WPF更改组合框的背景颜色

小编典典

WPF更改组合框的背景颜色

在我的WPF应用中，我只想更改组合框的背景颜色。我的意思不是下拉列表，我想要的只是设置背景的任何项目。就像设置按钮的背景一样，当控件显示在屏幕上时，它应具有浅黄色背景。而已。我在网上进行了很多搜索，但是到处都可以找到下拉背景色的解决方案。我尝试将SolidColorBrush和Style.Triggers应用于Combobox的TextBlock，但没有成功。通过添加SolidColorBrush行，我获得了下拉背景集，但这不是我想要的。我的代码是：

<ComboBox ItemsSource="{Binding MtrCm}" SelectedValue="{Binding WellboreDiameter_Unit, Mode=TwoWay}" Grid.Row="1" Height="23" HorizontalAlignment="Right" Margin="0,26,249,0" x:Name="cboWellDiameter" VerticalAlignment="Top" Width="120"   Background="LightYellow"  >
    <ComboBox.Resources>
        <SolidColorBrush x:Key="{x:Static SystemColors.WindowBrushKey}" Color="Yellow" />
        <SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Yellow" />
        <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Yellow" />
        <Style TargetType="TextBlock">
            <Style.Triggers>
                <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=ComboBoxItem}}" Value="True">
                    <Setter Property="Background" Value="Red" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </ComboBox.Resources>
</ComboBox>

谁能帮我设置他正在寻找的所需组件的背景。

谢谢

阅读 338

2020-05-19

共1个答案

小编典典

尝试这个

 <Window.Resources>  //Put this resourse n Window.Resources or UserControl.Resources
   <LinearGradientBrush x:Key="NormalBrush" StartPoint="0,0" EndPoint="0,1">
      <GradientBrush.GradientStops>
         <GradientStopCollection>
            <GradientStop Color="#FFDC3939" Offset="0.0"/>
            <GradientStop Color="#FFE80E0E" Offset="1.0"/>
         </GradientStopCollection>
      </GradientBrush.GradientStops>
   </LinearGradientBrush>

    <SolidColorBrush x:Key="WindowBackgroundBrush" Color="#FFFBE618" />

    <ControlTemplate x:Key="ComboBoxToggleButton" TargetType="ToggleButton">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition Width="20" />
            </Grid.ColumnDefinitions>
            <Border x:Name="Border" Grid.ColumnSpan="2" CornerRadius="2"
  Background="{StaticResource NormalBrush}"
  BorderThickness="1" />
            <Border 
  Grid.Column="0"
  CornerRadius="2,0,0,2" 
  Margin="1" 
  Background="{StaticResource WindowBackgroundBrush}" 
  BorderThickness="0,0,1,0" />
            <Path 
  x:Name="Arrow"
  Grid.Column="1"     
  HorizontalAlignment="Center"
  VerticalAlignment="Center"
  Data="M 0 0 L 4 4 L 8 0 Z"/>
        </Grid>
    </ControlTemplate>

    <ControlTemplate x:Key="ComboBoxTextBox" TargetType="TextBox">
        <Border x:Name="PART_ContentHost" Focusable="False" Background="{TemplateBinding Background}" />
    </ControlTemplate>


<Style x:Key="{x:Type ComboBox}" TargetType="ComboBox">
  <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" 
        Margin="3,3,23,3"
        VerticalAlignment="Center"
        HorizontalAlignment="Left" />
       <TextBox x:Name="PART_EditableTextBox"
         Style="{x:Null}" 
         Template="{StaticResource ComboBoxTextBox}" 
         HorizontalAlignment="Left" 
         VerticalAlignment="Center" 
         Margin="3,3,23,3"
         Focusable="True" 
         Background="Transparent"
         Visibility="Hidden"
         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="{StaticResource WindowBackgroundBrush}"
            BorderThickness="1"/>
           <ScrollViewer Margin="4,6,4,6" SnapsToDevicePixels="True">
            <StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained" />
           </ScrollViewer>
          </Grid>
         </Popup>
        </Grid>
       </ControlTemplate>
      </Setter.Value>
     </Setter>
    <Style.Triggers>
   </Style.Triggers>
  </Style>
 </Window.Resources>
 <Grid>
    <ComboBox HorizontalAlignment="Left" Margin="256,57,0,0" VerticalAlignment="Top" Width="120">
    </ComboBox>

 </Grid>

这是可以更改的完整样式：http : //msdn.microsoft.com/zh-
cn/library/ms752094%28v=VS.85%29.aspx

2020-05-19