Grid-view in visual web-part!

Question

I have created a visual web-part and I have a dropdown list and a gridview on it. on c# I have created a query:

string selected = DropDownList1.SelectedValue;

       query.Query = @"<Where><Eq>
                         <FieldRef Name='Team' />
                         <Value Type='Text'>"+ selected+ @"</Value>
                      </Eq></Where>";

it has 3 menu: 1)small 2)medium 3)large

also in my code I have include AutoPostBack="true" It works fine but it is a problem for every time I change the dropdown value i.e from small to large it refreshes me the page. If I dont use this AutoPostBack="true" it doesn't refresh the page but it wont load the new query! Is there any way to complete this action without refreshing the page?

Answer 1

You should run the query when a submit button is pressed, or when the dropdown is changed, not on page load.