How to implement Ajaxified details view hide on PageIndexChanging

Previously I showed how to enable DetailsView with a Select button (link). But here is how to get rid of the DetailsView if Paging is enabled by using the PageIndexChanging method.

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        // get rid of the details view
        DetailsView1.DataSource = null;
        DetailsView1.DataBind();

        GridView1.PageIndex = e.NewPageIndex;
        GridView1.DataBind();
    }

To Ajaxify it within an update panel, add a Trigger for the Gridview1 object and the PageIndexChanging event.