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AJAX :: AjaxControlToolkit Version 4.1.40412.0 Is Required

We get this Warning in the Event Log from time to time. It seems to crasch our web so an iisreset is required.I have checked the version of AjaxControlToolkit that we use - and it is the version it says it needs. So what should I do?

Exception information:
Exception type: InvalidOperationException
Exception message: The requested script resource 'Common.Common.js' requires version 'AjaxControlToolkit, Version=4.1.40412.0, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' of the ASP.NET AJAX Framework. To use this resource, make sure that the application references version 'AjaxControlToolkit, Version=4.1.40412.0, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e'.

View 7 Replies (Posted: Feb 15, 2011 09:23 AM)

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i am working in webapplication in using c#.I have a problem that currently i am using ajaxcontroltoolkit version 3.0.20820.0 but in this toolkit i don't have Editor Ajax control so i want to upgrade it with new version ajaxcontroltoolkit version 3.5.40412.2

When i upgrade it then my old ajax control is not working like validatorcalloutextender and requiredfieldvalidator etc.

so please tell me how can i upgrade ajaxcontroltoolkit version from 3.0.20820.0 to version 3.5.40412.2

i also use in web.config file but not successfull.

Posted: Jan 5 at 6:32

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I develop an ASP.NET 2.0 with VS 2008, VB.NET, and sometime a get this exception when web application is launching.

Message Parser Error: Could not load file or assembly 'AjaxControlToolkit, Version = 3.5.40412.0, Culture = neutral, PublicKeyToken = 28f01b0e84b6d53e' or one of its dependencies.The definition from the assembly manifest does not match the assembly reference. (Exception from HRESULT: 0x80131040)

To solve this problem, I need to regenerate the project. I would like to understand why this error append sometime. I try to check the version referenced in project property, try to check the version attribute on Web.Config :

<pages theme="Formulaires" validateRequest="false" styleSheetTheme="Formulaires" enableEventValidation="false" enableViewStateMac="false">
<add tagPrefix="ajaxToolkit" namespace="AjaxControlToolkit" assembly="AjaxControlToolkit, Version=3.5.40412.0, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e" />
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add namespace="System"/>
<add namespace="System.Collections"/>
<add namespace="System.Collections.Specialized"/>
<add namespace="System.Configuration"/>
<add namespace="System.Text"/>
<add namespace="System.Text.RegularExpressions"/>
<add namespace="System.Web"/>
<add namespace="System.Web.Caching"/>
<add namespace="System.Web.SessionState"/>
<add namespace="System.Web.Security"/>
<add namespace="System.Web.Profile"/>
<add namespace="System.Web.UI"/>
<add namespace="System.Web.UI.WebControls"/>
<add namespace="System.Web.UI.WebControls.WebParts"/>
<add namespace="System.Web.UI.HtmlControls"/>

It the correct version... i don't understand about this problem.

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On my server, I've installed Framework 3.5 and I use Ajax Control tool kit version 3.5.40412.0.

I've got a similar problem than other people, but I can't find any solution.I've got the Error message when I want to load a page : CS1705: Assembly AjaxControlKit version 3.5.40412.0 [...] use System.Web.extensions Version [...] which have a higher version than Assembly System.Web.Extensions Version 1.0.61025.0

On my server in folder C:windowsAssembly, I have System.Web.extensions Version and System.Web.Extensions Version 1.0.61025.0 so in theory it can work no ?In my webconfig file I try to add this code :

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I found the following at

This release includes over 10 patch fixes provided by members of the Toolkit community. We would like to specially thank all the patch contributors for their effort which helped make this release possible. We recognize their names on the

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// Version:
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// Name: MicrosoftAjaxWebForms.debug.js
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// Name: MicrosoftAjaxWebForms.debug.js
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IIS6 To IIS7.5 - Now AjaxControlToolkit Error "Type.registerNamespace('AjaxControlToolkit')"
Moved our web application from W2003 & IIS6 to W2008 R2 & IIS7.5 . One of the first things we discovered was to set the Application Pool in "Classic" mode. However we are still not out of the woods. We are having a AjaxControlToolKit error. I have attached a screenshot but in summary, the first line of code referring to the AjaxControlToolKit is flagged in error, Type.registerNamespace('AjaxControlToolkit'); The Debugger throws the error text below: 'Type' is undefined Default.aspx?

