wpf 根据数据更改所选 ListBox 项的背景/突出显示颜色
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Change background/highlight-color of selected ListBox item based on data
提问by Robert Massa
I want to change the background/hightlight color of a selectedListBox item using data binding. This is what I have and tried, but it's not working. I'm not sure how to get the resources section to have the "current item" context.
我想使用数据绑定更改所选ListBox 项目的背景/突出显示颜色。这是我已经尝试过的，但它不起作用。我不确定如何让资源部分具有“当前项目”上下文。
Color is a property on every item displayed (and has a different value for each item).
颜色是显示的每个项目的属性（每个项目都有不同的值）。
<ListBox x:Name="Categorie" ItemsSource="{Binding Categories}" IsSynchronizedWithCurrentItem="True">
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Style.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="{Binding /Color}" />
</Style.Resources>
</Style>
</ListBox.ItemContainerStyle>
<ListBox.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="{Binding /Color}" />
</ListBox.Resources>
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" HorizontalAlignment="Center"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
采纳答案by AsitK
another work around can be to set the background using your color property and setting the HightlightBrushKey to Transparent.
另一种解决方法是使用您的颜色属性设置背景并将 HightlightBrushKey 设置为透明。
回答by Sheridan
You can use a Triggerto achieve that:
您可以使用 aTrigger来实现：
<Style TargetType="ListBoxItem">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background">
<Setter.Value>
<SolidColorBrush Color="{Binding Color}" />
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
Note that for this binding to work, you musthave a property called Coloron the data item objects that are set as the ListBox.ItemsSource.
请注意，此绑定工作，你必须有一个叫做财产Color上被设置为数据项的对象ListBox.ItemsSource。
UPDATE >>>
更新 >>>
Ok, so that was my bad... I forgot that SolidColorBrushis not a FrameworkElementand is Freezable, so they cannot be used in a Binding... you have a few options:
好吧，那是我的错...我忘记了它SolidColorBrush不是 aFrameworkElement和 is Freezable，所以它们不能用于 a Binding......你有几个选择：
Either create your colour(s) as StaticResourceobject(s):
要么将您的颜色创建为StaticResource对象：
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{StaticResource Color}" />
</Trigger>
Or you could bind the Backgroundproperty to the Colorobject using a Converterof some kind:
或者您可以使用某种类型将Background属性绑定到Color对象Converter：
<Style TargetType="ListBoxItem" Background="{Binding Color, Converter={StaticResource
SomeColourConverter}}" />
