我正在尝试为WPF ComboBox创建自定义样式但是每当我这样做时，下拉列表都没有打开，我想使用从我的按钮样式创建的以下XAML代码，但是将它移植到使用ComboBox控件，我将如何做到这一点，以便下拉菜单显示，并让我能够更改鼠标悬停颜色。
<ControlTemplate TargetType="Button">
<Border Name="border"
BorderThickness="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}"
BorderBrush="{TemplateBinding BorderBrush}"
CornerRadius="1"
Background="{TemplateBinding Background}">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<!--TODO: Set the right colors-->
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="border" Property="BorderBrush" Value="#FFC6C6C6" />
<Setter Property="Foreground" Value="#FF333333" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Foreground" Value="#FF666666" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="#FFCCCCCC"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
答案 0 :(得分：6)
ComboBoxes相当复杂，如果你改变ControlTemplate的一个方面，就像你需要提供所有其他功能的那些触发器一样，你最好的选择可能是复制默认模板并进行调整。可以找到默认模板on MSDN（请参阅Default WPF Themes链接）。
答案 1 :(得分：1)
如果要更改整个ComboBox控件的外观，最简单的方法是从original template开始并修改它以满足您的需要。要更改项目突出显示的方式，您需要重置HighlightBrushKey值。希望此资源有用：http://bea.stollnitz.com/blog/?p=26
答案 2 :(得分：0)
您必须覆盖默认的ComboBox模板才能使其正常工作（请参阅此SO帖子）。
您是否可以访问Expression Blend？您可以使用它来提取和编辑控件模板。我觉得它对edit / create模板非常有用。
Show Me the Templates是另一种查看控件模板的工具。
答案 3 :(得分：0)
您可以尝试使用此模板并按照自己的方式进行编辑。
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d">
<ControlTemplate x:Key="ComboBoxToggleButton" TargetType="ToggleButton">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="20" />
</Grid.ColumnDefinitions>
<Border
x:Name="Border"
Grid.ColumnSpan="2"
CornerRadius="0"
Background="#FF535353"
BorderBrush="#FF535353"
BorderThickness="0" />
<Border
Grid.Column="0"
CornerRadius="0,0,0,0"
Margin="1"
Background="#FF323232"
BorderBrush="#FF535353"
BorderThickness="3,0,0,0" />
<Path
x:Name="Arrow"
Grid.Column="1"
Fill="#3a3a3a"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="M 0 0 L 4 4 L 8 0 Z"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter TargetName="Border" Property="Background" Value="LightGray" />
<Setter TargetName="Border" Property="BorderBrush" Value="Gray" />
<Setter Property="Foreground" Value="DarkGray"/>
<Setter TargetName="Arrow" Property="Fill" Value="DarkGray" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<ControlTemplate x:Key="ComboBoxTextBox" TargetType="TextBox">
<Border x:Name="PART_ContentHost" Focusable="False" Height="30" BorderThickness="0" Background="Transparent" />
</ControlTemplate>
<Style x:Key="CmoboboxStyle" TargetType="ComboBox">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
<Setter Property="MinWidth" Value="120"/>
<Setter Property="MinHeight" Value="20"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<Grid>
<ToggleButton
Name="ToggleButton"
Template="{StaticResource ComboBoxToggleButton}"
Grid.Column="2"
Focusable="false"
IsChecked="{Binding Path=IsDropDownOpen,Mode=TwoWay,RelativeSource={RelativeSource TemplatedParent}}"
ClickMode="Press">
</ToggleButton>
<ContentPresenter
Name="ContentSite"
IsHitTestVisible="False"
Content="{TemplateBinding SelectionBoxItem}"
ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}"
Margin="8,0,0,0"
VerticalAlignment="Center"
HorizontalAlignment="Left" />
<TextBox x:Name="PART_EditableTextBox"
Style="{x:Null}"
Template="{StaticResource ComboBoxTextBox}"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Text="{TemplateBinding Text}"
Focusable="True"
Background="Transparent"
Visibility="Hidden"
Foreground="DarkBlue"
IsReadOnly="{TemplateBinding IsReadOnly}"/>
<Popup
Name="Popup"
Placement="Bottom"
IsOpen="{TemplateBinding IsDropDownOpen}"
AllowsTransparency="True"
Focusable="False"
PopupAnimation="Slide">
<Grid
Name="DropDown"
SnapsToDevicePixels="True"
MinWidth="{TemplateBinding ActualWidth}"
MaxHeight="{TemplateBinding MaxDropDownHeight}">
<Border
x:Name="DropDownBorder"
Background="#FF323232"
BorderThickness="4,0,0,0"
BorderBrush="#FF535353"/>
<ScrollViewer Margin="4,0,0,0" SnapsToDevicePixels="True">
<StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained" />
</ScrollViewer>
</Grid>
</Popup>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="HasItems" Value="false">
<Setter TargetName="DropDownBorder" Property="MinHeight" Value="95"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="LightGray"/>
</Trigger>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
<Trigger SourceName="Popup" Property="Popup.AllowsTransparency" Value="true">
<Setter TargetName="DropDownBorder" Property="CornerRadius" Value="0,0,0,0"/>
<Setter TargetName="DropDownBorder" Property="Margin" Value="0"/>
</Trigger>
<Trigger Property="IsEditable"
Value="true">
<Setter Property="IsTabStop" Value="false"/>
<Setter TargetName="PART_EditableTextBox" Property="Visibility" Value="Visible"/>
<Setter TargetName="ContentSite" Property="Visibility" Value="Hidden"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
</Style.Triggers>
</Style>
</ResourceDictionary>