只是想知道是否有人知道如何改变wpf组合框上按钮的外观？ 万一你想知道我只是想改变它的形状和背景。
感谢。
答案 0 :(得分：3)
您可以使用Expression Blend轻松修改ControlTemplate或控件样式。
下面是一个使用ComboBox的简单样式的例子，我已将Toggle按钮颜色修改为红色。
<LinearGradientBrush x:Key="NormalBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#EEE" Offset="0.0"/>
<GradientStop Color="#CCC" Offset="1.0"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="NormalBorderBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#CCC" Offset="0.0"/>
<GradientStop Color="#444" Offset="1.0"/>
</LinearGradientBrush>
<!-- LightBrush is used for content areas such as Menu, Tab Control background -->
<LinearGradientBrush x:Key="LightBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF" Offset="0.0"/>
<GradientStop Color="#EEE" Offset="1.0"/>
</LinearGradientBrush>
<!-- MouseOverBrush is used for MouseOver in Button, Radio Button, CheckBox -->
<LinearGradientBrush x:Key="MouseOverBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF" Offset="0.0"/>
<GradientStop Color="#AAA" Offset="1.0"/>
</LinearGradientBrush>
<!-- PressedBrush is used for Pressed in Button, Radio Button, CheckBox -->
<LinearGradientBrush x:Key="PressedBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#BBB" Offset="0.0"/>
<GradientStop Color="#EEE" Offset="0.1"/>
<GradientStop Color="#EEE" Offset="0.9"/>
<GradientStop Color="#FFF" Offset="1.0"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="PressedBorderBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#444" Offset="0.0"/>
<GradientStop Color="#888" Offset="1.0"/>
</LinearGradientBrush>
<!-- SelectedBackgroundBrush is used for the Selected item in ListBoxItem, ComboBoxItem-->
<SolidColorBrush x:Key="SelectedBackgroundBrush" Color="#DDD"/>
<!-- Disabled Brushes are used for the Disabled look of each control -->
<SolidColorBrush x:Key="DisabledForegroundBrush" Color="#888"/>
<SolidColorBrush x:Key="DisabledBackgroundBrush" Color="#EEE"/>
<SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAA"/>
<!-- Used for background of ScrollViewer, TreeView, ListBox, Expander, TextBox, Tab Control -->
<SolidColorBrush x:Key="WindowBackgroundBrush" Color="#FFF"/>
<!-- DefaultedBorderBrush is used to show KeyBoardFocus -->
<LinearGradientBrush x:Key="DefaultedBorderBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#777" Offset="0.0"/>
<GradientStop Color="#000" Offset="1.0"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="SolidBorderBrush" Color="#888"/>
<SolidColorBrush x:Key="LightBorderBrush" Color="#AAA"/>
<SolidColorBrush x:Key="LightColorBrush" Color="#DDD"/>
<!-- Used for Checkmark, Radio button, TreeViewItem, Expander ToggleButton glyphs -->
<SolidColorBrush x:Key="GlyphBrush" Color="#444"/>
<Style x:Key="test" TargetType="{x:Type ComboBox}">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ComboBox}">
<Grid>
<!-- The ToggleButton is databound to the ComboBox itself to toggle IsDropDownOpen -->
<ToggleButton Grid.Column="2" Template="{DynamicResource ToggleButtonControlTemplate1}" x:Name="ToggleButton" Focusable="false" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press"/>
<ContentPresenter HorizontalAlignment="Left" Margin="3,3,23,3" 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}"/>
<!-- 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="4,6,4,6" 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>
<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>
<ControlTemplate x:Key="ToggleButtonControlTemplate1" TargetType="{x:Type ToggleButton}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="20"/>
</Grid.ColumnDefinitions>
<Rectangle Grid.ColumnSpan="2" HorizontalAlignment="Stretch" x:Name="Rectangle" VerticalAlignment="Stretch" Width="Auto" Height="Auto" RadiusX="5" RadiusY="5" Fill="{DynamicResource NormalBrush}" Stroke="{DynamicResource NormalBorderBrush}"/>
<Rectangle Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="Auto" Height="Auto" RadiusX="5" RadiusY="5" Fill="{DynamicResource WindowBackgroundBrush}" Stroke="{DynamicResource NormalBorderBrush}"/>
<Path Grid.Column="1" HorizontalAlignment="Center" x:Name="Arrow" VerticalAlignment="Center" Fill="Red" Data="M 0 0 L 4 4 L 8 0 Z"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Fill" Value="{DynamicResource MouseOverBrush}" TargetName="Rectangle"/>
</Trigger>
<Trigger Property="IsChecked" Value="true">
<Setter Property="Fill" Value="{DynamicResource PressedBrush}" TargetName="Rectangle"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Fill" Value="{DynamicResource DisabledBackgroundBrush}" TargetName="Rectangle"/>
<Setter Property="Stroke" Value="{DynamicResource DisabledBorderBrush}" TargetName="Rectangle"/>
<Setter Property="Foreground" Value="{DynamicResource DisabledForegroundBrush}"/>
<Setter Property="Fill" Value="{DynamicResource DisabledForegroundBrush}" TargetName="Arrow"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
要更改示例中切换按钮的形状或背景，您必须修改ControlsTemplate“ToggleButtonControlTemplate1”。
答案 1 :(得分：0)
使用控件模板。