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私は階層データを持つDataGridを持っています。行の詳細を折りたたむと、親行は自動的にサイズ変更されません。これは最終的には、行の詳細を拡張し続けると、親グリッドは同じレベルで行を折りたたむまで、より多くの領域を使い続けていることを意味します。私はアプリケーションをスヌープし、新しい高さを保持する最も低いレベルの要素がPART_ColumnHeadersPresenterであるDataGridRowsPresenterであることを発見しました。WPF DataGrid行を展開した後に高さを調整しない行の詳細
私は行とグリッドのための私自身のControlTemplateを持っている：
<Style x:Key="{x:Type Custom:DataGrid}" TargetType="{x:Type Custom:DataGrid}">
<Setter Property="CanUserResizeRows" Value="False" />
<Setter Property="Background"
Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="BorderBrush" Value="#FF688CAF" />
<Setter Property="BorderThickness" Value="1" />
<!-- This is needed to force DG to have a non-default value. Otherwise the DGR.DetailsVisibility cannot have a value of VisibleWhenSelected by default. -->
<Setter Property="RowDetailsVisibilityMode" Value="VisibleWhenSelected" />
<Setter Property="ScrollViewer.CanContentScroll"
Value="true"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Custom:DataGrid}">
<Border Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
SnapsToDevicePixels="True"
Padding="{TemplateBinding Padding}">
<ScrollViewer Focusable="false"
Name="DG_ScrollViewer">
<ScrollViewer.Template>
<ControlTemplate TargetType="{x:Type ScrollViewer}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<!--Left Column Header Corner -->
<Button Command="{x:Static Custom:DataGrid.SelectAllCommand}"
Width="{Binding RelativeSource={RelativeSource AncestorType={x:Type Custom:DataGrid}}, Path=CellsPanelHorizontalOffset}"
Template="{StaticResource SelectAllButtonTemplate}"
Focusable="false"
Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type Custom:DataGrid}}, Path=HeadersVisibility, Converter={x:Static Custom:DataGrid.HeadersVisibilityConverter}, ConverterParameter={x:Static Custom:DataGridHeadersVisibility.All}}" />
<!--Column Headers-->
<Custom:DataGridColumnHeadersPresenter Grid.Column="1"
Name="PART_ColumnHeadersPresenter"
Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type Custom:DataGrid}}, Path=HeadersVisibility, Converter={x:Static Custom:DataGrid.HeadersVisibilityConverter}, ConverterParameter={x:Static Custom:DataGridHeadersVisibility.Column}}"/>
<!--DataGrid content-->
<ScrollContentPresenter x:Name="PART_ScrollContentPresenter"
Grid.Row="1"
Grid.ColumnSpan="2"
CanContentScroll="{TemplateBinding CanContentScroll}"
Height="Auto" VerticalAlignment="Stretch">
</ScrollContentPresenter>
<ScrollBar Grid.Row="1" Grid.Column="2" Name="PART_VerticalScrollBar"
Orientation="Vertical"
Maximum="{TemplateBinding ScrollableHeight}"
ViewportSize="{TemplateBinding ViewportHeight}"
Value="{Binding Path=VerticalOffset, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"
Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"/>
<Grid Grid.Row="2" Grid.Column="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="{Binding RelativeSource={RelativeSource AncestorType={x:Type Custom:DataGrid}}, Path=NonFrozenColumnsViewportHorizontalOffset}"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<ScrollBar Grid.Column="1"
Name="PART_HorizontalScrollBar"
Orientation="Horizontal"
Maximum="{TemplateBinding ScrollableWidth}"
ViewportSize="{TemplateBinding ViewportWidth}"
Value="{Binding Path=HorizontalOffset, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"
Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"/>
</Grid>
</Grid>
</ControlTemplate>
</ScrollViewer.Template>
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</ScrollViewer>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
</Style.Triggers>
</Style>
<ControlTemplate x:Key="PlainDataGridRowControlTemplate" TargetType="{x:Type Custom:DataGridRow}">
<Grid x:Name="LayoutRoot">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid x:Name="DGR_Border"
Background="Transparent"
SnapsToDevicePixels="True">
<Custom:SelectiveScrollingGrid Name="DGR_SelectiveScrollingGrid">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Custom:DataGridCellsPresenter Grid.Column="1" Name="DGR_CellsPresenter" ItemsPanel="{TemplateBinding ItemsPanel}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
<Custom:DataGridDetailsPresenter Height="Auto"
Grid.Column="1"
Grid.Row="1"
Visibility="{TemplateBinding DetailsVisibility}" Custom:SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding RelativeSource={RelativeSource AncestorType={x:Type Custom:DataGrid}}, Path=AreRowDetailsFrozen, Converter={x:Static Custom:DataGrid.RowDetailsScrollingConverter}, ConverterParameter={x:Static Custom:SelectiveScrollingOrientation.Vertical}}" />
<!--<localprimitives:DataGridRowHeader localprimitives:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:DataGrid}}, Path=HeadersVisibility, Converter={x:Static local:DataGrid.HeadersVisibilityConverter}, ConverterParameter={x:Static local:DataGridHeadersVisibility.Row}}"/>-->
<Custom:DataGridRowHeader Grid.RowSpan="2" Custom:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" />
</Custom:SelectiveScrollingGrid>
</Grid>
</Grid>
</ControlTemplate>
<Style TargetType="Custom:DataGridRow">
<Setter Property="Margin" Value="0, 0, 0, 0"/>
<Setter Property="Template" Value="{StaticResource PlainDataGridRowControlTemplate}" />
</Style>
誰かが助言していただけますか？