WPF⾃定义滚动条（ScrollView、ScrollBar）样式⼀、滚动条基本样式
本次修改Scrollview及ScrollBar滚动条样式是通过纯样式实现的。修改的内容包含滚动条的颜⾊，上下按钮的隐藏。另外添加了⿏标经过滚动条动画。style样式如下：
<!-- ScrollViewer 滚动条 -->
<Style x:Key="ScrollBarThumb" TargetType="{x:Type Thumb}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Grid>
<!--滚动条颜⾊-->
<Border Background="#646465" CornerRadius="3"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="HorizontalScrollBarPageButton" TargetType="{x:Type RepeatButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Opacity" Value="0.2"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Rectangle Fill="{TemplateBinding Background}" Width="{TemplateBinding Width}" Height="{TemplateBinding Height}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="VerticalScrollBarPageButton" TargetType="{x:Type RepeatButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Opacity" Value="0.2"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Rectangle Fill="{TemplateBinding Background}" Width="{TemplateBinding Width}" Height="{TemplateBinding Height}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!--滚动条上下按钮-->
<Style x:Key="VerticalScrollBarPageButton2" TargetType="{x:Type RepeatButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Opacity" Value="0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Rectangle Fill="#90000000" Width="0" Height="0"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="for_scrollbar" TargetType="{x:Type ScrollBar}">
<Setter Property="Stylus.IsPressAndHoldEnabled" Value="false"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="false"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Margin" Value="0,1,1,6"/>
<Setter Property="Width" Value="10"/>
<Setter Property="MinWidth" Value="5"/>
<Setter Property="Opacity" Value="0.2"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" SnapsToDevicePixels="true">
<Grid.RowDefinitions>
<RowDefinition Height="auto"></RowDefinition>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="auto"></RowDefinition>
</Grid.RowDefinitions>
<RepeatButton Grid.Row="0" Style="{StaticResource VerticalScrollBarPageButton2}" Command="{x:Static ScrollBar.PageUpCommand}"/>
<Track x:Name="PART_Track" Grid.Row="1" IsEnabled="{TemplateBinding IsMouseOver}" IsDirectionReversed="true">
<Track.DecreaseRepeatButton>
<RepeatButton Style="{StaticResource VerticalScrollBarPageButton}" Command="{x:Static ScrollBar.PageUpCommand}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Style="{StaticResource VerticalScrollBarPageButton}" Command="{x:Static ScrollBar.PageDownCommand}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumb}"/>
</Track.Thumb>
</Track>
<RepeatButton Grid.Row="2" Style="{StaticResource VerticalScrollBarPageButton2}" Command="{x:Static ScrollBar.PageDownCommand}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Orientation" Value="Horizontal">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Margin" Value="1,0,6,1"/>
<Setter Property="Height" Value="5"/>
<Setter Property="MinHeight" Value="5"/>
<Setter Property="Width" Value="Auto"/>
<Setter Property="Opacity" Value="0.2"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" SnapsToDevicePixels="true">
<Track x:Name="PART_Track" IsEnabled="{TemplateBinding IsMouseOver}">
<Track.DecreaseRepeatButton>
<RepeatButton Style="{StaticResource HorizontalScrollBarPageButton}" Command="{x:Static ScrollBar.PageLeftCommand}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Style="{StaticResource HorizontalScrollBarPageButton}" Command="{x:Static ScrollBar.PageRightCommand}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumb}"/>
</Track.Thumb>
</Track>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="for_scrollviewer"
TargetType="{x:Type ScrollViewer}">
<Setter Property="BorderBrush" Value="LightGray"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollViewer}">
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="True">
<Grid Background="{TemplateBinding Background}">
<ScrollContentPresenter Cursor="{TemplateBinding Cursor}" Margin="{TemplateBinding Padding}" ContentTemplate="{TemplateBinding ContentTemplate}"/> <ScrollBar x:Name="PART_VerticalScrollBar"
HorizontalAlignment="Right"
Maximum="{TemplateBinding ScrollableHeight}"
Orientation="Vertical"
Style="{StaticResource for_scrollbar}"
ViewportSize="{TemplateBinding ViewportHeight}"
Value="{TemplateBinding VerticalOffset}"
Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"/>
<ScrollBar x:Name="PART_HorizontalScrollBar"
Orientation="Horizontal"
Style="{StaticResource for_scrollbar}"
VerticalAlignment="Bottom"
html横向滚动条样式Value="{TemplateBinding HorizontalOffset}"
ViewportSize="{TemplateBinding ViewportWidth}"
Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"/> </Grid>
</Border>
<ControlTemplate.Triggers>
<EventTrigger RoutedEvent="ScrollChanged">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="PART_VerticalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.8"
Duration="0:0:1"/>
<DoubleAnimation
Storyboard.TargetName="PART_VerticalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.2"
Duration="0:0:1"
BeginTime="0:0:1"/>
<DoubleAnimation
Storyboard.TargetName="PART_HorizontalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.8"
Duration="0:0:1"/>
<DoubleAnimation
Storyboard.TargetName="PART_HorizontalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.2"
Duration="0:0:1"
BeginTime="0:0:1"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="MouseEnter"
SourceName="PART_VerticalScrollBar">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="PART_VerticalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.8"
Duration="0:0:0.7"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="MouseLeave"
SourceName="PART_VerticalScrollBar">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="PART_VerticalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.2"
Duration="0:0:0.7"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="MouseEnter"
SourceName="PART_HorizontalScrollBar">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="PART_HorizontalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.8"
Duration="0:0:0.7"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="MouseLeave"
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="PART_HorizontalScrollBar"
Storyboard.TargetProperty="Opacity"
To="0.2"
Duration="0:0:0.7"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!--默认ScrollBar-->
<Style TargetType="ScrollBar" BasedOn="{StaticResource for_scrollbar}"/>
<!--默认ScrollView-->
<Style TargetType="ScrollViewer" BasedOn="{StaticResource for_scrollviewer}"/>
修改之后的滚动条是影响全局的。
样式应⽤之后的效果如下：
引⽤⽰例：
<ScrollViewer Margin="10" Height="200" Width="100" BorderBrush="Gray" BorderThickness="1"> <StackPanel Orientation="Vertical">
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
<TextBlock Text="测试⼀"/>
</StackPanel>
</ScrollViewer>
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