Hi.. I have some 250 to 300 items in a dropdownlist (also tried this using HTML select with runat="server"). If I select the dropdown, expand the list and press any key, ex. 'S', it displays the first item starting in 'S' ex. Sacramento. But however, it is not scrolling the list down to that item and highlight the item displaying other adjacent items to 'Sacramento' in the list. If I press down arrow key, it selects the next item in 'S' ex. San Jose, but still in the expanded area, it just displays only the top 10-15 items from 'A' to 'C'. I would like the user to navigate (scroll) all the items using the UP and Down arrow keys and at any point they should see the adjacent items in the list. Is this possible? Any help is appreciated.

Thanks, Raj 

what i understand is, you need to create a DropDownList / web control for DropDownList with "AutoComplete" behaviour...

check out below tutorial with code; might give you some workaround..

An ASP.NET 2.0 AutoComplete DropDownList

Good Luck./. 

Hi friends,

even I am interested in knowing answer for this question. 

 Hi Kausha,

Thank you for taking time to reply. I saw the link regarding the AutoComplete Dropdownlist. But what I need is something different and not 2 letter search dropdown. My problem is, if I click on the dropdown, it expands displaying first 15 items from 'A' to 'C'. If I press any other key, like as I mentioned 'S', the vertical scroll bar of the dropdown is not scrolling (or taking me) to the item starting in 'S', but shows the first item starting in 'S' 'Sacramento' on top with the A-C items still displaying below 'Sacramento'. If I press 'S' again or the Down arrow, it selects the next item 'San Jose'. This is correct. But even now, 'San Jose' is shown as selected on top with the same items A-C below it. I don't know why it is not scrolling down to the item 'San Jose' in the list and highlight it.

Hurray!!!

Friends! I got the solution. The problem is because of setting width for the dropdown. I removed Width="150px" from <asp:dropdownlist> and style="width:150px" in HTML Select. Now both the controls scrolls down to the first item of any character pressed and scrolls that item into view. Also I am able to navigate to the next available items that are still in view.

Hi rajkumar,

kindly post your code on this forum for reference.