Configuration Error: Could not load type..........

Hi all,

I have an issue with an AJAX.NET enabled web site that i have written. This site was completed and worked fine on our dev server, but then the dev server was rebuilt, and then the fun began. I have reloaded the site onto the newly setup server, installed AJAX.NET (the current version, which i also developed the site under). But the site will not load and i keep getting the follow error

Parser Error Message:Could not load type 'System.Web.UI.Compatibility.CompareValidator' from assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

Source Error:

Line 51: </controls>Line 52: <tagMapping>Line 53: <add tagType="System.Web.UI.WebControls.CompareValidator" mappedTagType="System.Web.UI.Compatibility.CompareValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>Line 54: <add tagType="System.Web.UI.WebControls.CustomValidator" mappedTagType="System.Web.UI.Compatibility.CustomValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>Line 55: <add tagType="System.Web.UI.WebControls.RangeValidator" mappedTagType="System.Web.UI.Compatibility.RangeValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

I have tried uninstalling and reinstalling AJAX.NET, Moving the 2 AJAX dll's into the projects BIN directory, and also manually putting the 2 AJAX dlls into the GAC, and nothing has made a bit of difference, and so im posting on here......

any help would be greatly appreciated!
Rob Earlam

The validators were removed from the latest release. The default Web.config that comes with the RTM release no longer has the validators in the <tagMapping> element.

Here is a pointer to a blog post that describes how you can download the compatibility validators:http://weblogs.asp.net/scottgu/archive/2007/01/25/links-to-asp-net-ajax-1-0-resources-and-answers-to-some-common-questions.aspx

Hope this helps,

Scott

All is working fine now

Thanks Alot
Rob

I am working on a team project.

On Other system they haven't got this error.

On my system I have commented the following lines in the web.config {locally}

<!--

<tagMapping>

<add tagType="System.Web.UI.WebControls.CompareValidator" mappedTagType="System.Web.UI.Compatibility.CompareValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add tagType="System.Web.UI.WebControls.CustomValidator" mappedTagType="System.Web.UI.Compatibility.CustomValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add tagType="System.Web.UI.WebControls.RangeValidator" mappedTagType="System.Web.UI.Compatibility.RangeValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add tagType="System.Web.UI.WebControls.RegularExpressionValidator" mappedTagType="System.Web.UI.Compatibility.RegularExpressionValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add tagType="System.Web.UI.WebControls.RequiredFieldValidator" mappedTagType="System.Web.UI.Compatibility.RequiredFieldValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add tagType="System.Web.UI.WebControls.ValidationSummary" mappedTagType="System.Web.UI.Compatibility.ValidationSummary, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

</tagMapping> kamran

-->

Then I can't get this error.{I don't know why this error appear on my system and doesn't on other systems}

If i comment these line in my project which all team developer work what could be the result ?

What Should I do ?

Found that on other system there were old ajax installation were installed

So I uninstalled the latest ajax extension and install the old one.

Then as on other system enable the lines above then my application start working on my system.

Now What Should I do .Can I install the new extension on all systems and comments these lines on other system as well.

{I am asking it as Could it lead to some problems or not}