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ASP.NET Ajax and the Ajax Control Toolkit including the Accordion, Calendar, Modal Popup, and more

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DevExpress maintains the free and open sourced Ajax Contr...

Created by tmorton. Latest Post by tmorton on May 20, 2015 07:13 PM

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FAQs for ASP.NET Ajax and the Ajax Control Toolkit

Created by tmorton. Latest Post by tmorton on Jul 16, 2010 03:55 PM

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'Sys' is undefined.

Created by mbettesworth. Latest Post by Thomas Thayi..., Jul 24, 2009 11:40 AM.

4987107 201

Could not load file or assembly 'Microsoft.Web.Extensions...

Created by Peter Smith. Latest Post by Akter-Uddin, Sep 22, 2011 03:00 PM.

4334775 60

Error on ajax.asp.net - sys is undefined

Created by dudedude. Latest Post by Sandy1234, Apr 30, 2009 04:57 AM.

2852709 80

Sys.Webforms.PageRequestManagerServerErrorException actua...

Created by Rama Krishna. Latest Post by Abhishek3366..., Aug 30, 2016 10:39 AM.

2104661 53

Could not load file or assembly System.Web.Extensions

Created by mychucky. Latest Post by babuji_godem, Feb 17, 2010 11:01 PM.

2035620 47

Where is System.Web.Extensions.dll now? Fails on remote...

Created by pkellner. Latest Post by DeepAtNobleR..., Sep 02, 2010 09:18 AM.

1753431 36

Could not load file or assembly 'System.Web.Extensions

Created by antonyliu200.... Latest Post by vinothharsha..., Aug 22, 2013 08:56 AM.

1551280 27

Could not load file or assembly 'System.Web.Extensions, V...

Created by Johnson2007. Latest Post by agargye, Mar 17, 2009 03:28 PM.

1529932 27

Sys.WebForms.PageRequestManagerParserErrorException

Created by jackh. Latest Post by mathew7535, Sep 23, 2009 12:18 PM.

1394280 87

How to resolve "Sys.WebForms.PageRequestManagerParserErro...

Created by asimiq80. Latest Post by Reyu99, May 31, 2012 03:28 PM.

1256656 90

Could not load file or assembly 'AjaxControlToolkit' or o...

Created by john@seedpro.... Latest Post by Crazytw, Jan 30, 2014 10:36 AM.

1193280 30

File Upload Control is not working in Update Panel

Created by kaushalparik.... Latest Post by ShadowDanser, Dec 29, 2010 03:44 PM.

1025933 27

Ajax client-side framework failed to load

Created by craigbtx. Latest Post by souren.hazra, Aug 26, 2012 02:00 PM.

882273 27

Could not load type 'System.Web.UI.ScriptReferenceBase' f...

Created by inmykingdom. Latest Post by sandroagboka..., Sep 25, 2012 01:19 PM.

851832 32

TabContainer and ActiveTabChanged

Created by topo13. Latest Post by aspdotnetlea..., Jan 29, 2014 10:17 PM.

826513 44

PageMethods is undefined

Created by puterart. Latest Post by rmdw, Jan 04, 2011 03:42 PM.

784473 33

WebForms.PageRequestManagerServerErrorException: Status c...

Created by ssanand. Latest Post by bk.komal, Jan 14, 2011 09:19 AM.

783391 39

Unknown server tag

Created by deDogs. Latest Post by chetan.sarod..., Apr 12, 2010 11:05 PM.

754848 12

What's up with UpdatePanels and how come nothing works? O...

Created by Eilon. Latest Post by raja.krish, Apr 18, 2007 12:51 PM.

698925 46

How do I get the CalendarExtender to show over a dropdown...

Created by AirMaro. Latest Post by andymobile, Aug 13, 2010 09:43 AM.

655292 33
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