在类型 "ResourceDictionary" 中找不到可附加的属性 "ThemeDictionaries"

Question

以下代码在 app.xaml Windows Phone 8 应用程序中。它收到错误 The attachable property "ThemeDictionaries" was not found in type "ResourceDictionary"。同样，它不设置背景。我正在尝试在整个应用程序中设置背景，并可以选择使用 (App.Current.Resources["BackgroundImage"] as ImageBrush).ImageSource = imgSrc; 通过 c# 代码更改它。

<Application
    x:Class="MyApp.App"
    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">  
     <Application.Resources>
          <ResourceDictionary>
           <ResourceDictionary.ThemeDictionaries>
              <ResourceDictionary x:Key="Default">
                    <ImageBrush x:Key="BackgroundImage" ImageSource="Assets/BackgroundDefault.jpg" Stretch="UniformToFill" />
              </ResourceDictionary>
              <ResourceDictionary x:Key="Dark">
                    <ImageBrush x:Key="BackgroundImage" ImageSource="Assets/BackgroundDark.jpg" Stretch="UniformToFill" />
              </ResourceDictionary>
           </ResourceDictionary.ThemeDictionaries>
            <local:LocalizedStrings xmlns:local="clr-namespace:MyApp" x:Key="LocalizedStrings"/>
            <DataTemplate x:Key="SmallPanoramaTitle">
                <ContentPresenter>
                    <TextBlock Text="{Binding}" FontSize="25" Margin="0,30,0,0" />
                </ContentPresenter>
            </DataTemplate>
        </ResourceDictionary>
      </Application.Resources>
      <Application.ApplicationLifetimeObjects>
        <!--Required object that handles lifetime events for the application-->
        <shell:PhoneApplicationService
            Launching="Application_Launching" Closing="Application_Closing"
            Activated="Application_Activated" Deactivated="Application_Deactivated"/>
       </Application.ApplicationLifetimeObjects>
</Application>

Answer 1

ResourceDictionary.ThemeDictionaries 在 windows phone silverlight 应用程序中不可用。

您也可以使用 ThemeManager library to mange your themes in WP silverlight. This is an excellent library and its available in nuget。

请参阅 this 页面以了解如何使用 ThemeManager 。您还可以加载自定义主题文件

在类型 "ResourceDictionary" 中找不到可附加的属性 "ThemeDictionaries"

The attachable property "ThemeDictionaries" was not found in type "ResourceDictionary"

c#

xaml

windows-phone-8

resourcedictionary

app.xaml

在类型 "ResourceDictionary" 中找不到可附加的 属性 "ThemeDictionaries"

The attachable property "ThemeDictionaries" was not found in type "ResourceDictionary"

c#

xaml

windows-phone-8

resourcedictionary

app.xaml

在类型 "ResourceDictionary" 中找不到可附加的属性 "ThemeDictionaries"