[任何人都可以帮忙,我正在开发UWP应用,我希望TextBlock根据窗口宽度将文本包装在其中。该文本块位于TreeView内的Grid内。
现在,当我调整应用程序窗口的大小时,它什么也没做。
我希望它看起来像这样,并且没有固定的宽度,而是随窗口动态变化:
这是我的XAML代码:
<TreeView Name="ItemsTreeView" SelectionMode="Multiple" ItemsSource="{x:Bind DataSource}" CanReorderItems="False" CanDrag="False" CanDragItems="False" AllowDrop="False" Margin="0,40,0,0">
<TreeView.ItemTemplate>
<DataTemplate x:DataType="local:Item">
<TreeViewItem ItemsSource="{x:Bind Children}" Background="{ThemeResource SystemAltMediumLowColor}" HorizontalAlignment="Stretch">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Image Source="{Binding Image}" Grid.Column="0" Margin="0 5 10 5" Width="50" Height="40"></Image>
<TextBlock Text="{Binding Name}" Grid.Column="1" VerticalAlignment="Center" Width="500" TextWrapping="Wrap"/>
</Grid>
</TreeViewItem>
</DataTemplate>
</TreeView.ItemTemplate>
</TreeView>
如果要包装TextBlock并随窗口动态更改,则需要修改TreeViewItem的样式。在TreeViewItem的样式中,它使用StackPanel作为父面板,其宽度基于子控件。因此,我们需要将StackPanel更改为Grid,并在Grid中添加一个三列布局(Grid的名称为“ MultiSelectGrid”),如下所示。对于原始的完整样式,可以从generic.xaml复制它。
<Page.Resources>
<Style TargetType="TreeViewItem" BasedOn="{StaticResource ListViewItemRevealStyle}" x:Key="MyTreeViewItemStyle">
<Setter Property="Padding" Value="0" />
......
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeViewItem">
<Grid x:Name="ContentPresenterGrid" Margin="0,0,0,0" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}">
<VisualStateManager.VisualStateGroups>
......
</VisualStateManager.VisualStateGroups>
<Grid x:Name="MultiSelectGrid">
<Grid VerticalAlignment="Stretch" ......>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"></ColumnDefinition>
<ColumnDefinition Width="Auto"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid>
<Grid.Resources>
......
</Grid.Resources>
......
</Grid>
<Grid x:Name="ExpandCollapseChevron" Grid.Column="1"
Padding="12,0,12,0"
Width="Auto"
Opacity="{TemplateBinding GlyphOpacity}"
Background="Transparent">
......
</Grid >
<ContentPresenter Grid.Column="2" x:Name="ContentPresenter"
ContentTransitions="{TemplateBinding ContentTransitions}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Content="{TemplateBinding Content}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding Padding}" />
</Grid>
</Grid>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
用法:
。xaml:
......
<DataTemplate x:DataType="local:ItemTemplate">
<TreeViewItem Style="{StaticResource MyTreeViewItemStyle}" ItemsSource="{x:Bind Children}" Margin="0" Background="{ThemeResource SystemAltMediumLowColor}" HorizontalAlignment="Stretch">
......
</TreeViewItem>
</DataTemplate>
......