如何强制Windows Phone 8应用程序在浅色主题中运行

你可以

使用Jeff Wilcox的ThemeManager

将其添加到项目(有一个可用的 NuGet 包(，并从构造函数调用App()它。

public App()
{
    // Global handler for uncaught exceptions.
    UnhandledException += Application_UnhandledException;
    // Standard Silverlight initialization
    InitializeComponent();
    // Phone-specific initialization
    InitializePhoneApplication();
    ThemeManager.ToLightTheme();
    // Other code that might be here already...
}

您可以在他的网站上找到使用示例。

对于 Windows Phone 8.1，您可以使用：

<Application
    x:Class="App26.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    RequestedTheme="Light"
    xmlns:local="using:App26">
</Application>

或

public App()
    {
        this.RequestedTheme = ApplicationTheme.Light;
        this.InitializeComponent();
        this.Suspending += this.OnSuspending;
    }

来源 ： Windows Phone 8 即使手机的主题发生了变化，如何始终保持一个主题

来自 http://developergoodies.blogspot.nl/2012/10/force-windows-phone-theme.html

(经过测试和验证;获取主题;从资源复制以防止将来无法访问(

答

当 UI 是专门为深色主题设计的时，它在浅色主题上看起来不太好，反之亦然。

为了防止这种情况，应用程序可以强制使用默认的深色或浅色主题。

在应用程序类的构造函数中，将以下代码强制使用深色主题：

if ((Visibility)Application.Current.Resources["PhoneLightThemeVisibility"] == Visibility.Visible) MergeCustomColors("/Themes/DarkStyles.xaml");

或者这段代码来强制浅色主题：

if ((Visibility)Application.Current.Resources["PhoneDarkThemeVisibility"] == Visibility.Visible) MergeCustomColors("/Themes/LightStyles.xaml");

在项目中的任何位置放置此方法：

private void MergeCustomColors(String Theme)
{
    ResourceDictionary Dictionaries = new ResourceDictionary();
    String source = String.Format(Theme);
    var themeStyles = new ResourceDictionary { Source = new Uri(source, UriKind.Relative) };
    Dictionaries.MergedDictionaries.Add(themeStyles);
    ResourceDictionary appResources = Current.Resources;
    foreach (DictionaryEntry entry in Dictionaries.MergedDictionaries[0])
    {
        SolidColorBrush ColorBrush = entry.Value as SolidColorBrush;
        SolidColorBrush ExistingBrush = appResources[entry.Key] as SolidColorBrush;
        if (ExistingBrush != null && ColorBrush != null) { ExistingBrush.Color = ColorBrush.Color; }
    }
}

该代码假定项目在名为"主题"的文件夹中包含文件 DarkStyles.xaml 和 LightStyles.xaml。

在应用构造函数中调用此方法

private void LightTheme()
    {
        ((SolidColorBrush)Resources["PhoneRadioCheckBoxCheckBrush"]).Color = ((SolidColorBrush)Resources["PhoneRadioCheckBoxBorderBrush"]).Color = ((SolidColorBrush)Resources["PhoneForegroundBrush"]).Color = Color.FromArgb(0xDE, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneBackgroundBrush"]).Color = Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF);
        ((SolidColorBrush)Resources["PhoneContrastForegroundBrush"]).Color = Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF);
        ((SolidColorBrush)Resources["PhoneContrastBackgroundBrush"]).Color = Color.FromArgb(0xDE, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneDisabledBrush"]).Color = Color.FromArgb(0x4D, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneProgressBarBackgroundBrush"]).Color = Color.FromArgb(0x19, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextCaretBrush"]).Color = Color.FromArgb(0xDE, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextBoxBrush"]).Color = Color.FromArgb(0x26, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextBoxForegroundBrush"]).Color = Color.FromArgb(0xDE, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextBoxEditBackgroundBrush"]).Color = Color.FromArgb(0x00, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextBoxReadOnlyBrush"]).Color = Color.FromArgb(0x2E, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneSubtleBrush"]).Color = Color.FromArgb(0x66, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextBoxSelectionForegroundBrush"]).Color = Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF);
        ((SolidColorBrush)Resources["PhoneButtonBasePressedForegroundBrush"]).Color = Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF);
        ((SolidColorBrush)Resources["PhoneTextHighContrastBrush"]).Color = Color.FromArgb(0xDE, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextMidContrastBrush"]).Color = Color.FromArgb(0x73, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneTextLowContrastBrush"]).Color = Color.FromArgb(0x40, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneSemitransparentBrush"]).Color = Color.FromArgb(0xAA, 0xFF, 0xFF, 0xFF);
        ((SolidColorBrush)Resources["PhoneInactiveBrush"]).Color = Color.FromArgb(0x33, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneInverseInactiveBrush"]).Color = Color.FromArgb(0xFF, 0xE5, 0xE5, 0xE5);
        ((SolidColorBrush)Resources["PhoneInverseBackgroundBrush"]).Color = Color.FromArgb(0xFF, 0xDD, 0xDD, 0xDD);
        ((SolidColorBrush)Resources["PhoneBorderBrush"]).Color = Color.FromArgb(0x99, 0x00, 0x00, 0x00);
        ((SolidColorBrush)Resources["PhoneAccentBrush"]).Color = Color.FromArgb(0xFF, 0x00, 73, 99);
        ((SolidColorBrush)Resources["PhoneChromeBrush"]).Color = Color.FromArgb(0xFF, 0xDD, 0xDD, 0xDD);
    }