Silverlight TabItem内容未滚动

Question

我有这个XAML，我曾试图让TabItem内容滚动（但没有成功）。

<ex:TabControl>
  <ex:TabItem Header="General">
    <ContentPresenter Content="{Binding }" ContentTemplate="{StaticResource tabMenuItem}" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto" />
  </ex:TabItem>
  <ex:TabItem Header="Prices (Item)">
    <ScrollViewer VerticalScrollBarVisibility="Visible" HorizontalScrollBarVisibility="Auto">
      <ContentPresenter Content="{Binding NonModifierPricesView}" ContentTemplate="{StaticResource tabMenuItemPrices}" />
    </ScrollViewer>
  </ex:TabItem>
</ex:TabControl>

当我的TabControl被调整大小，使得TabItem太小而无法显示所有内容时，不会显示滚动条。我做错什么了吗？

编辑：为tabMenuItemPrices 请求XAML

<DataTemplate x:Key="tabMenuItemPrices">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="1*" />
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="1*" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="1*" />
                </Grid.ColumnDefinitions>
                <TextBlock Text="Prices (in order of priority)" />
                <Grid Grid.Row="1">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="40"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="1*" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <ListBox HorizontalAlignment="Stretch" Margin="{StaticResource DefaultMargin}" x:Name="lstMenuItemPrices" SelectionMode="Single"
                             ItemsSource="{Binding }" ItemTemplate="{StaticResource MenuItemPriceDataTemplate}" Height="140" >
                        <i:Interaction.Triggers>
                            <i:EventTrigger EventName="SelectionChanged">
                                <cmd:EventToCommand Command="{Binding DataContext.UpdateSelectedTaxGroupsCommand, ElementName=Editor}" CommandParameter="{Binding SelectedItem, ElementName=lstMenuItemPrices}" />
                            </i:EventTrigger>
                        </i:Interaction.Triggers>
                    </ListBox>
                    <StackPanel VerticalAlignment="Center" Grid.Column="1" >
                        <Button  Content="Move Up" HorizontalAlignment="Center" Margin="2" IsEnabled="{Binding SelectedIndex, Converter={StaticResource MinimumIntegerToBooleanConverter}, ConverterParameter=0, ElementName=lstMenuItemPrices, Mode=OneWay}" />
                        <Button  Content="Move Down" HorizontalAlignment="Center" Margin="2" IsEnabled="{Binding SelectedIndex, Converter={StaticResource MinimumIntegerToBooleanConverter}, ConverterParameter=0, ElementName=lstMenuItemPrices, Mode=OneWay}" />
                    </StackPanel>
                    <StackPanel Orientation="Horizontal" Grid.Row="1" Grid.ColumnSpan="2">
                        <Button HorizontalAlignment="Left" Margin="2" Content="New Price" Command="{Binding DataContext.AddPriceCommand, ElementName=Editor}" />
                        <Button Content="Remove Price" HorizontalAlignment="Left" Margin="2" Command="{Binding DataContext.RemovePriceCommand, ElementName=Editor}" CommandParameter="{Binding SelectedItem, ElementName=lstMenuItemPrices}"
                                IsEnabled="{Binding SelectedIndex, Converter={StaticResource MinimumIntegerToBooleanConverter}, ConverterParameter=0, ElementName=lstMenuItemPrices, Mode=OneWay}"/>
                    </StackPanel>
                </Grid>
                <TextBlock Text="Selected Price" Grid.Row="2" />
                <Grid Grid.Row="3">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="1*"/>
                        <ColumnDefinition Width="1*"/>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <CheckBox Content="Amount Includes Tax" d:LayoutOverrides="Width, Height" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" 
                                          IsChecked="{Binding SelectedItem.DTO.AmountIncludesTax, Mode=TwoWay, ElementName=lstMenuItemPrices}" Grid.ColumnSpan="3"/>
                    <TextBlock HorizontalAlignment="Right" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Text="Amount" Grid.Row="1"/>
                    <TextBlock Text="Cost" d:LayoutOverrides="Width, Height, GridBox" HorizontalAlignment="Right" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Grid.Row="2"/>
                    <TextBlock HorizontalAlignment="Right" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Text="Points" Grid.Row="3"/>
                    <TextBlock HorizontalAlignment="Right" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Text="Interface ID" Grid.Row="4"/>
                    <TextBox VerticalAlignment="Center" Grid.Row="1" Grid.Column="1" Margin="{StaticResource DefaultMargin}"
                                     Text="{Binding SelectedItem.DTO.Amount, Mode=TwoWay, ElementName=lstMenuItemPrices, Converter={StaticResource DecimalToMoneyStringConverter}}" />
