在UserControl中引用Parent的ResourceDictionary

Question

我有一个WPF UserControls库和一个在库中共享的ResourceDictionary.

此库中的所有UserControl仅出现在单个"shell"父控件中,该控件实际上只是一组较小控件的容器.当我添加以下XAML时,我能够按预期从我的shell控件访问ResourceDictionary

<Control.Resources>
    <ResourceDictionary Source="MyResources.xaml" />
</Control.Resources>

但是,我无法从位于"shell"控件内的子控件访问ResourceDictionary.

我的印象是WPF应该在本地检查资源,然后向上遍历,直到找到适当的资源？

相反,我得到了

Cannot find resource named '{BoolInverterConverter}'. 
Resource names are case sensitive.  Error at    
    object 'System.Windows.Data.Binding' in markup file...

显然,我可以(并且)在我的子控件中引用ResourceDictionary; 但现在每个控件都需要引用这个字典,我相信这不是必需的.

任何想法,我做的事情是奇怪的还是我对行为的期望不正确？

Answer 1

这里描述的是什么,虽然文档有点不透明.如果在未指定键ResourceDictionary的Resources情况下向元素的属性添加,则WPF期望您合并资源字典,并使用其MergedDictionaries属性中的字典内容填充字典.它忽略了ResourceDictionary没有键的实际内容.

所以你想要做的是:

<Control.Resources>
   <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="MyResources.xaml"/>
      </ResourceDictionary.MergedDictionaries>
   </ResourceDictionary>
</Control.Resources>

编辑:

一个工作的例子:

MainWindow.xaml:

<Window x:Class="MergedDictionariesDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:MergedDictionariesDemo="clr-namespace:MergedDictionariesDemo" Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Dictionary1.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Window.Resources>
    <Grid>
        <MergedDictionariesDemo:UserControl1 />
    </Grid>
</Window>

Dictionary1.xaml:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <SolidColorBrush x:Key="UCBrush"
                     Color="Bisque" />
</ResourceDictionary>

UserControl1.xaml:

<UserControl x:Class="MergedDictionariesDemo.UserControl1"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Border Margin="10" BorderBrush="Navy" BorderThickness="1" CornerRadius="10">
        <TextBlock Margin="10"
                   Background="{DynamicResource UCBrush}">
            The background of this is set by the resource UCBrush.
        </TextBlock>

    </Border>
</UserControl>