AM; düğün davetiyesi ve davetiye sözleri

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