我正在使用 C# 和 XAML 开发一个 Windows 8 应用程序。在我的 DataTemplate 中，我有 6 个在每个组之前自动生成的视图框。我需要指定在每个组之前生成哪一个。我不希望他们都出现在每个小组之前。我将提供屏幕截图和代码，以便更清晰。
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d:Source="{Binding AllGroups, Source={d:DesignInstance Type=data:DataSource, IsDesignTimeCreatable=True}}"/>
<DataTemplate x:Key="CustomTileItem">
<Grid>
<Grid HorizontalAlignment="Left">
<TextBox Text="{Binding Subtitle}" Width="300" Height="150" Background="Aqua"/>
<Border Background="{StaticResource ListViewItemPlaceholderBackgroundThemeBrush}">
<VariableSizedWrapGrid>
<Image Source="{Binding Path=Image}" Stretch="UniformToFill" />
</VariableSizedWrapGrid>
</Border>
<StackPanel VerticalAlignment="Bottom" Background="{StaticResource ListViewItemOverlayBackgroundThemeBrush}">
<telerikPrimitives:RadSlideHubTile Width="Auto" Height="38" telerikPrimitives:HubTileService.GroupTag="FirstLook" Visibility="Visible" Background="Transparent" BorderBrush="Transparent">
<telerikPrimitives:RadSlideHubTile.TopContent>
<TextBlock Text="{Binding Title}" Foreground="{StaticResource ListViewItemOverlayForegroundThemeBrush}" FontFamily="Seguo" FontSize="14" TextWrapping="Wrap" Height="35" Margin="10,5,10,0" VerticalAlignment="Center" />
</telerikPrimitives:RadSlideHubTile.TopContent>
<telerikPrimitives:RadSlideHubTile.BottomContent>
<TextBlock Text="{Binding Subtitle}" Foreground="{StaticResource ListViewItemOverlayForegroundThemeBrush}" FontFamily="Seguo" FontSize="14" TextWrapping="Wrap" Height="35" Margin="10,10,10,0" VerticalAlignment="Center" />
</telerikPrimitives:RadSlideHubTile.BottomContent>
</telerikPrimitives:RadSlideHubTile>
</StackPanel>
</Grid>
</Grid>
</DataTemplate>
<DataTemplate x:Key="ZoomedOut">
<Grid HorizontalAlignment="Left" >
<Border Background="LightGray">
<TextBlock Text="{Binding Group.Title}" Width="250" Height="Auto" Foreground="Black" Padding="25,20,25,20" FontWeight="Bold"/>
</Border>
</Grid>
</DataTemplate>
</UserControl.Resources>
<!--
This grid acts as a root panel for the page that defines two rows:
* Row 0 contains the back button and page title
* Row 1 contains the rest of the page layout -->
<Grid Background="WhiteSmoke">
<ProgressBar x:Name="pbProgress" IsIndeterminate="True" VerticalAlignment="Top" Value="100" Height="20"/>
<Grid Style="{StaticResource LayoutRootStyle}" Margin="0,20,0,0" x:Name="itemGrid">
<Grid.RowDefinitions>
<RowDefinition Height="140" />
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button x:Name="backButton" Click="GoBack" IsEnabled="{Binding Frame.CanGoBack, ElementName=Pageroot}" Style="{StaticResource BackButtonStyle}" Margin="36,0,0,36" Grid.Row="0"/>
<StackPanel x:Name="Header" Grid.Row="0" Grid.Column="1" >
<StackPanel Orientation="Horizontal">
<Image HorizontalAlignment="Left" Height="Auto" Margin="35,30,0,0" VerticalAlignment="Top" Width="202" Source="Assets/ACE-Logo.png"></Image>
</StackPanel>
</StackPanel>
</Grid>
<!-- Horizontal scrolling grid used in most view states -->
<SemanticZoom Name="Zoom" Grid.Row="1">
<SemanticZoom.ZoomedInView>
<local:HubItems
x:Name="itemGridView"
AutomationProperties.AutomationId="ItemGridView"
AutomationProperties.Name="Grouped Items"
Grid.Row="1"
Margin="0,-3,0,0"
Padding="116,0,40,20"
ItemsSource="{Binding Source={StaticResource groupedItemsViewSource}}"
ItemTemplate="{StaticResource CustomTileItem}"
SelectionMode="None"
IsItemClickEnabled="True"
ItemClick="ItemView_ItemClick">
<local:HubItems.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</local:HubItems.ItemsPanel>
<local:HubItems.GroupStyle>
<GroupStyle ContainerStyle="{StaticResource GroupItemStyle1}">
<GroupStyle.HeaderTemplate>
<DataTemplate>
<Grid Margin="0,0,0,6" x:Name="HeaderGrid">
<Button AutomationProperties.Name="Group Title" Content="{Binding Title}" Style="{StaticResource TextButtonStyle}"/>
</Grid>
</DataTemplate>
</GroupStyle.HeaderTemplate>
<GroupStyle.Panel>
<ItemsPanelTemplate>
<VariableSizedWrapGrid ItemWidth="75" ItemHeight="150" Orientation="Vertical" Margin="0,-420,80,0" MaximumRowsOrColumns="3"/>
</ItemsPanelTemplate>
</GroupStyle.Panel>
</GroupStyle>
</local:HubItems.GroupStyle>
</local:HubItems>
</SemanticZoom.ZoomedInView>
<SemanticZoom.ZoomedOutView>
<GridView x:Name="ZoomedOutGV" HorizontalAlignment="Left" Margin="-870,0,0,50"
ItemTemplate="{StaticResource ZoomedOut}">
<GridView.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Vertical" HorizontalAlignment="left"/>
</ItemsPanelTemplate>
</GridView.ItemsPanel>
</GridView>
</SemanticZoom.ZoomedOutView>
</SemanticZoom>