WPF中自义定漂亮的滚动条

最终效果如下图：

下面这张图会让您对样式文件中的属性设置有些绑助。

样式文件xaml如下：

<Window.Resources>
        <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" />
        <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="Transparent" />
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="ScrollBarThumb" TargetType="{x:Type Thumb}">
            <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 Thumb}">
                        <Border
          CornerRadius="2"
          Background="{TemplateBinding Background}"
          BorderBrush="{TemplateBinding BorderBrush}"
          BorderThickness="1" />
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <ControlTemplate x:Key="VerticalScrollBar"
            TargetType="{x:Type ScrollBar}">
            <Grid >
                <Grid.RowDefinitions>
                    <RowDefinition MaxHeight="18"/>
                    <RowDefinition Height="0.00001*"/>
                    <RowDefinition MaxHeight="18"/>
                </Grid.RowDefinitions>
                <Border
      Grid.RowSpan="3"
      CornerRadius="2"
      Background="#F0F0F0" />
                <RepeatButton
      Grid.Row="0"
      Style="{StaticResource ScrollBarLineButton}"
      Height="18"
      Command="ScrollBar.LineUpCommand"
      Content="M 0 4 L 8 4 L 4 0 Z" />
                <Track
      Name="PART_Track"
      Grid.Row="1"
      IsDirectionReversed="true">
                    <Track.DecreaseRepeatButton>
                        <RepeatButton
          Style="{StaticResource ScrollBarPageButton}"
          Command="ScrollBar.PageUpCommand" />
                    </Track.DecreaseRepeatButton>
                    <Track.Thumb>
                        <Thumb
          Style="{StaticResource ScrollBarThumb}"
          Margin="1,0,1,0"
          Background="{StaticResource HorizontalNormalBrush}"
          BorderBrush="{StaticResource HorizontalNormalBorderBrush}" />
                    </Track.Thumb>
                    <Track.IncreaseRepeatButton>
                        <RepeatButton
          Style="{StaticResource ScrollBarPageButton}"
          Command="ScrollBar.PageDownCommand" />
                    </Track.IncreaseRepeatButton>
                </Track>
                <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>

        <ControlTemplate x:Key="HorizontalScrollBar"
            TargetType="{x:Type ScrollBar}">
            <Grid >
                <Grid.ColumnDefinitions>
                    <ColumnDefinition MaxWidth="18"/>
                    <ColumnDefinition Width="0.00001*"/>
                    <ColumnDefinition MaxWidth="18"/>
                </Grid.ColumnDefinitions>
                <Border
      Grid.ColumnSpan="3"
      CornerRadius="2"
      Background="#F0F0F0" />
                <RepeatButton
      Grid.Column="0"
      Style="{StaticResource ScrollBarLineButton}"
      Width="18"
      Command="ScrollBar.LineLeftCommand"
      Content="M 4 0 L 4 8 L 0 4 Z" />
                <Track
      Name="PART_Track"
      Grid.Column="1"
      IsDirectionReversed="False">
                    <Track.DecreaseRepeatButton>
                        <RepeatButton
          Style="{StaticResource ScrollBarPageButton}"
          Command="ScrollBar.PageLeftCommand" />
                    </Track.DecreaseRepeatButton>
                    <Track.Thumb>
                        <Thumb
          Style="{StaticResource ScrollBarThumb}"
          Margin="0,1,0,1"
          Background="{StaticResource NormalBrush}"
          BorderBrush="{StaticResource NormalBorderBrush}" />
                    </Track.Thumb>
                    <Track.IncreaseRepeatButton>
                        <RepeatButton
          Style="{StaticResource ScrollBarPageButton}"
          Command="ScrollBar.PageRightCommand" />
                    </Track.IncreaseRepeatButton>
                </Track>
                <RepeatButton
      Grid.Column="3"
      Style="{StaticResource ScrollBarLineButton}"
      Width="18"
      Command="ScrollBar.LineRightCommand"
      Content="M 0 0 L 4 4 L 0 8 Z"/>
            </Grid>
        </ControlTemplate>
        <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="Horizontal">
                    <Setter Property="Width" Value="Auto"/>
                    <Setter Property="Height" Value="18" />
                    <Setter Property="Template"
                        Value="{StaticResource HorizontalScrollBar}" />
                </Trigger>
                <Trigger Property="Orientation" Value="Vertical">
                    <Setter Property="Width" Value="18"/>
                    <Setter Property="Height" Value="Auto" />
                    <Setter Property="Template"
                        Value="{StaticResource VerticalScrollBar}" />
                </Trigger>
            </Style.Triggers>
        </Style>

        <Style x:Key="FavsScrollViewer" TargetType="{x:Type ScrollViewer}">
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ScrollViewer}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>

                            <ScrollContentPresenter Grid.Column="1"/>

                            <ScrollBar Name="PART_VerticalScrollBar"
            Value="{TemplateBinding VerticalOffset}"
            Maximum="{TemplateBinding ScrollableHeight}"
            ViewportSize="{TemplateBinding ViewportHeight}"
            Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"/>
                            <ScrollBar Name="PART_HorizontalScrollBar"
            Orientation="Horizontal"
            Grid.Row="1"
            Grid.Column="1"
            Value="{TemplateBinding HorizontalOffset}"
            Maximum="{TemplateBinding ScrollableWidth}"
            ViewportSize="{TemplateBinding ViewportWidth}"
            Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"/>

                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>


    </Window.Resources>

主程序：

<Grid>
        <ScrollViewer  RenderTransformOrigin="0.5,0.5" HorizontalAlignment="Stretch"
                        Margin="0"
                        Width="Auto" HorizontalScrollBarVisibility="Visible"
                        Style="{StaticResource FavsScrollViewer}">
            <local:UserControl1 Width="500" Height="500"></local:UserControl1>
        </ScrollViewer>
    </Grid>