.net 在ScrollBarViewer的RepeatButton中使用背景图像不会'；不要显示图像

我正在尝试在WPF中创建自己的scrollviewer，除了RepeatButton中的背景图像外，它工作正常。如果我使用SolidColorBrush而不是ImageBrush，它可以正常工作。下面是我的xaml，我已经验证了ImageSource可以通过将它添加到滚动条的其他地方（特别是轨迹图像）来找到。你知道这是为什么吗？这张圆形的图像显示的很好

<Style x:Key="ScrollBarButtonStyle" TargetType="RepeatButton">
    <Setter Property="HorizontalContentAlignment" Value="Center"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="Width" Value="50"/>
    <Setter Property="Height" Value="50"/>        
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="RepeatButton">
                <Grid Name="ButtonBackground">
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ButtonBackground" Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <ImageBrush ImageSource="{DynamicResource ListItemBackgroundBttnNormal}"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Pressed">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ButtonBackground" Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <ImageBrush ImageSource ="{DynamicResource ListItemBackgroundBttnPressed}"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ButtonBackground" Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <ImageBrush ImageSource = "{DynamicResource ListItemBackgroundBttnDisabled}"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                    <DoubleAnimation Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="Opacity" From="1.0" To="0.5"/>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="MouseOver">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ButtonBackground" Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <ImageBrush ImageSource="{DynamicResource ListItemBackgroundBttnNormal}"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <ContentPresenter
                          x:Name="contentPresenter"
                          Content="{TemplateBinding Content}"
                          ContentTemplate="{TemplateBinding ContentTemplate}"
                          VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                          Margin="{TemplateBinding Padding}"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

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尝试将DynamicResource更改为StaticResource，看看它是否仍然有效。如果找不到路径，则DynamicSource不会显示任何错误，其中StaticResource不显示错误。我假设您的图像源在此上下文中是未知的。

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请确保您将资源添加到App.xaml的

谢谢，就是这样。我不得不将其添加到合并词典中。我不能只是把它作为资源添加。