WPF中修改ListBox样式后,虚拟化失效...

Question

修改了ListBox滚动条的样式,修改后虚拟化就失效了.
本来想先看下ListBox滚动条的默认样式;
在这里先看看有大侠知道怎么解决不?

Answer 1

样式代码,修改了滚动条的样式<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <SolidColorBrush x:Key="StandardBorderBrush" Color="#888" />
    <SolidColorBrush x:Key="StandardBackgroundBrush" Color="#FFF" />
    <SolidColorBrush x:Key="HoverBorderBrush" Color="#DDD" />
    <SolidColorBrush x:Key="SelectedBackgroundBrush" Color="Gray" />
    <SolidColorBrush x:Key="SelectedForegroundBrush" Color="White" />
    <SolidColorBrush x:Key="DisabledForegroundBrush" Color="#888" />
    <SolidColorBrush x:Key="NormalBrush" Color="#888" />
    <SolidColorBrush x:Key="NormalBorderBrush" Color="#888" />
    <SolidColorBrush x:Key="HorizontalNormalBrush" Color="#888" />
    <SolidColorBrush x:Key="HorizontalNormalBorderBrush" Color="#888" />    <Style x:Key="stBackBorder" TargetType="Border">
        <Setter Property="BorderBrush" Value="#909090"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Background" Value="#909090"/>
        <Setter Property="CornerRadius" Value="1"/>
    </Style>
    <LinearGradientBrush x:Key="ListBoxBackgroundBrush"
            StartPoint="0,0" EndPoint="1,0.001">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="White" Offset="0.0" />
                <GradientStop Color="White" Offset="0.6" />
                <GradientStop Color="#DDDDDD" Offset="1.2"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="StandardBrush"
            StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#FFF" Offset="0.0"/>
                <GradientStop Color="#CCC" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <SolidColorBrush x:Key="GlyphBrush" Color="#444" />
    <LinearGradientBrush x:Key="PressedBrush"
            StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#BBB" Offset="0.0"/>
                <GradientStop Color="#EEE" Offset="0.1"/>
                <GradientStop Color="#EEE" Offset="0.9"/>
                <GradientStop Color="#FFF" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>    <Style x:Key="ScrollBarLineButton" TargetType="{x:Type RepeatButton}">
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="OverridesDefaultStyle" Value="true"/>
        <Setter Property="Focusable" Value="false"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type RepeatButton}">
                    <Border
          Name="Border"
          Margin="1"
          CornerRadius="2"
          Background="{StaticResource NormalBrush}"
          BorderBrush="{StaticResource NormalBorderBrush}"
          BorderThickness="1">
                        <Path
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Fill="{StaticResource GlyphBrush}"
            Data="{Binding Path=Content,
                RelativeSource={RelativeSource TemplatedParent}}" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsPressed" Value="true">
                            <Setter TargetName="Border" Property="Background"
                                Value="{StaticResource PressedBrush}" />
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground"
                                Value="{StaticResource DisabledForegroundBrush}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>    <Style x:Key="ScrollBarPageButton" TargetType="{x:Type RepeatButton}">
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="OverridesDefaultStyle" Value="true"/>
        <Setter Property="IsTabStop" Value="false"/>
        <Setter Property="Focusable" Value="false"/>        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type RepeatButton}">                    <Border Background="#caa948" />                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>    <Style x:Key="ScrollBottomBarPageButton" TargetType="{x:Type RepeatButton}">
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="OverridesDefaultStyle" Value="true"/>
        <Setter Property="IsTabStop" Value="false"/>
        <Setter Property="Focusable" Value="false"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type RepeatButton}">
                    <Border Background="#909090" />
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>    <!--设置中间滚动条-->
    <Style x:Key="ScrollBarThumb" TargetType="{x:Type Thumb}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="OverridesDefaultStyle" Value="True"/>
        <Setter Property="IsTabStop" Value="false"/>
        <Setter Property="Focusable" Value="false"/>
        <Setter Property="Width" Value="11"/>
        <Setter Property="Height" Value="Auto"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Thumb}">
                    <Border>
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition  Height="*" MaxHeight="11"/>
                                <RowDefinition  Height="*"/>
                                <RowDefinition  Height="*" MaxHeight="11"/>
                            </Grid.RowDefinitions>
                            <Border Grid.Row="0">
                                <!--头部图片-->
                                <Border.Background>
                                    <ImageBrush ImageSource="/WPF.TControls;component/Images/rolltop.png"/>
                                </Border.Background>
                            </Border>
                            <Border Grid.Row="1">
                                <!--中间图片，设置成自动拉长-->
                                <Border.Background>
                                    <ImageBrush ImageSource="/WPF.TControls;component/Images/rollback.png"  TileMode="FlipY"  />
                                </Border.Background>
                            </Border>
                            <Border Grid.Row="2">
                                <!--底部图片-->
                                <Border.Background>
                                    <ImageBrush ImageSource="/WPF.TControls;component/Images/rollbottom.png"/>
                                </Border.Background>
                            </Border>
                        </Grid>
                    </Border>
                    <!--"{TemplateBinding Background}"-->
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>    <ControlTemplate x:Key="VerticalScrollBar" TargetType="{x:Type ScrollBar}">
        <Grid >
            <Grid.RowDefinitions>
                <RowDefinition Height="18"/>
                <RowDefinition />
                <RowDefinition Height="18"/>
            </Grid.RowDefinitions>
            <!--上按钮-->
            <RepeatButton Grid.Row="0" Style="{StaticResource ScrollBarLineButton}" Height="18" Command="ScrollBar.LineUpCommand" Content="M 0 4 L 4 0 L 8 4 Z"/>
            <Track Name="PART_Track" Grid.Row="1" IsDirectionReversed="true" >
                <Track.DecreaseRepeatButton>
                    <RepeatButton Width="5" Style="{StaticResource ScrollBarPageButton}" Command="ScrollBar.PageUpCommand" />
                </Track.DecreaseRepeatButton>
                <Track.Thumb>
                    <Thumb Style="{StaticResource ScrollBarThumb}"  BorderBrush="{StaticResource HorizontalNormalBorderBrush}">
                    </Thumb>
                </Track.Thumb>
                <Track.IncreaseRepeatButton>
                    <RepeatButton Width="5" Style="{StaticResource ScrollBottomBarPageButton}" Command="ScrollBar.PageDownCommand" />
                </Track.IncreaseRepeatButton>
            </Track>
            <!--下按钮-->
            <RepeatButton Grid.Row="3" Style="{StaticResource ScrollBarLineButton}" Height="18" Command="ScrollBar.LineDownCommand" Content="M 0 0 L 4 4 L 8 0 Z"/>
        </Grid>
    </ControlTemplate>    

