我有一個列表框,在一個網格內的擴展器。 ListBox綁定到IList。擴展器,網格和列表框=沒有虛擬化
當我第一次展開Expander控件時,ListBox將處理IList中的所有項目(可以是數千個),而不是僅處理屏幕上可見的項目。
但是,如果我修復了ListBox控件的高度,它的行爲與預期相同,只能訪問IList中可見的那些項目。
實際上,虛擬化不起作用,儘管我認爲這與ListBox無法在內容項準備時確定高度有關。
的XAML基本如下(一些東西,爲了簡化刪除)...
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Expander ExpandDirection="Right"
Grid.Column="0"
Grid.Row="0"
Grid.RowSpan="2"
Header="Documents"
IsExpanded="False">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid Grid.Row="0">
<Grid.RowDefinitions>
<RowDefinition Height="50" />
</Grid.RowDefinitions>
</Grid>
<ListBox Name="listBox"
Grid.Row="1"
ItemsSource="{Binding Path=Items}"
SelectedIndex="{Binding Path=SelectedIndex}"
SelectedItem="{Binding Path=SelectedItem}"
SelectionMode="Single"
Width="250">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<TextBlock Grid.Column="0"
Style="{StaticResource prompt}">
<TextBlock.Text>
<MultiBinding StringFormat="{}{0}{1:00000}">
<Binding Path="..."
FallbackValue="0" />
<Binding Path="..." />
</MultiBinding>
</TextBlock.Text></TextBlock>
<TextBlock Grid.Column="1"
Style="{StaticResource prompt}">
<TextBlock.Text>
<Binding Path="ItemCount"
StringFormat="{}{0} Items"
FallbackValue="" />
</TextBlock.Text></TextBlock>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</Expander>
<v:DocumentView x:Name="documentView"
Grid.Column="1"
Grid.Row="0"
DocumentID="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type v:BatchView}}, Path=ViewModel.SelectedItem.ID}"
IsActive="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type v:BatchView}}, Path=IsActive}" />
<StackPanel Grid.Column="1"
Grid.Row="1"
Style="{StaticResource buttonStackStyle}">
<Button Command="{Binding Path=PreviousCommand}"
Style="{StaticResource previousButtonStyle}" />
<Button Command="{Binding Path=NextCommand}"
Style="{StaticResource nextButtonStyle}" />
</StackPanel>
</Grid>
任何人都可以建議我怎麼可能會在列表框的高度設置爲Grid.Row父的的ActualHeight?或者,任何人都可以提供更好的解決方案嗎?
謝謝。