sort a items of combobox control in asp.net using Jquery?

hi,

for this you can use AutoComplete textbox .

refer to this link

using JQuery

http://dotnetmylife.blogspot.in/2013/10/jquery-autocomplete-getting-data-from.html


using ajax control toolkit

http://www.aspdotnet-suresh.com/2011/05/ajax-autocompleteextender-sample.html

What is the use of Combo box having multiple options? If you hide all other options.

Are you talking about auto complete text box? Have a look here