好吧,經過大約一天的擺弄,我有一個解決方案。我恨它,但它工作。基本上,我反映到Silverlight的System.Windows.dll中,並且爲ListBoxItem(ComboBoxItem使用)剔除了默認模板。
事實證明,在該模板中,有一個ContentPresenter,其中HorizontalAlignment硬編碼爲Left。所以,我撕掉了模板,併爲HorizontalAlignment添加了一個TemplateBinding,因此它可以使用ComboBoxItem的HorizontalAlignment。
這就是說,接下來是工作代碼。如果有人有更好的方式來做到這一點,請告訴我。我還沒有檢查,如果這是固定在3.0。我希望是。它應該從ComboBox.HorizontalContentAlignment一路綁定。
<UserControl.Resources>
<Style x:Key="FixedComboBoxItem" TargetType="ComboBoxItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBoxItem">
<Grid Background="{TemplateBinding Background}">
<vsm:VisualStateManager.VisualStateGroups>
<vsm:VisualStateGroup x:Name="CommonStates">
<vsm:VisualState x:Name="Normal" />
<vsm:VisualState x:Name="MouseOver">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="fillColor" Storyboard.TargetProperty="Opacity" Duration="0" To=".35"/>
</Storyboard>
</vsm:VisualState>
<vsm:VisualState x:Name="Disabled">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="Opacity" Duration="0" To=".55" />
</Storyboard>
</vsm:VisualState>
</vsm:VisualStateGroup>
<vsm:VisualStateGroup x:Name="SelectionStates">
<vsm:VisualState x:Name="Unselected" />
<vsm:VisualState x:Name="Selected">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="fillColor2" Storyboard.TargetProperty="Opacity" Duration="0" To=".75"/>
</Storyboard>
</vsm:VisualState>
</vsm:VisualStateGroup>
<vsm:VisualStateGroup x:Name="FocusStates">
<vsm:VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Visibility" Duration="0">
<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" Opacity="0" Fill="#FFBADDE9" IsHitTestVisible="False" RadiusX="1" RadiusY="1"/>
<Rectangle x:Name="fillColor2" Opacity="0" Fill="#FFBADDE9" IsHitTestVisible="False" RadiusX="1" RadiusY="1"/>
<ContentPresenter
x:Name="contentPresenter"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
Margin="{TemplateBinding Padding}"/>
<Rectangle x:Name="FocusVisualElement" Stroke="#FF6DBDD1" StrokeThickness="1" Visibility="Collapsed" RadiusX="1" RadiusY="1" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="30" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<ComboBox x:Name="SearchesComboBox" Width="150" ItemContainerStyle="{StaticResource FixedComboBoxItem}" HorizontalContentAlignment="Stretch">
<ComboBox.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Black" BorderThickness="1" >
<TextBlock Text="{Binding}" Margin="2" />
</Border>
</DataTemplate>
</ComboBox.ItemTemplate>
<sys:String>Two</sys:String>
<sys:String>Four</sys:String>
<sys:String>Six</sys:String>
</ComboBox>
</Grid>
不,不幸的是,這並沒有在Silverlight中工作。下拉菜單中的項目大小不正確,但標題中的內容大小正確。驅使我瘋了:) – 2009-07-02 14:21:44
剛做了Silverlight 5的測試,這種方法爲我解決了這個問題。 – Rus 2012-06-20 10:37:32