怎样在wp7中检测“主题背景”

由于Windows Phone 可以使用深色（黑色）或淡色（白色）主题，知道用户的主题以确定你的应用程序的颜色模式是很重要的一件事。

XAML

<Grid x:Name="LayoutRoot" Background="Transparent">
       <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
          <TextBlock x:Name="PageTitle" Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>
</Grid>

CSharp

public MainPage()
 {
            InitializeComponent();
            Color themebackground = (Color)Application.Current.Resources["PhoneForegroundColor"];
 
            if (themebackground.ToString() == "#FFFFFFFF")
            {
                this.PageTitle.Text = "Dark ";
            }
            else if (themebackground.ToString() == "#DE000000")
            {
                this.PageTitle.Text = "Light ";
            }  
}