WP8 ApplicationBar

 <!--菜单栏-->
    <phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True" >      
            <shell:ApplicationBarIconButton x:Name="appbar_downlist" IconUri="/Images/downlist.png" Click="Downlist_Click" Text="下载列表"/>
            <shell:ApplicationBarIconButton x:Name="appbar_cancel" IconUri="/Images/cancel.png" Click="Cancel_Click" Text="取消"/>
        </shell:ApplicationBar>

    </phone:PhoneApplicationPage.ApplicationBar>

 private void Downlist_Click(object sender, EventArgs e)
       {  
               MessageBox.Show("hello world");   
       }


       private void Cancel_Click(object sender, EventArgs e)
       {
           base.NavigationService.GoBack();
       }