Answer 2

<Style TargetType="{x:Type ScrollViewer}">
        <Setter Property="OverridesDefaultStyle" Value="True"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ScrollViewer}">
                    <Grid >
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition/>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition/>
                            <RowDefinition Height="Auto"/>
                        </Grid.RowDefinitions>                        <ScrollContentPresenter/>                        <ScrollBar Name="PART_VerticalScrollBar"
                                       Grid.Column="1"
                                       Value="{TemplateBinding VerticalOffset}"
                                       Maximum="{TemplateBinding ScrollableHeight}"
                                       Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"
                                       Template="{StaticResource VerticalScrollBar}"
                                       ViewportSize="{TemplateBinding ViewportHeight}"
                                    />
                        <!--<ScrollBar Name="PART_HorizontalScrollBar"
                                       Orientation="Horizontal"
                                       Grid.Row="1"
                                       Value="{TemplateBinding HorizontalOffset}"
                                       Maximum="{TemplateBinding ScrollableWidth}"
                                       ViewportSize="{TemplateBinding ViewportWidth}"
                                       Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"
                                       />
                        -->                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>    <Style x:Key="{x:Type ScrollBar}" TargetType="{x:Type ScrollBar}">
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="OverridesDefaultStyle" Value="true"/>
        <Style.Triggers>
            <!--<Trigger Property="Orientation" Value="Vertical">
                <Setter Property="Width" Value="10"/>
                <Setter Property="Height" Value="Auto" />
                <Setter Property="Template"
                        Value="{StaticResource VerticalScrollBar}" />
            </Trigger>-->
        </Style.Triggers>
    </Style></ResourceDictionary>

Answer 3

listbox开启虚拟化 VirtualizingStackPanel.IsVirtualizing="True"
<ListBox VirtualizingStackPanel.IsVirtualizing="True" x:Name="listBox1" Background="Transparent" 
                 ScrollViewer.VerticalScrollBarVisibility="Visible" ScrollViewer.HorizontalScrollBarVisibility="Hidden">
        </ListBox>去掉样式就可以正常虚拟化,我想因该使样式里有什么地方要编辑下,有问遇到这样的问题不?

Answer 4

一段段比较默认的样式,找到了,要改下ScrollViewer...
<ScrollContentPresenter Grid.Column="0" Grid.Row="0" Margin="{TemplateBinding Control.Padding}" Content="{TemplateBinding ContentControl.Content}" ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}" CanContentScroll="{TemplateBinding ScrollViewer.CanContentScroll}" />

Answer 5

wpf 修改了样式 其实不是虚拟化消失的主要原因，问题有点久了，回答下 为后来者 提点思路，第一设置ScrollViewer.CanContentScroll="True"  VirtualizingStackPanel.IsVirtualizing="True" 第二重写虚拟化面板