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.
hello
i am getting this error in my application...i used ajax in web site..please help me
Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: 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:
Source File: C:\Inetpub\vhosts\hamaracar.com\httpdocs\web.config Line: 32
Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded.
Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832
siva
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siva4forum 
asp.net.config-deploy
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This error looks like your application is not finding the AJAX dll.
Is AJAX installed on the server?
Bruce
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Bruce Find the System.Web.Extensions.dll file and copy it over to the bin directory.
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ghinx Bruce L:
This error looks like your application is not finding the AJAX dll.
Is AJAX installed on the server?
To clarify, the ASP.NET 2.0 AJAX Extensions 1.0 needs to be installed on the machine. The Toolkit does not NEED to be installed on the webserver (as long as the AjaxControlToolkit.dll is there)
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bndo I'm getting the sam error but according to the MSI, Ajax IS installed on my machine...where do we find the dll ?
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GianniP Hi,
I think your problem is that you have Orcas installed, I noticed after I installed ocras every time I use visual studio 2005 with ajax it adds this line to the page
<%@ Register Assembly="System.Web.Extensions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
Namespace="System.Web.UI" TagPrefix="asp" %>
if you find this line delete it from your page, Notice the version number. but make sure you refernce the System.Web.Extensions in your config
<add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
Please try it and let us know if it fix your problem
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nawaf227 Make sure that the site resides in a virtual directory.
Secondly check what version asp.net you have setup for that site.
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GianniP I had the same error, and after reading the posts in this thread, the problem got solved. The problem was that the AJAX extensions were not on the server, so the file System.Web.Extensions was not on the server. I installed ASPAJAXExtSetup.msi, and the problem went away and I was able to build the application on the server. Even if your application has the AJAX dll’s in the bin, the AJAX extensions still need to be installed on the server.
I want to thank you gurus for solving my problem.
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psmithphil thanks a lot guys i was also facing the same problem ....
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ronnyrunatserver I was facing this exact problem on a new server. Once I installed AJAX as described above, all started working. Thanks very much!
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wolfedev I had the same error, and after reading the posts in this thread, the problem got solved. The problem was that the AJAX extensions were not on the server, so the file System.Web.Extensions was not on the server. I installed ASPAJAXExtSetup.msi, and the problem went away and I was able to build the application on the server. Even if your application has the AJAX dll’s in the bin, the AJAX extensions still need to be installed on the server.
I want to thank you gurus for solving my problem.
Thanks guies i had same problem and was very frustraited . but after installing above file it got solved......
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Akshata Find the System.Web.Extensions.dll file and copy it over to the bin directory.This Worked for me...Thanks Guys.-
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carlmaul Worked for me as well. Simply install
ASP.NET AJAX 1.0
http://www.microsoft.com/downloads/details.aspx?FamilyID=ca9d90fa-e8c9-42e3-aa19-08e2c027f5d6&displaylang=en
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Radoslav I am completely confused. I am getting this error as well. I work at a university where I have no control over the web server and cannot install anything on the web server. I can only install things on my office computer (which is networked). Do I have to contact the university web server administrator and ask him to install something on the web server? If that is the case, where do I point him in the right direction?
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jendavis I had to install ASP.NET AJAX 1.0 to get my application work correctly. You have to install it on the server.
Go here to download and get more info:
ASP.NET AJAX 1.0
http://www.microsoft.com/downloads/details.aspx?FamilyID=ca9d90fa-e8c9-42e3-aa19-08e2c027f5d6&displaylang=en
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wolfedev Yes. Search for System.Web.Extensions.dll and copy it to the directory where you file are. If you do not see the file, search for it on microsoft website. It should be available for download.
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mbaocha 
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