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02.01.2008 at 07:10AM PST, ID: 23129669
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6.6

AJAX Control Toolkit - Could not load file or assembly System.Web.Extension

Zones: .NET Framework 3.x versions, Programming for ASP.NET, Visual Studio 2008
Tags: ASP.Net 2.0, VB, VS2008, Could not load file or assembly 'System.Web.Extension, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified., AJAX Control Toolkit
I just installed the AJAX Control Toolkit and am trying to get a simple <cc1:ConfirmButtonExtender> to work on a page with nothing but a textbox, a button and a label per the video on www.asp.net/ajax.
I get a complile error:
Could not load file or assembly 'System.Web.Extension, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.            

Here it the default.aspx page:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<%@ register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
   
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <br />
   
    </div>
        <asp:Button ID="Button1" runat="server" Text="Button" />
        <cc1:ConfirmButtonExtender ID="Button1_ConfirmButtonExtender" runat="server"
            ConfirmText="Are you sure?" TargetControlID="Button1">
        </cc1:ConfirmButtonExtender>
        <br /><br />
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br /><br />
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    </form>
</body>
</html>
            
...and my web.config which includes the lines:
                        <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.Extension, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" tagPrefix="cc1"/>

I read one post that said that the assembly was causing his problem so I tried both:
<add namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" tagPrefix="cc1"/> and
<add namespace="AjaxControlToolkit" tagPrefix="cc1"/>



I have:
Installed Visual Studio 2008 on my PC
Installed .NET Framework 3.5 on the Web Server
Installed AJAX Control Toolkit on my PC
Added a reference in the Project to System.Web.Extension
Gone into .NET Framework 2.0 Configureation, Runtime Security Policy and adjusted the security level for Local Intranet to Full Trust.

What could still be the problem?

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<?xml version="1.0"?>
<!-- 
    Note: As an alternative to hand editing this file you can use the 
    web admin tool to configure settings for your application. Use
    the Website->Asp.Net Configuration option in Visual Studio.
    A full list of settings and comments can be found in 
    machine.config.comments usually located in 
    \Windows\Microsoft.Net\Framework\v2.x\Config 
-->
<configuration>
	<configSections>
		<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
			<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
				<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
				<sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
					<section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/>
					<section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
					<section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
					<section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
				</sectionGroup>
			</sectionGroup>
		</sectionGroup>
	</configSections>
	<appSettings/>
	<connectionStrings/>
	<system.web>
		<!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
 
            Visual Basic options:
            Set strict="true" to disallow all data type conversions 
            where data loss can occur. 
            Set explicit="true" to force declaration of all variables.
        -->
		<compilation debug="true" strict="false" explicit="true">
			<assemblies>
				<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
				<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
				<add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
				<add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
				<add assembly="System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
				<add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
				<add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/></assemblies>
		</compilation>
		<pages>
			<namespaces>
				<clear/>
				<add namespace="System"/>
				<add namespace="System.Collections"/>
				<add namespace="System.Collections.Generic"/>
				<add namespace="System.Collections.Specialized"/>
				<add namespace="System.Configuration"/>
				<add namespace="System.Text"/>
				<add namespace="System.Text.RegularExpressions"/>
				<add namespace="System.Linq"/>
				<add namespace="System.Xml.Linq"/>
				<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"/>
			</namespaces>
			<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.Extension, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" tagPrefix="cc1"/>
<!--        
        <add namespace="AjaxControlToolkit" tagPrefix="cc1"/>
        <add namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" tagPrefix="ajaxToolkit"/>
        <add namespace="AjaxControlToolkit" tagPrefix="cc1"/>
-->
      </controls>
		</pages>
		<!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
        -->
		<authentication mode="Windows"/>
		<!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace.
 
        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
		<httpHandlers>
			<remove verb="*" path="*.asmx"/>
			<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
			<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
			<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
		</httpHandlers>
		<httpModules>
			<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
		</httpModules>
	</system.web>
	<system.codedom>
		<compilers>
			<compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
				<providerOption name="CompilerVersion" value="v3.5"/>
				<providerOption name="WarnAsError" value="false"/>
			</compiler>
			<compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" warningLevel="4" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
				<providerOption name="CompilerVersion" value="v3.5"/>
				<providerOption name="OptionInfer" value="true"/>
				<providerOption name="WarnAsError" value="false"/>
			</compiler>
		</compilers>
	</system.codedom>
	<!-- 
        The system.webServer section is required for running ASP.NET AJAX under Internet
        Information Services 7.0.  It is not necessary for previous version of IIS.
    -->
	<system.webServer>
		<validation validateIntegratedModeConfiguration="false"/>
		<modules>
			<remove name="ScriptModule"/>
			<add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
		</modules>
		<handlers>
			<remove name="WebServiceHandlerFactory-Integrated"/>
			<remove name="ScriptHandlerFactory"/>
			<remove name="ScriptHandlerFactoryAppServices"/>
			<remove name="ScriptResource"/>
			<add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
			<add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
			<add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
		</handlers>
	</system.webServer>
	<runtime>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<dependentAssembly>
				<assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
				<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
			</dependentAssembly>
			<dependentAssembly>
				<assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
				<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
			</dependentAssembly>
		</assemblyBinding>
	</runtime>
</configuration>
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Question Stats
Zone: Programming
Question Asked By: megnin
Solution Provided By: Bane83
Participating Experts: 1
Solution Grade: A
Views: 1042
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02.01.2008 at 07:16AM PST, ID: 20797154