_TSM_HiddenField_=ScriptManager1_Hidd enField&_TSM_CombinedScripts_=%3b%3bAjaxControlToo lkit%2c+Version%3d1.0.20229.26116%2c+Culture%3dneu tral%2c+PublicKeyToken%3d28f01b0e84b6d53e%3aen-US%3a63cfabab-51ed-48ea-9a51-d25d550c85e3%3ae2e86ef9%3a9ea3f0e2%3a9e8e87e9%3a1d f13a87%3a4c9865be%3aba594826%3a757f92c2%3a3858419b %3a96741c43%3ac4c00916%3ac7c04611%3acd120801%3a38e c41c0,

line 21 character 1I have made sure that AjaxControlToolKit.dll (ver 1.0.20229) is in the Bin folder of my website.


Entire web.config is in attacment also. I am not sure what else has to happen to move to the newer Microsoft platforms?

Posted: Oct 15 10

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AJAX :: Could Not Load File Or Assembly 'AjaxControlToolkit.dll'
Server Error in '/AJX' Application.

Parser Error


An error occurred during the parsing of a resource required to service this request. review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load file or assembly 'AjaxControlToolkit.dll' or one of its dependencies. The system cannot find the file specified.

Source Error:


[No relevant source lines]Source File: none Line: 0 Assembly Load Trace: The following information can be helpful to determine why the assembly 'AjaxControlToolkit.dll' could not be loaded.


WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLMSoftwareMicrosoftFusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLMSoftwareMicrosoftFusion!EnableLog].

Version Information:Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3614

Posted: Sep 23, 2010 04:05 PM

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AJAX :: Updated To AjaxControlToolkit 3.5 And Getting Load Of Errors
I am using Ajax on a Sharepoint 2007 website and I have copied in the AjaxControlToolkit.dll into the bin folder.

Method CreateModalUpdateProgress Details Could not load file or assembly 'AjaxControlToolkit, Version=1.0.20229.20903, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' or one of its dependencies. The located assembly's
manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) Stack Trace MyWebParts. HelperClasses. WebPartControlFactory. CreateModalUpdateProgress (Control controlToAddTo) MyWebParts. BaseClasses.
BaseWebPart. CreateChildControls()

Please contact a system administrator and provide them with these details

Posted: Aug 12, 2010 02:05 PM

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AJAX :: Errors In Web.config After Installing Ajaxcontroltoolkit
Got a list of these errors after installing ajaxcontroltoolkit for VS2005 "requiredPermission attribute not decalred" "could not find schema for Element ElementName"

Posted: Jul 13, 2010 10:51 AM

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Ajaxcontroltoolkit - Slider Extender Control In Ajax?
I am using Slider Extender for the very first time and i am not able to figure out why am i facing this problem, the problem is mentioned below :I kept the slider extender, Script Manager and 2 text boxes(one for TargetControl and one for BoundControl), i have given all required values (i.e. Maximum, minimum, steps etc.)
now the slider should load on page load. Although the slider is loading on page load but the Bar of the slider is coming out of position. The same thing when i did with Orientation as Horizontal it worked properly but for Vertical orientation it is giving the above problem.

Posted: Feb 15 at 13:07

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AJAX :: Ajaxcontroltoolkit.dll / Data Lost After Upgrade
I built a page with a cascading dropdown extension tied to a db, (and another one to xlm source), which was working fine. then I tried to update my ajaxcontroltoolkit.dll becuase I had an old version, then the sudden the all the data in the dropdown lists is lost.

Posted: Feb 26, 2011 05:36 AM

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