在WPF中打开ContextMenu时保留DataGrid IsSelectionActive？

Question

我有一个DataGrid风格IsSelectionActive; 然而,一旦ContextMenu打开,网格就会丢失,IsSelectionActive并且用户看起来好像上下文菜单以某种方式进行了选择并且可能使用户感到困惑.

IsSelectionActive上下文菜单打开时有没有办法保留？

<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>

Answer 1

这是我在测试应用程序中使用的整个XAML,以获得您期望的行为:

<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,如果多个具有冲突的触发器Setters同时处于活动状态,则最后一个触发器将获胜.