Rank: Master

Bane83:

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02.01.2008 at 07:23AM PST, ID: 20797225
megnin:

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02.01.2008 at 07:24AM PST, ID: 20797244
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02.01.2008 at 07:32AM PST, ID: 20797356

Rank: Master

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02.01.2008 at 07:34AM PST, ID: 20797379
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02.01.2008 at 07:42AM PST, ID: 20797469
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02.01.2008 at 07:45AM PST, ID: 20797490
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02.01.2008 at 07:49AM PST, ID: 20797537

Rank: Master

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02.01.2008 at 07:50AM PST, ID: 20797542
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02.01.2008 at 07:56AM PST, ID: 20797607
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02.01.2008 at 08:21AM PST, ID: 20797866
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02.01.2008 at 07:16AM PST, ID: 20797154

Rank: Master

Bane83:
Have you installed the ajax library though?  They're two separate downloads and the ajax library is required:

http://www.asp.net/ajax/ (click the download essential components link).

Also, if you already have System.Web.Extensions (v3.5) on your system, try copying it over to the bin directory of your application.
 
02.01.2008 at 07:23AM PST, ID: 20797225
megnin:
>Also, if you already have System.Web.Extensions (v3.5) on your system, try copying it over to the bin directory of your application.

In the Bin directory of my project I have:
AjaxControlToolkit.dll
         AjaxControlToolkit.dll.refresh
AjaxControlToolkit.pdb

I don't understand what you mean "...have System.Web.Extensions (v3.5) on your system..."
To copy it, where would I find it and what would it look like?  Sorry to sound dense.  
At the bottom of my question I listed what I have installed so far.

I'm checking the ajax library now...
 
02.01.2008 at 07:24AM PST, ID: 20797244
megnin:
The first sentence on the link you provided states:
"AJAX functionality is integrated in ASP.NET 3.5 and does not require any additional downloads."
 
02.01.2008 at 07:32AM PST, ID: 20797356

Rank: Master

Bane83:
You should have the System.Web.Extensions.dll file somewhere on your system.  I only have the .NET v2.0 copy, but mine is in:

C:\Program Files\Microsoft ASP.NET\ASP.NET 2.0 AJAX Extensions\v1.0.61025\

I'd guess yours is in a similar location, but if you can't find it there you can also do a system search for it (probably easier).
Accepted Solution
 
02.01.2008 at 07:34AM PST, ID: 20797379
megnin:
In the Bin folder of my project should I "Add Reference" or "Add Existing Item"?
 
02.01.2008 at 07:42AM PST, ID: 20797469
megnin:
I found mine in C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5

Why would it not be placed where it is required upon installation.

That seems to me like buying a car and it not having a gas tank and the dealer not mentioning the fact that it doesn't have one.
 
02.01.2008 at 07:45AM PST, ID: 20797490
megnin:
I copied the System.Web.Extensions.dll file into the Bin directory of my project and it did not change the error.  
I still get a complile error:
Could not load file or assembly 'System.Web.Extension, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
 
02.01.2008 at 07:49AM PST, ID: 20797537

Rank: Master

Bane83:
Ok, now remove the existing reference to System.Web.Extensions and add a reference to it from your Bin folder.
 
02.01.2008 at 07:50AM PST, ID: 20797542
megnin:
The AJAX Control Toolkit installs a SampleWebSite.  That builds and runs fine with no problems.
 
02.01.2008 at 07:56AM PST, ID: 20797607
megnin:
The SampleWebSite does not have it in the Bin folder and it works fine.

I could find no way to remove a reference, but I right clicked on the Bin folder and selected the System.Web.Extensions.dll within and added it to the references.  Didn't change anything.  Same build error.
 
02.01.2008 at 08:21AM PST, ID: 20797866
megnin:
I closed that Solution and started another page from scratch and it worked fine.  Go figure.

Thank you for your assistance.  Regardless of what the problem actually was, I learned some new places to look for solutions to problems like this and things to check for.

Thanks you.
 
 
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