Telerik控件使用Expression_DarkTheme后引发Combobx下拉问题

之前在Telerik的官方论坛中发现了有人提出该问题，但官方并未给出解决方案。

官方的回应应该是说Telerik版本问题，但实际上应该不是，我也换到了最新的版本依然会有问题。

没有办法，只能另外定一个全局样式临时性解决该问题。解决方案如下：

其实就是按样式重写一下RadComboBoxItem的样式即可，把Resource加入到App.xaml当中去。

 1 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 2                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 3                     xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">
 4     
 5     <!--重写Combobox下拉菜单样式-->
 6     <SolidColorBrush x:Key="ItemBackground_Selected" Color="#FF878787" />
 7     <SolidColorBrush x:Key="ItemForeground_Selected" Color="#FF262626" />
 8     <ControlTemplate x:Key="RadComboBoxItemTemplate" TargetType="telerik:RadComboBoxItem">
 9         <Border x:Name="Background" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}">
10             <VisualStateManager.VisualStateGroups>
11                 <VisualStateGroup x:Name="CommonStates">
12                     <VisualState x:Name="Normal" />
13                     <VisualState x:Name="MouseOver">
14                         <Storyboard>
15                             <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Highlight" Storyboard.TargetProperty="(UIElement.Visibility)">
16                                 <DiscreteObjectKeyFrame KeyTime="0:0:0">
17                                     <DiscreteObjectKeyFrame.Value>
18                                         <Visibility>Visible</Visibility>
19                                     </DiscreteObjectKeyFrame.Value>
20                                 </DiscreteObjectKeyFrame>
21                             </ObjectAnimationUsingKeyFrames>
22                             <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Content" Storyboard.TargetProperty="(ContentControl.Foreground)">
23                                 <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{StaticResource ItemForeground_Selected}" />
24                             </ObjectAnimationUsingKeyFrames>
25                         </Storyboard>
26                     </VisualState>
27                     <VisualState x:Name="Disabled" />
28                 </VisualStateGroup>
29             </VisualStateManager.VisualStateGroups>
30             <Grid>
31                 <Rectangle x:Name="Highlight" Fill="{StaticResource ItemBackground_Selected}" Visibility="Collapsed" />
32                 <ContentPresenter x:Name="Content" Margin="{TemplateBinding Padding}" 
33                             HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
34                             VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
35             </Grid>
36         </Border>
37     </ControlTemplate>
38 
39     <Style x:Key="RadComboBoxItemStyle" TargetType="telerik:RadComboBoxItem">
40         <Setter Property="Background" Value="Transparent" />
41         <Setter Property="Template" Value="{StaticResource RadComboBoxItemTemplate}" />
42         <Setter Property="HorizontalContentAlignment" Value="Stretch" />
43         <Setter Property="VerticalContentAlignment" Value="Stretch" />
44         <Setter Property="Padding" Value="3 6" />
45         <Setter Property="FocusVisualStyle" Value="{x:Null}" />
46     </Style>
47     <Style TargetType="telerik:RadComboBoxItem" BasedOn="{StaticResource RadComboBoxItemStyle}" />
48 </ResourceDictionary>