停止突出显示所选项目WPF ComboBox [英] Stop highlighting selected item WPF ComboBox

问题描述

我目前正在开发一个WPF UI，我的窗口上有一个组合框。
所以我想让用户能够从这个组合框中选择一个项目，但是当它被选中
我不想让它以默认的蓝色突出显示。

我假设在XAML中有一些方法可以阻止这个问题，但是到目前为止我还没有找到解决方案。

谢谢。 / p>

PS我没有访问Expression Blend，所以如果有人建议一个解决方案可以在XAML

编辑：只是为了使它更清晰我选择我的意思是一旦你有选择了一个值，并且SelectionChanged事件已触发，并且项目显示在组合框中，并且组合框突出显示为：

解决方案

您需要通过样式设置选择的外观。
$ b

 < Window.Resources> 
< Style TargetType ={x：Type ComboBoxItem}> 
< Setter Property =Control.Template> 
< Setter.Value> 
< ControlTemplate TargetType ={x：Type ComboBoxItem}> 
< Border Background ={TemplateBinding Background}> 
< Grid> 
< Grid.RowDefinitions> 
< RowDefinition /> 
< RowDefinition /> 
< /Grid.RowDefinitions> 
< Border Margin =2Grid.Row =0Background =Azure/> 
< ContentPresenter /> 
< / Grid> 
< / Border> 
< ControlTemplate.Triggers> 
< Trigger Property =IsMouseOverValue =True> 
< Setter Property =BackgroundValue =Green/> 
< / Trigger> 
< /ControlTemplate.Triggers> 
< / ControlTemplate> 
< /Setter.Value> 
< / Setter> 
< / Style> 
< /Window.Resources> 
  

此样式将自动应用于窗口中的任何ComboBoxes：

 < StackPanel> 
< ComboBox> 
< ComboBoxItem> 111< / ComboBoxItem> 
< ComboBoxItem> 222< / ComboBoxItem> 
< ComboBoxItem> 333< / ComboBoxItem> 
< ComboBoxItem> 444< / ComboBoxItem> 
< ComboBoxItem> 555< / ComboBoxItem> 
< / ComboBox> 
< / StackPanel> 
  

您将看到如下：

UPD：为了从选定的项目中删除突出显示，您需要修改实际用于这些用途的系统画笔。只需添加两个额外的样式：

 < SolidColorBrush x：Key ={x：Static SystemColors.HighlightBrushKey}透明/> 
< SolidColorBrush x：Key ={x：Static SystemColors.HighlightTextBrushKey}Color =Black/> 
  

I'm currently working on a WPF UI and I have a combobox on my window. So I want the user to be able to select an item from this combobox but when it is selected I don't want it to be highlighted in the default blue colour.

I assume there is some way to stop this in XAML but I have not been able to find the solution so far.

Thanks.

P.S. I don't have access to Expression Blend so if anyone suggests a solution could it be in XAML

EDIT: Just to make it clearer I by selected I mean once you have selected a value and the SelectionChanged event has fired and the item is displayed in the combobox and the combo box is highlighted like so:

解决方案

You need to set appearance of your selection via styles.

    <Window.Resources>
    <Style TargetType="{x:Type ComboBoxItem}">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ComboBoxItem}">
                    <Border Background="{TemplateBinding Background}">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition />
                                <RowDefinition />
                            </Grid.RowDefinitions>
                            <Border Margin="2" Grid.Row="0" Background="Azure" />
                            <ContentPresenter />
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Background" Value="Green" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

This style will be automatically applied to any ComboBoxes within the window:

<StackPanel>
    <ComboBox>
        <ComboBoxItem>111</ComboBoxItem>
        <ComboBoxItem>222</ComboBoxItem>
        <ComboBoxItem>333</ComboBoxItem>
        <ComboBoxItem>444</ComboBoxItem>
        <ComboBoxItem>555</ComboBoxItem>
    </ComboBox>
</StackPanel>

You will see it as follows:

UPD: In order to remove highlighting from selected item you need to modify system brushes which are actually used for these purposes. Just add two extra styles:

    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Transparent"/>
    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Black"/>  

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