How to reset the datapager numeric pager field?

I'm using datapager in my listview control and I want my datapager to always set to default as numeric pager field equals

to 1 everytime I reload the page. For example if the current page is on page 3 but when I click something that will reload

the page I want to set the datapager back to its default as numeric pager field goes back to 1. How do I do this? Thanks...