解决方法
您可以通过自定义ListBox项目的现有控制模板来执行此操作.简单的方法是启动Expression Blend,右键单击ListBoxItem,转到Edit Control Parts(模板),然后选择Edit a copy …然后根据需要自定义fillColor和fillColor2矩形的填充颜色.
下面的Xaml将ListBoxItem鼠标悬停颜色设置为透明,所选颜色为绿色,但您可以根据需要自定义此颜色：
<UserControl x:Class="SilverlightApplication2.Page"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows"
Width="400" Height="300" Background="#FF000000">
<UserControl.Resources>
<Style x:Key="ListBoxItemStyleTransparent" targettype="ListBoxItem">
<Setter Property="Padding" Value="3"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Top"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="TabNavigation" Value="Local"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate targettype="ListBoxItem">
<Grid Background="{TemplateBinding Background}">
<vsm:visualstatemanager.VisualStateGroups>
<vsm:VisualStateGroup x:Name="CommonStates">
<vsm:VisualState x:Name="normal"/>
<vsm:VisualState x:Name="MouSEOver">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="fillColor" Storyboard.TargetProperty="Opacity">
<SplineDoubleKeyFrame KeyTime="0" Value=".35"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
<vsm:VisualState x:Name="disabled">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="Opacity">
<SplineDoubleKeyFrame KeyTime="0" Value=".55"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
</vsm:VisualStateGroup>
<vsm:VisualStateGroup x:Name="SelectionStates">
<vsm:VisualState x:Name="Unselected"/>
<vsm:VisualState x:Name="Selected">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="fillColor2" Storyboard.TargetProperty="Opacity">
<SplineDoubleKeyFrame KeyTime="0" Value=".75"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
</vsm:VisualStateGroup>
<vsm:VisualStateGroup x:Name="Focusstates">
<vsm:VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Visibility">
<discreteObjectKeyFrame KeyTime="0">
<discreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</discreteObjectKeyFrame.Value>
</discreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
<vsm:VisualState x:Name="Unfocused"/>
</vsm:VisualStateGroup>
</vsm:visualstatemanager.VisualStateGroups>
<Rectangle x:Name="fillColor" IsHitTestVisible="False" Opacity="0" RadiusX="1" RadiusY="1" Fill="Transparent"/>
<Rectangle x:Name="fillColor2" IsHitTestVisible="False" Opacity="0" Fill="#FF00FF00" RadiusX="1" RadiusY="1"/>
<ContentPresenter HorizontalAlignment="Left" Margin="{TemplateBinding Padding}" x:Name="contentPresenter" Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}"/>
<Rectangle x:Name="FocusVisualElement" Visibility="Collapsed" stroke="#FF6DBDD1" strokeThickness="1" RadiusX="1" RadiusY="1"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<ListBox x:Name="ListBoxTest">
<ListBoxItem Content="Some String" Style="{StaticResource ListBoxItemStyleTransparent}" />
</ListBox>
</Grid>
</UserControl>
fillColor Rectangle指定当用户鼠标悬停在ListBoxItem上时使用的颜色.在上面的代码中,我将其设置为Transparent,当您将鼠标悬停在ListBoxItem上时,不会出现任何颜色.
fillColor2指定当选择ListBoxItem时要使用的颜色.在上面的代码中,我指定了#FF00FF00,所以当ListBoxItem被选中时,颜色将变绿.
在您的情况下,您可以将fillColor2 Rectangle的“填充”属性设置为“透明”,以便在用户选择项目时模拟没有颜色.
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