Windows Phone 7應用程序欄顯示爲灰色框

Question

我對默認應用程序欄做了非常輕微的修改，但是當我運行代碼時，它僅顯示爲灰色框。這裏的XAML：

<phone:PhoneApplicationPage 
    x:Class="IHeartWords.MainPage" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone" 
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone" 
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 

    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="696" 
    FontFamily="{StaticResource PhoneFontFamilyNormal}" 
    FontSize="{StaticResource PhoneFontSizeNormal}" 
    Foreground="{StaticResource PhoneForegroundBrush}" 
    SupportedOrientations="Portrait" Orientation="Portrait" 
    shell:SystemTray.IsVisible="True" xmlns:my="clr-namespace:Microsoft.Advertising.Mobile.UI;assembly=Microsoft.Advertising.Mobile.UI" Loaded="PhoneApplicationPage_Loaded"> 

    <!--Sample code showing usage of ApplicationBar--> 
    <phone:PhoneApplicationPage.ApplicationBar> 
     <shell:ApplicationBar IsVisible="True" IsMenuEnabled="False"> 
      <shell:ApplicationBarIconButton x:Name="help" IconUri="/icons/appbar.questionmark.rest.png" Text="Help" Click="helpButton_Click"/> 
      <shell:ApplicationBarIconButton x:Name="rules" IconUri="/icons/appbar.feature.settings.rest.png" Text="Rules" Click="rulesButton_Click"/> 
     </shell:ApplicationBar> 
    </phone:PhoneApplicationPage.ApplicationBar> 

</phone:PhoneApplicationPage> 

Answer 1

我想通了。我在後面的代碼中創建了一個新的應用程序欄。刪除了該代碼，我的XAML很好。