问题描述
我正在编写一个应用程序，我需要在整个行中按项目设置背景。我在中找到了一些灵感，但我不知道如何获得边框模板中的背景值（问题有点复杂：）
i am writing one app and i need to set background under entire row by items. I found some inspiration in here but i cannot get idea how to get Border background value in template (the problem is a bit more complicated:)
我的问题是在树形视图中有两种类型的数据（文件和文件夹）。用户可以在文件和文件夹下修改背景。
My problem is that in the treeview are 2 types of "data" (files and folders). User can modify the background under files and folders.
现在我在textblock上有背景，但它看起来很可怕，我想在整行中都有背景（我认为它看起来会好得多）。
Right now i have the background on textblock, but it seems horrible and i want to have the background over entire row (i think it will looks much better).
现在看来是这样：
Now it seems so:
但是我需要的是：
but what i need is:
如果我更改边框背景的值，则会（逻辑上）更改所有项目。因此，我想我确实需要使用textblock背景，但是我无法在整个行上进行扩展（拉伸不是解决方案，因为它只是将其扩展到行的末尾而不是之前的空白）。
If i change the value of the border background, i change all items (logically). So i guess i really need to work with the textblock background, but i cannot reach spreading over entire row (stretch is not a solution, because it spread it just to the end of the line but not that white space before).
谢谢您的建议。
编辑： XAML在这里：
EDIT : XAML in here:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:treeView">
<!-- TREEVIEW -->
<Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
<Setter Property="Focusable" Value="False"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Grid
Width="15"
Height="13"
Background="Transparent">
<!--<Path x:Name="ExpandPath"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Margin="1,1,1,1"
Fill="Red"
Data="M 4 0 L 8 4 L 4 8 Z"/>-->
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked"
Value="True">
<!--<Setter Property="Data"
TargetName="ExpandPath"
Value="M 0 4 L 8 4 L 4 8 Z"/>-->
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="TreeViewItemFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Border>
<Rectangle Margin="0,0,0,0"
StrokeThickness="5"
Stroke="Black"
StrokeDashArray="1 2"
Opacity="0"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="{x:Type TreeViewItem}" TargetType="{x:Type TreeViewItem}">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="HorizontalContentAlignment" Value="{Binding Path=HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="VerticalContentAlignment" Value="{Binding Path=VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="Padding" Value="1,0,0,0"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TreeViewItem}">
<ControlTemplate.Resources>
<local:LeftMarginMultiplierConverter Length="19" x:Key="lengthConverter" />
</ControlTemplate.Resources>
<StackPanel>
<Border x:Name="Bd"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}">
<Grid Margin="{Binding Converter={StaticResource lengthConverter}, RelativeSource={RelativeSource TemplatedParent}}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="19" />
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<ToggleButton Grid.Column="1" x:Name="Expander"
Style="{StaticResource ExpandCollapseToggleStyle}"
IsChecked="{Binding Path=IsExpanded,
RelativeSource={RelativeSource TemplatedParent}}"
ClickMode="Press"/>
<ContentPresenter x:Name="PART_Header" Grid.Column="1" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" ContentSource="Header" />
</Grid>
</Border>
<ItemsPresenter x:Name="ItemsHost" />
</StackPanel>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="false">
<Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter TargetName="Expander" Property="Visibility" Value="Hidden"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="HasHeader" Value="false"/>
<Condition Property="Width" Value="Auto"/>
</MultiTrigger.Conditions>
<Setter TargetName="PART_Header" Property="MinWidth" Value="75"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="HasHeader" Value="false"/>
<Condition Property="Height" Value="Auto"/>
</MultiTrigger.Conditions>
<Setter TargetName="PART_Header" Property="MinHeight" Value="19"/>
</MultiTrigger>
<Trigger Property="IsSelected" Value="true">
<Setter TargetName="Bd" Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="IsSelectionActive" Value="false"/>
</MultiTrigger.Conditions>
<Setter TargetName="Bd" Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
</MultiTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
推荐答案
使用snoop来了解您要尝试的视觉树修改。通过这种方式，将需要2-3分钟才能真正知道您需要修改的内容。 （google）
Use snoop to understand the visual tree you are trying to modify. This way it will take 2-3 minutes to actually know what you need to modify. ( google )
我敢打赌，您需要使用以下内容：
My bet is that you need to use something like this:
<TreeView>
<TreeView.ItemContainerStyle>
<Style BasedOn="{StaticResource {x:Type TreeViewItem}}" TargetType="TreeViewItem">
<Setter Property="Background" Value="Purple" />
</TreeView.ItemContainerStyle>
</TreeView>
如果要根据项目使用背景色，还需要添加触发器。
you will also need to add triggers if you want background colo depending on items.
这篇关于WPF树视图项目背景在整个行上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！