wpf - 在 WPF 中，如何为我的自定义控件提供在设计模式中使用的默认样式？

Question

我已经创建了一个自定义 WPF 控件。该控件充当具有多个区域的容器(因此它可以像母版页一样工作)。

此控件的样式在运行时从单独的资源字典中加载，如下所示:

<Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/MyApp.Application;component/Themes/Theme.xaml" x:Name="theme"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>

我的自定义控件的样式如下所示...

<Style TargetType="{x:Type shareduc:EditControlMaster}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type shareduc:EditControlMaster}">
                <Grid>
                    <Grid.ColumnDefinitions></Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="auto"></RowDefinition>
                        <RowDefinition Height="*"></RowDefinition>
                    </Grid.RowDefinitions>

                    <Border BorderBrush="{DynamicResource xxBorderBrush}" 
                                BorderThickness="0,1,0,1" Background="White" Grid.Row="0">
                        <Grid >
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="auto"></ColumnDefinition>
                                <ColumnDefinition Width="*"></ColumnDefinition>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="auto"></RowDefinition>
                                <RowDefinition Height="auto"></RowDefinition>
                            </Grid.RowDefinitions>

                            <ContentPresenter Grid.Row="0" Grid.Column="0" Grid.RowSpan="2" Margin="10" Content="{TemplateBinding Image}"  />
                            <ContentPresenter Grid.Row="0" Grid.Column="1" Margin="2" Content="{TemplateBinding Title}"  />
                            <ContentPresenter Grid.Row="1" Grid.Column="1" Margin="2" Content="{TemplateBinding Abstract}"  />
                        </Grid>
                    </Border>

                    <ContentPresenter Grid.Row="1" Margin="2" Content="{TemplateBinding Content}" />

                </Grid>

            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

问题是这个样式只在运行时加载。所以在设计模式下，我的控件没有任何样式，也没有任何大小或布局。如何为我的控件提供设计模式的默认样式？

更新:我正在取得一些进展...看来我可以指定一个默认主题以在名为 Themes\Generic.xaml 的文件中使用。这在一个小示例项目中工作正常，但由于某种原因，当我在我的实际项目中做同样的事情时，我的 VS2008 设计器保持空白...帮助？ :(

请注意，我的自定义控件的代码如下所示:

public partial class EditControlMaster : Control
    {
        static EditControlMaster()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(EditControlMaster),
              new FrameworkPropertyMetadata(typeof(EditControlMaster)));
        }

        public object Title
        {
            get { return (object)GetValue(TitleProperty); }
            set { SetValue(TitleProperty, value); }
        }

        public static readonly DependencyProperty TitleProperty =
          DependencyProperty.Register("Title", typeof(object),
          typeof(EditControlMaster), new UIPropertyMetadata());



        public object Image
        {
            get { return (object)GetValue(ImageProperty); }
            set { SetValue(ImageProperty, value); }
        }

        public static readonly DependencyProperty ImageProperty =
          DependencyProperty.Register("Image", typeof(object),
          typeof(EditControlMaster), new UIPropertyMetadata());


        public object Abstract
        {
            get { return (object)GetValue(AbstractProperty); }
            set { SetValue(AbstractProperty, value); }
        }

        public static readonly DependencyProperty AbstractProperty =
          DependencyProperty.Register("Abstract", typeof(object),
          typeof(EditControlMaster), new UIPropertyMetadata());

        public object Content
        {
            get { return (object)GetValue(ContentProperty); }
            set { SetValue(ContentProperty, value); }
        }

        public static readonly DependencyProperty ContentProperty =
          DependencyProperty.Register("Content", typeof(object),
          typeof(EditControlMaster), new UIPropertyMetadata());
    }

Answer 1

通过大量查看项目文件，我发现了问题所在!

1. Themes\Generic.xaml 包含控件的默认样式。这很好。

2. 您的 Assembly.cs 文件需要包含以下属性:

   [assembly: ThemeInfo(
       ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
       //(used if a resource is not found in the page, 
       // or application resource dictionaries)
       ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
       //(used if a resource is not found in the page, 
       // app, or any theme specific resource dictionaries)
   )]
   

瞧! VS2008 设计器工作!