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September 2012 Release

Rating:        Based on 9 ratings
Reviewed:  9 reviews
Downloads: 186771
Released: Sep 19, 2012
Updated: Sep 20, 2012 by Superexpert
Dev status: Stable Help Icon

Recommended Download

Application Ajax Control Toolkit 4
application, 7018K, uploaded Sep 20, 2012 - 126809 downloads

Other Available Downloads

Application Ajax Control Toolkit 4.5
application, 7012K, uploaded Sep 20, 2012 - 24612 downloads
Application Ajax Control Toolkit 3.5
application, 6959K, uploaded Sep 20, 2012 - 35350 downloads

Release Notes

AJAX Control Toolkit Release Notes - September 2012 Release

Version 60919

September 2012 release of the AJAX Control Toolkit.
  • AJAX Control Toolkit .NET 4.5 – AJAX Control Toolkit for .NET 4.5 and sample site (Recommended).
  • AJAX Control Toolkit .NET 4 – AJAX Control Toolkit for .NET 4 and sample site (Recommended).
  • AJAX Control Toolkit .NET 3.5 – AJAX Control Toolkit for .NET 3.5 and sample site (Recommended).

- The current version of the AJAX Control Toolkit is not compatible with ASP.NET 2.0. The latest version that is compatible with ASP.NET 2.0 can be found here: 20229.
- Pages using controls from AJAX Control Tookit .NET 3.5 must use the ToolkitScriptManager, rather than the ASP.NET ScriptManager.
- AJAX Control Tookit .NET 4 cannot be loaded in Visual Studio 2008. It requires Visual Studio 2010.
- When using the Ajax Control Toolkit with Visual Studio 2008, you must have Visual Studio Service Pack 1 installed.
- Instructions for contributing a bug report can be found at

Getting Started

Learn how to install the toolkit and add the toolkit to the Visual Studio/Visual Web Developer toolbox with the following videos and tutorials.

What's New?

The biggest change with this release is support for ASP.NET 4.5.

This release also contains fixes for several of the highest voted issues associated with the CascadingDropDown control including:
  • 9490 - Don't disable dropdowns in CascadingDropDown
  • 14223 - CascadingDropDown Reset or Setting SelectedValue from WebMethod
  • 12189 - CascadingDropDown not obeying disabled state of DropDownList
  • 22942 - CascadingDropDown infinite loop (with solution)
  • 8671 - CascadingDropdown options is null or undefined
  • 14407 - CascadingDropDown: populated client event happens too often
  • 17148 - CascadingDropDown - Add "UseHttpGet" property
  • 10221 - No NotNull check in CascadingDropDown
  • 12228 - Provide property for case-insensitive DefaultValue lookup in CascadingDropdown

We also fixed the following two issues which are not directly related to the CascadingDropDown control:
  • 27108 - CalendarExtender: Bug when selecting December shifts to January.
  • 27041 - Input controls with HTML5 types do not post back in Firefox, Chrome, Safari

Finally, we integrated several Pull Requests contributed by the community:
  • Added French localized resources for the AjaxFileUpload
  • Resolved an issue which prevented the AjaxFileUpload control from working with pages that require query string variables.
  • Extended the AjaxFileUploadEventArgs class to include the current file index in the queue and the total number of files in the queue.
  • Fixed an issue with TabContainer and TabPanel which caused the OnActiveTabChanged event to fire too often.

This release of the Ajax Control Toolkit was brought to you by Superexpert Consulting -- we build ASP.NET websites

Reviews for this release

Tabs launch an error within _setfocus function (Tabs.pre.js) for invisible tabpanel.
by carlshe on Jan 23, 2013 at 3:27 PM
Can the CascadingDropDown control please get a fix to allow Webkit browsers to not run in an infinite loop? I know there was a release for this, but I still experience the issue!
by tsweb8033 on Jan 15, 2013 at 2:00 AM
First of all, thank you for all great and hard works!! "8671 - CascadingDropdown options is null or undefined" problem does not seem fixed. I still encountered the problem using the September Release. :-(
by itnovator on Jan 11, 2013 at 8:07 PM
What about ajax uploader is it fixed ?
by hajjaj on Dec 30, 2012 at 8:04 AM
The source code is for v4 not v4.5
by christkhoda on Nov 27, 2012 at 11:15 PM
The source code IS here. Choose 'Source Code' from the top menu, then select 'Download'.
by msawczyn on Nov 27, 2012 at 4:34 PM
Open source release without the source? It's been 2 months, plenty of time to get the source uploaded.
by kturney on Nov 20, 2012 at 2:45 PM
Great work! Thanks!
by cristoforocataldo on Sep 25, 2012 at 1:58 PM
The tab container no longer functions and renders most of site useless.
by OnyxDave on Sep 24, 2012 at 7:08 PM