Wednesday, March 21, 2012

Parser Error Message: Could not load file or assembly AjaxControlToolkit or one of its dep


I am using ASP.Net 2.0 with AJAX Extensions 1.0. And one of my aspx was using 2 of the ajaxtoolkit namely the ModalPopupExtender and RoundedCornersExtender. But why is it that when I will access the page from the web server the error below will display on the page. It's really frustrating because there's no problem when running locally in my machine thru Visual Web Developer 2005 Express Edition.

I hope you could help me figuring the problem.


Error message:

Server Error in '/' Application.

Parser Error

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

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

Source Error:

Line 1: < Page Language="VB" AutoEventWireup="false" CodeFile="test.aspx.vb" Inherits="test" %>Line 2: < Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>Line 3: Line 4: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

Source File:/pfadmin/test.aspx Line:2

Assembly Load Trace: The following information can be helpful to determine why the assembly 'AjaxControlToolkit' could not be loaded.

WRN: Assembly binding logging is turned OFF.To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!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 [HKLM\Software\Microsoft\Fusion!EnableLog].

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210

You need to deploy the AjaxControlTookit (DLL) to the server (in your bin directory or in the GAC).


Hi hifiger2004,

You can just include the AjaxControlToolkit.dll into the BIN folder of your website/webapplication. There is no need to deploy it to the GAC. (Maybe you don't have the right to do that.)

Also check if some plain ajax functionallity works on the webserver!!! For example: A simple updatePanel holding a, and a button to trigger it. Note that the ajax functionality must work in order to use the AjaxControl Toolkit.

Please let me know how it worked out!
Kind regards,

You have to include the AjaxControlToolkit.dll into the bin folder of your webapplication

Let me know if this helpful to you

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