保留 DataGrid 在 WPF 中打开上下文菜单时处于“选择活动状态”

本文关键字：选择 活动状态 菜单 上下文 DataGrid WPF 保留 | 更新日期: 2023-09-27 18:35:31

我有一个DataGrid，它有一个IsSelectionActive的样式;但是，一旦ContextMenu打开，网格就会失去IsSelectionActive，在用户看来，好像上下文菜单以某种方式选择了它，可能会使用户感到困惑。

有没有办法在上下文菜单打开时保留IsSelectionActive？

<ControlTemplate.Triggers>
    <MultiTrigger>
        <MultiTrigger.Conditions>
            <!--<Condition Property="Selector.IsFocused" Value="True" />-->
            <Condition Property="IsSelected" Value="True" />
        </MultiTrigger.Conditions>
        <Setter Property="Background" Value="Red" />
    </MultiTrigger>
    <MultiTrigger>
        <MultiTrigger.Conditions>
            <Condition Property="Selector.IsFocused" Value="False" />
            <Condition Property="IsSelected" Value="False" />
        </MultiTrigger.Conditions>
        <Setter Property="Background" Value="Green" />
    </MultiTrigger>
    <MultiTrigger>
        <MultiTrigger.Conditions>
            <Condition Property="Selector.IsFocused" Value="False" />
            <Condition Property="IsSelected" Value="True" />
        </MultiTrigger.Conditions>
        <Setter Property="Background" Value="Blue" />
    </MultiTrigger>

保留 DataGrid 在 WPF 中打开上下文菜单时处于“选择活动状态”

下面是

我在测试应用程序中用于获取所需行为的整个 XAML：

<Window x:Class="DataGridSelectionActive.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:DataGridSelectionActive"
        Title="MainWindow" Height="350" Width="525">
    <!-- People is just an ObservableCollection derived class. -->
    <Window.DataContext>
        <local:People/>
    </Window.DataContext>
    <Window.Resources>
        <ContextMenu x:Key="dataGridContextMenu">
            <MenuItem Header="Some context menu item"/>
        </ContextMenu>
        <Style TargetType="{x:Type DataGridCell}">
            <Style.Triggers>
                <Trigger Property="IsSelected" Value="True">
                    <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
                    <Setter Property="BorderBrush" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                </Trigger>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="True"/>
                        <Condition Binding="{Binding IsKeyboardFocusWithin, RelativeSource={RelativeSource AncestorType=DataGrid}}" Value="False"/>
                    </MultiDataTrigger.Conditions>
                    <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
                    <Setter Property="BorderBrush" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                </MultiDataTrigger>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="True"/>
                        <Condition Binding="{Binding ContextMenu.IsOpen, RelativeSource={RelativeSource AncestorType=DataGrid}}" Value="True"/>
                    </MultiDataTrigger.Conditions>
                    <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
                    <Setter Property="BorderBrush" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                </MultiDataTrigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>
    <DockPanel>
        <!-- Added button for testing keyboard focus. -->
        <Button DockPanel.Dock="Top" Content="Click me"/>
        <DataGrid ItemsSource="{Binding}" ContextMenu="{StaticResource dataGridContextMenu}"/>
    </DockPanel>
</Window>

启用此行为的关键是，如果具有冲突Setters的多个触发器同时处于活动状态，则最后一个触发器获胜。

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