WPF-DataGrid列绑定到附加属性在上下文菜单上不起作用

Question

I have ToggleButton s and a DataGrid , each row in DataGridColumn has a ColGroup AttachedProperty set to the name of the column group name.

Attached property:

public class DataGridColumnsGroupProperty {
    public static readonly DependencyProperty ColGroupProperty =
        DependencyProperty.RegisterAttached("ColGroup", typeof(object), typeof(DataGridColumnsGroupProperty), new FrameworkPropertyMetadata(null));

    public static void SetColGroup(DependencyObject element, string value) {
        element.SetValue(ColGroupProperty, value);
    }

    public static string GetColGroup(DependencyObject element) {
        return (string)element.GetValue(ColGroupProperty);
    }
}

The ToggleButton s has two jobs, on Check/UnCheck show/collapse all columns with the same group name.

and it has a ContextMenu which shows only the DataGridColumns with the same group name.

I've managed to bind all DataGridColumns to the ToggleButton , but couldn't find a way to Collapse the DataGridColumns with different group names.

How to fill context menu with only the columns with the givin group name inside the Style Trigger?

And how to hid all columns that has the group name when un-check toggle button?

XAML:

<ToggleButton.ContextMenu>
    <ContextMenu x:Name="ContextMenu" ItemsSource="{Binding Columns, ElementName=ElementDataGrid, Converter={StaticResource TestConverter}}">
        <ContextMenu.ItemContainerStyle>
            <Style TargetType="MenuItem">
                <Setter Property="HeaderTemplate" Value="{Binding HeaderTemplate}"/>
                <Setter Property="Header" Value="{Binding Header}"/>
                <Setter Property="StaysOpenOnClick" Value="True" />
                <Setter Property="AutomationProperties.Name" Value="{Binding Header}"/>
                <Setter Property="IsCheckable" Value="True" />
                <Setter Property="IsChecked" Value="{Binding Visibility, Mode=TwoWay, Converter={StaticResource VisibilityToBooleanConverter}}" />
                <Style.Triggers>
                    <Trigger Property="attachedProperties:DataGridColumnsGroupProperty.ColGroup" Value="FirstGroup">
                        <Setter Property="Visibility" Value="Collapsed" />
                    </Trigger>
                </Style.Triggers>
            </Style>
        </ContextMenu.ItemContainerStyle>
    </ContextMenu>
</ToggleButton.ContextMenu>

DataGridColumns:

<DataGridTextColumn x:Name="StoryCol" attachedProperties:DataGridColumnsGroupProperty.ColGroup="FirstGroup" Header="{x:Static p:Resources.Story}" IsReadOnly="True" Binding="{Binding Story}" Visibility="Visible" />
<DataGridTextColumn x:Name="CadIdCol" attachedProperties:DataGridColumnsGroupProperty.ColGroup="SecondGroup" Header="{x:Static p:Resources.CadId}" IsReadOnly="False" Binding="{Binding CadId}" Visibility="Visible" />

Answer 1

Using a DataTrigger should work as far as the binding to the attached property is concerned:

<DataTrigger Binding="{Binding Path=(attachedProperties:DataGridColumnsGroupProperty.ColGroup)}" Value="FirstGroup">
    <Setter Property="Visibility" Value="Collapsed" />
</DataTrigger>