alaa9jo:

Thanks Petenet,but I don't have a blog and don't know how to create one...I wish I had one..I will post many cool articles like that one.

Anyway,I will help my friend here in that issue and may be you can help me on how to create a blog (if you know of course)

you're welcome.

you can open one here itself (at weblogs.asp.net), use this contact form: http://www.asp.net/feedback/  (refer this thread: http://forums.asp.net/t/1462856.aspx)

the other site was here: http://www.codeproject.com/ (create an account and post! )

Hi

Thank you so much. It worked . I really appreciate your help. 

Hi It worked. Thanks

http://www.thomasclaudiushuber.com/blog/2008/07/31/developing-multicolumn-dropdowndropdownlist-with-aspnet-the-gridview-and-the-ajax-control-toolkit/ 

In case anyone returned to this thread,I published an article about group dropdownlist,here is the link:

http://weblogs.asp.net/alaaalnajjar/archive/2009/11/16/group-options-in-dropdownlist.aspx