接续上次的程序，稍微改动一下原有样式，并添加一个数据模板，我们就可以达成下面这样的显示功能：
鼠标悬停于文件列表项上，会在工具提示中显示图像缩略图及文件名、文件大小信息。
选中一个列表项，该列表项会扩大，并动态显示出一个小缩略图及文件的所在路径。
代码如下：
Code
<Application x:Class="自定义列表项.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:c="clr-namespace:System.IO;assembly=mscorlib"
StartupUri="Window1.xaml">
<Application.Resources>
<!--FileInfo数据模板-->
<DataTemplate DataType="{x:Type c:FileInfo}">
<WrapPanel VerticalAlignment="Center">
<WrapPanel.ToolTip>
<WrapPanel Width="164">
<Image Margin="2,4" MaxHeight="160" MaxWidth="160" Source="{Binding FullName}"/>
<TextBlock Text="{Binding Name}" Width="160" Margin="2"/>
<TextBlock Margin="2" Text="{Binding Length}"/><TextBlock Margin="2">字节</TextBlock>
</WrapPanel>
</WrapPanel.ToolTip>
<Image x:Name="pic" Margin="2" Opacity="0" MaxHeight="0" MaxWidth="0" Source="{Binding FullName}" />
<StackPanel VerticalAlignment="Center">
<TextBlock x:Name="title" Height="24" Margin="2,0" Text="{Binding Name}"/>
<TextBlock x:Name="path" Opacity="0" Height="0" Margin="2,0" Text="{Binding FullName}"/>
</StackPanel>
</WrapPanel>
<DataTemplate.Triggers>
<Trigger Property="Height" Value="68">
<Setter TargetName="path" Property="Height" Value="24"/>
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation To="1" BeginTime="0:0:0.1" Duration="0:0:0.1" Storyboard.TargetName="pic" Storyboard.TargetProperty="Opacity" />
<DoubleAnimation To="64" BeginTime="0:0:0.1" Duration="0:0:0.1" Storyboard.TargetName="pic" Storyboard.TargetProperty="MaxHeight" />
<DoubleAnimation To="64" BeginTime="0:0:0.1" Duration="0:0:0.1" Storyboard.TargetName="pic" Storyboard.TargetProperty="MaxWidth" />
<DoubleAnimation To="0.4" BeginTime="0:0:0.1" Duration="0:0:0.1" Storyboard.TargetName="path" Storyboard.TargetProperty="Opacity" />
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation BeginTime="0:0:0.4" Duration="0:0:0.1" Storyboard.TargetName="pic" Storyboard.TargetProperty="Opacity" />
<DoubleAnimation BeginTime="0:0:0.3" Duration="0:0:0.1" Storyboard.TargetName="pic" Storyboard.TargetProperty="MaxHeight" />
<DoubleAnimation BeginTime="0:0:0.3" Duration="0:0:0.1" Storyboard.TargetName="pic" Storyboard.TargetProperty="MaxWidth" />
<DoubleAnimation BeginTime="0:0:0.4" Duration="0:0:0.1" Storyboard.TargetName="path" Storyboard.TargetProperty="Opacity" />
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
</DataTemplate.Triggers>
</DataTemplate>
<!--ListBox样式-->
<Style TargetType="ListBox">
<Setter Property="BorderBrush" Value="#BDD4F1"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Background" Value="#F8F7F5"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
</Style>
<!--ListBoxItem样式-->
<Style TargetType="ListBoxItem">
<Setter Property="Foreground" Value="#B5BABF"/>
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="Height" Value="28"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Border Name="back" BorderBrush="#F8F7F5" BorderThickness="0,1,0,1">
<Border.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
<GradientBrush.GradientStops>
<GradientStopCollection>
<GradientStop Color="#F8F7F5" Offset="0.0"/>
<GradientStop Color="#F8F7F5" Offset="0.5"/>
<GradientStop Color="#F8F7F5" Offset="0.51"/>
<GradientStop Color="#F8F7F5" Offset="1"/>
</GradientStopCollection>
</GradientBrush.GradientStops>
</LinearGradientBrush>
</Border.Background>
<ContentPresenter x:Name="content" Height="28" Margin="2" VerticalAlignment="Center"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation To="68" Duration="0:0:0.3" Storyboard.TargetName="content" Storyboard.TargetProperty="Height"/>
<DoubleAnimation To="68" Duration="0:0:0.3" Storyboard.TargetProperty="Height"/>
<ColorAnimation To="#F3C37C" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" />
<ColorAnimation To="#952B00" Duration="0:0:0.2" Storyboard.TargetProperty="(ListBoxItem.Foreground).(SolidColorBrush.Color)" />
<ColorAnimation To="#FFF" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" />
<ColorAnimation To="#FFEF99" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" />
<ColorAnimation To="#FFE13F" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[2].(GradientStop.Color)" />
<ColorAnimation To="#FFF3B0" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[3].(GradientStop.Color)" />
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation BeginTime="0:0:0.4" Duration="0:0:0.2" Storyboard.TargetName="content" Storyboard.TargetProperty="Height"/>
<DoubleAnimation BeginTime="0:0:0.4" Duration="0:0:0.2" Storyboard.TargetProperty="Height"/>
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetProperty="(ListBoxItem.Foreground).(SolidColorBrush.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[2].(GradientStop.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[3].(GradientStop.Color)" />
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
<Trigger Property="IsMouseOver" Value="True">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<ColorAnimation To="#D8E6F5" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" />
<ColorAnimation To="#617A98" Duration="0:0:0.2" Storyboard.TargetProperty="(ListBoxItem.Foreground).(SolidColorBrush.Color)" />
<ColorAnimation To="#F6F9FD" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" />
<ColorAnimation To="#E0EBF7" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" />
<ColorAnimation To="#D7E5F6" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[2].(GradientStop.Color)" />
<ColorAnimation To="#F6F9FD" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[3].(GradientStop.Color)" />
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetProperty="(ListBoxItem.Foreground).(SolidColorBrush.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[2].(GradientStop.Color)" />
<ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[3].(GradientStop.Color)" />
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!--以前教程中使用的按钮样式-->
<Style TargetType="Button">
<Setter Property="Foreground" Value="Black"/>
<!--修改模板属性-->
<Setter Property="Template">
<Setter.Value>
<!--控件模板-->
<ControlTemplate TargetType="Button">
<!--背景色-->
<Border x:Name="back" Opacity="0.8" CornerRadius="3">
<Border.BitmapEffect>
<OuterGlowBitmapEffect Opacity="0.7" GlowSize="0" GlowColor="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(Button.Background).(SolidColorBrush.Color)}" />
</Border.BitmapEffect>
<Border.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1.5">
<GradientBrush.GradientStops>
<GradientStopCollection>
<GradientStop Color="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(Button.Background).(SolidColorBrush.Color)}" Offset="0"/>
<GradientStop Color="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(Button.Background).(SolidColorBrush.Color)}" Offset="0.4"/