在WPF中的数据绑定组合框中禁用分隔符选择 [英] Disable separator selection in data bound combo box in WPF

问题描述

我有一个数据绑定的组合框。在这个列表中，我需要一个分隔符。由于这是数据绑定，我做一些非常类似于此信息。我的数据库返回列表，包括一个 - 标记分隔符需要去的地方，而数据挖掘机使它成为一个分隔符。

I have a Combo Box that is databound. In this list, I need a separator. Since this is databound, I do something very similar to this post. My database returns the list, includes a '-' to mark where the separator needs to go, and the datatrigger makes this a separator.

<ComboBox Name="cbAction" Grid.Column="1" Grid.Row="0" Margin="5,2,5,2" DisplayMemberPath="Description" SelectedValuePath="Code" SelectionChanged="cbAction_SelectionChanged">
    <ComboBox.ItemContainerStyle>
        <Style TargetType="{x:Type ComboBoxItem}" BasedOn="{StaticResource {x:Type ComboBoxItem}}">
             <Style.Triggers>
                <DataTrigger Binding="{Binding Code}" Value="-">
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="{x:Type ComboBoxItem}">
                                <Separator HorizontalAlignment="Stretch" IsEnabled="False"/>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </ComboBox.ItemContainerStyle>
</ComboBox>

除了我在这里的问题，将提出另一个问题）。

This works mostly fine, other than the issue I have here, and a minor design problem (which I will put in another question).

使用鼠标时，用户不能选择分隔符，这是正确的。但是如果用户使用向上/向下箭头选择项目，他们可以选择分隔符。这不是默认行为，这将跳过分隔符。

When using the mouse, the user can not select the separator, which is correct. But if the user uses the up/down arrow to select items, they can select the separator. This is not the default behavior, which would skip over the separator.

我如何使这个分隔符的行为类似于如果你的XAML有各种ComboBoxItems和一个Separator项目（跳过分隔符时使用向上和向下键）

How can I make this separator behave similar to the way it would be if your XAML had various ComboBoxItems and a Separator item (skipping over the separator when using the up and down keys)

推荐答案

除了设置Meleak建议的Focusable，设置IsEnabled / p>

Instead of setting "Focusable" as suggested by Meleak, set "IsEnabled" to false instead in the Setter.

<DataTrigger Binding="{Binding Code}" Value="-"> 
    <Setter Property="IsEnabled" Value="False"/>
    <Setter Property="Template"> 
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ComboBoxItem}"> 
                <Separator HorizontalAlignment="Stretch"/> 
            </ControlTemplate> 
        </Setter.Value> 
    </Setter> 
</DataTrigger> 

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