Jak uzyskać indeks wierszy wybranego wiersza w Gridview ASP.NET Webforms

  protected void GridView_SelectedIndexChanged(Object sender, EventArgs e)
    {
    	GridView GridView1 = Page.FindControl("GridView1") as GridView;	
	GridViewRow row = GridView1.SelectedRow;   
    } 
Strange Swiftlet