                    <CheckBox Content="Open" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Grid.Row="1" Grid.Column="2"
                                      IsChecked="{Binding SelectedItem.DTO.IsOpenAmount, Mode=TwoWay, ElementName=lstMenuItemPrices}"/>
                    <TextBox Text="{Binding SelectedItem.DTO.Cost, Converter={StaticResource DecimalToMoneyStringConverter}, Mode=TwoWay, ElementName=lstMenuItemPrices}" TextWrapping="Wrap" 
                                     Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" d:LayoutOverrides="GridBox" Grid.Column="1" Grid.Row="2"/>
                    <CheckBox Content="Inherit" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Grid.Column="2" Grid.Row="2"
                                      IsChecked="{Binding SelectedItem.DTO.CostOverride, Converter={StaticResource CostToBooleanConverter}, Mode=TwoWay, ElementName=lstMenuItemPrices}" />
                    <TextBox Text="{Binding SelectedItem.DTO.PointsEarned, Converter={StaticResource IntegerToStringConverter}, Mode=TwoWay, ElementName=lstMenuItemPrices}" TextWrapping="Wrap" 
                                     Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Grid.Column="1" Grid.Row="3"
                                     IsEnabled="{Binding SelectedItem.DTO.PointsEarnedInherited, Converter={StaticResource ReverseBooleanConverter}, ElementName=lstMenuItemPrices}"/>
                    <CheckBox Content="Inherit" Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Grid.Column="2" Grid.Row="3"
                                      IsChecked="{Binding SelectedItem.DTO.InheritPointsEarned, Mode=TwoWay, ElementName=lstMenuItemPrices}" />
                    <TextBox Margin="{StaticResource DefaultMargin}" Grid.Column="1" Grid.Row="4"
                                     Text="{Binding SelectedItem.DTO.InterfaceID, Mode=TwoWay, ElementName=lstMenuItemPrices}" />
                    <CheckBox Margin="{StaticResource DefaultMargin}" VerticalAlignment="Center" Content="Inherit tax from class" HorizontalAlignment="Left" 
                                      IsChecked="{Binding SelectedItem.DTO.InheritTaxes, Mode=TwoWay, ElementName=lstMenuItemPrices}" Grid.Row="5" Grid.ColumnSpan="3" />
                    <ListBox Margin="{StaticResource DefaultMargin}" Grid.Row="6" Grid.ColumnSpan="3" SelectionMode="Multiple" ItemsSource="{Binding DataContext.Repository.TaxGroups, ElementName=Editor}"
                                     IsEnabled="{Binding SelectedItem.DTO.InheritTaxes, Converter={StaticResource BooleanToEnabledConverter}, ElementName=lstMenuItemPrices, ConverterParameter=false}">
                        <ListBox.ItemContainerStyle>
                            <Style TargetType="ListBoxItem" >
                                <Setter Property="Margin" Value="2, 2, 2, 0" />
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="ListBoxItem">
                                            <Border Background="Transparent">
                                                <CheckBox IsChecked="{Binding Path=IsSelected, Mode=TwoWay}"
                                                        Content="{Binding DTO.Name}" Padding="5,0,10,0" >
                                                    <i:Interaction.Triggers>
                                                        <i:EventTrigger EventName="Checked">
                                                            <cmd:EventToCommand Command="{Binding SelectedItem.AddTaxGroupCommand, ElementName=lstMenuItemPrices}" CommandParameter="{Binding DTO.ID}" />
                                                        </i:EventTrigger>
                                                        <i:EventTrigger EventName="Unchecked">
                                                            <cmd:EventToCommand Command="{Binding SelectedItem.RemoveTaxGroupCommand, ElementName=lstMenuItemPrices}" CommandParameter="{Binding DTO.ID}" />
                                                        </i:EventTrigger>
                                                    </i:Interaction.Triggers>
                                                </CheckBox>
                                            </Border>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                            </Style>
                        </ListBox.ItemContainerStyle>
                    </ListBox>
                </Grid>
            </Grid>
        </DataTemplate>

Answer 1

ScrollViewer的子级需要管理自己的高度和宽度。ContentTemplate中最外层的网格没有指定HorizontalAlignment或VerticalAlignment，因此它默认为拉伸值。。。您可以尝试将对齐设置为左侧和顶部，如下所示：

<Grid HorizontalAlignment="Left" VerticalAlignment="Top">

底线是，控件模板中最外层的容器必须将其高度和宽度设置为其内容，而不是父容器。