Combox自定义样式
<Style x:Key="SimpleComboBox" TargetType="{x:Type ComboBox}">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="ItemContainerStyle" Value="{DynamicResource SimpleComboBoxItem}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ComboBox}">
<Border >
<Border.Background>
<ImageBrush ImageSource="Styles/Images/LatestReleases/button_sortby_normalmode_woutfont.png"></ImageBrush>
</Border.Background>
<Grid>
<!-- The ToggleButton is databound to the ComboBox itself to toggle IsDropDownOpen -->
<ToggleButton Width="35" Grid.Column="2" x:Name="ToggleButton" HorizontalAlignment="Right" Background="Transparent"
Focusable="false" IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press">
<ToggleButton.Style>
<Style TargetType="ToggleButton">
<Setter Property="Padding" Value="0"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Grid Background="Transparent"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ToggleButton.Style>
</ToggleButton>
<ContentPresenter HorizontalAlignment="Left" Margin="10,3,23,3" x:Name="ContentSite" VerticalAlignment="Center" Content="{TemplateBinding SelectionBoxItem}" ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}" IsHitTestVisible="False"/>
<!-- The TextBox must be named PART_EditableTextBox or ComboBox will not recognize it -->
<TextBox Visibility="Hidden" Template="{DynamicResource ComboBoxTextBox}" HorizontalAlignment="Left" Margin="3,3,23,3"
x:Name="PART_EditableTextBox" Style="{x:Null}" VerticalAlignment="Center" Focusable="True"
Background="Transparent" IsReadOnly="{TemplateBinding IsReadOnly}" FontFamily="Segoe WP"/>
<!-- The Popup shows the list of items in the ComboBox. IsOpen is databound to IsDropDownOpen which is toggled via the ComboBoxToggleButton -->
<Popup IsOpen="{TemplateBinding IsDropDownOpen}" Placement="Bottom" x:Name="Popup" Focusable="False" AllowsTransparency="True" PopupAnimation="Slide">
<Grid MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{TemplateBinding ActualWidth}" x:Name="DropDown" SnapsToDevicePixels="True">
<Border x:Name="DropDownBorder" Background="{DynamicResource WindowBackgroundBrush}" BorderBrush="{DynamicResource SolidBorderBrush}" BorderThickness="1"/>
<ScrollViewer Margin="0,3,2,2" Style="{DynamicResource SimpleScrollViewer}" SnapsToDevicePixels="True" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" CanContentScroll="True">
<!-- The StackPanel is used to display the children by setting IsItemsHost to be True -->
<StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained"/>
</ScrollViewer>
</Grid>
</Popup>
</Grid>
</Border>
<ControlTemplate.Triggers>
<!-- This forces the DropDown to have a minimum size if it is empty -->
<Trigger Property="HasItems" Value="false">
<Setter Property="MinHeight" Value="95" TargetName="DropDownBorder"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource DisabledForegroundBrush}"/>
</Trigger>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
<Trigger Property="AllowsTransparency" SourceName="Popup" Value="true">
<Setter Property="CornerRadius" Value="4" TargetName="DropDownBorder"/>
<Setter Property="Margin" Value="0,2,0,0" TargetName="DropDownBorder"/>
</Trigger>
<Trigger Property="IsEditable" Value="true">
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Visibility" Value="Visible" TargetName="PART_EditableTextBox"/>
<Setter Property="Visibility" Value="Hidden" TargetName="ContentSite"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- Simple ComboBoxItem - This is used for each item inside of the ComboBox. You can change the selected color of each item below-->
<Style x:Key="SimpleComboBoxItem" TargetType="{x:Type ComboBoxItem}">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Height" Value="35"/>
<Setter Property="Padding" Value="10,2,2,2"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ComboBoxItem}">
<Grid SnapsToDevicePixels="true" Name="Grid" Height="{TemplateBinding Height}">
<Grid.Background>
<ImageBrush ImageSource="Styles/Images/LatestReleases/button_sortby_menu_normalmode_woutfont.png" />
</Grid.Background>
<ContentPresenter Margin="{TemplateBinding Padding}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Grid>
<ControlTemplate.Triggers>
<!-- Change IsHighlighted SelectedBackgroundBrush to set the selection color for the items -->
<Trigger Property="IsHighlighted" Value="true">
<Setter Property="Background" TargetName="Grid">
<Setter.Value>
<ImageBrush ImageSource="Styles/Images/LatestReleases/button_sortby_menu_clickmode_woutfont.png" />
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter Property="Background" TargetName="Grid">
<Setter.Value>
<ImageBrush ImageSource="Styles/Images/LatestReleases/button_sortby_menu_clickmode_woutfont.png" />
</Setter.Value>
</Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>