show diffrent appbar for windows phone pivot page

 

    <phone:PhoneApplicationPage.Resources>                <shell:ApplicationBar x:Key="AppBar0" IsMenuEnabled="True" IsVisible="True" Mode="Default" Opacity="0.8"                               BackgroundColor="Black" ForegroundColor="White">            <shell:ApplicationBarIconButton x:Name="HotTopicsRefreshButton" Text="重新整理"                                             IconUri="/Assets/Icons/refresh.png"                                             Click="HotTopicsRefreshButton_Click" />            <shell:ApplicationBarIconButton x:Name="HotTopicsSearchButton" Text="搜尋"                                             IconUri="/Assets/Icons/feature.search.png"                                             Click="SearchButton_Click" />            <shell:ApplicationBar.MenuItems>                <shell:ApplicationBarMenuItem Text="設定" Click="SettingsButton_Click"/>            </shell:ApplicationBar.MenuItems>        </shell:ApplicationBar>        <shell:ApplicationBar x:Key="AppBar1" BackgroundColor="Black" ForegroundColor="White" IsMenuEnabled="True"                               IsVisible="True" Mode="Default" Opacity="0.8">            <shell:ApplicationBarIconButton Text="管理" IconUri="/Assets/Icons/favs.png" Click="ManageSubwordsBtn_Click"/>            <shell:ApplicationBarIconButton  Text="重新整理"                                             IconUri="/Assets/Icons/refresh.png"                                              />            <shell:ApplicationBarIconButton  Text="搜尋"                                             IconUri="/Assets/Icons/feature.search.png"                                             Click="SearchButton_Click" />            <shell:ApplicationBar.MenuItems>                <shell:ApplicationBarMenuItem Text="設定" Click="SettingsButton_Click"/>            </shell:ApplicationBar.MenuItems>        </shell:ApplicationBar></phone:PhoneApplicationPage.Resources> 

in cs code:

            if (PhonePivot.SelectedIndex == 0)            {                ApplicationBar = (IApplicationBar)Resources["AppBar0"];            }            else if (PhonePivot.SelectedIndex == 1)            { ApplicationBar = (IApplicationBar)Resources["AppBar1"];}            if (ApplicationBar != null)            {                ApplicationBar.BackgroundColor = System.Windows.Media.Colors.Black;                ApplicationBar.ForegroundColor = System.Windows.Media.Colors.White;            }