无法在app.xaml中找到MergedDictionaries

Question

我创建了一个WPF应用程序（名为“Ferhad.Wpf”）。 然后我在解决方案中添加了两个名为“Ferhad.Wpf.Core”和“Ferhad.Wpf.SystemStyles”的类库。

“Ferhad.Wpf.Core”中只有“Resources.xaml”。

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <SolidColorBrush x:Key="Foreground" Color="#FFFFFF" />
    <SolidColorBrush x:Key="BackgroundNormal" Color="#3F3F46" />
    <SolidColorBrush x:Key="BorderBrushNormal" Color="#54545C" />
    <SolidColorBrush x:Key="BorderBrushHighlighted" Color="#6A6A75" />
</ResourceDictionary>

但是“Ferhad.Wpf.SystemStyles”中也有“ButtonStyles.xaml”和“Styles.xaml”。 这是“ButtonStyles.xaml”：

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="pack://application:,,,/Ferhad.Wpf.Core;component/Resources.xaml" />
    </ResourceDictionary.MergedDictionaries>
    <Style x:Key="StandartButton" TargetType="Button">
        <Setter Property="Visibility" Value="Visible" />
        <Setter Property="Foreground" Value="{StaticResource Foreground}" />
        <Setter Property="Background" Value="{StaticResource BackgroundNormal}" />
        <Setter Property="BorderBrush" Value="{StaticResource BorderBrushNormal}" />
    </Style>
</ResourceDictionary>

和“Styles.xaml”：

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="ButtonStyles.xaml" />
    </ResourceDictionary.MergedDictionaries>

    <Style TargetType="Button" BasedOn="{StaticResource StandartButton}" />
</ResourceDictionary>

这是app.xaml：

<Application x:Class="Ferhad.Wpf.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/Ferhad.Wpf.SystemStyles;component/Styles.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

在MainWindow.xaml的设计时，一切似乎都很好，但是在运行应用程序时会抛出异常： Set property 'System.Windows.ResourceDictionary.Source' threw an exception.

我用谷歌搜索过，但没有任何帮助。 我试图更改文件的BuildAction，但这也没有帮助。

更新：

例外是行号'8'和行位置'18'。

内部异常是： {"Could not load file or assembly 'Ferhad.Wpf.SystemStyles, Culture=neutral' or one of its dependencies. The system cannot find the file specified.":"Ferhad.Wpf.SystemStyles, Culture=neutral"}

Answer 1

您可能忘记添加从App到Core的引用， SystemStyles需要Core因此如果构建过程仅复制SystemStyles则它没有Core程序集。

App
-> SystemStyles
-> Core

SystemStyles
-> Core //Not strictly necessary because the build process does not copy the 
        //reference to the App project anyway and the resources
        //are not resolved at compile-time

Core
-

Answer 2

尝试改变这个

    <ResourceDictionary Source="ButtonStyles.xaml" />

至

  <ResourceDictionary Source="pack://application:,,,/Ferhad.Wpf.SystemStyles;component/ButtonStyles.xaml" />