c# - ControlTemplate 中的边框导致 DataGrid 出现奇怪的选择行为

Question

我已经将 Microsoft WPF DataGrid 中的 DataGridRow 重新模板化到下面，我遇到的问题是如果用户单击模板的边框元素，则不会选择行。有没有办法让点击边框导致行选择。

<Grid x:Name="LayoutRoot" Margin="0,0,0,-1">
        <Border x:Name="DGR_Border" BorderBrush="Transparent" Background="Transparent" BorderThickness="1" CornerRadius="5" SnapsToDevicePixels="True">
            <Border x:Name="DGR_InnerBorder" BorderBrush="Transparent" Background="Transparent" BorderThickness="1" CornerRadius="5" SnapsToDevicePixels="True">
                <toolkit:SelectiveScrollingGrid Name="DGR_SelectiveScrollingGrid">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="*"/>
                    </Grid.ColumnDefinitions>

                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="Auto"/>
                    </Grid.RowDefinitions>

                    <toolkit:DataGridCellsPresenter Grid.Column="1" Name="DGR_CellsPresenter" ItemsPanel="{TemplateBinding ItemsPanel}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    <toolkit:DataGridDetailsPresenter Grid.Column="1" Grid.Row="1" Visibility="{TemplateBinding DetailsVisibility}" toolkit:SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding RelativeSource={RelativeSource AncestorType={x:Type Controls:DataGrid}}, Path=AreRowDetailsFrozen, Converter={x:Static Controls:DataGrid.RowDetailsScrollingConverter}, ConverterParameter={x:Static Controls:SelectiveScrollingOrientation.Vertical}}" />
                    <toolkit:DataGridRowHeader Grid.RowSpan="2" toolkit:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type Controls:DataGrid}}, Path=HeadersVisibility, Converter={x:Static Controls:DataGrid.HeadersVisibilityConverter}, ConverterParameter={x:Static Controls:DataGridHeadersVisibility.Row}}"/>
                </toolkit:SelectiveScrollingGrid>
            </Border>
        </Border>
    </Grid>

Answer 1

调用内部方法似乎有些危险。如果实现细节发生变化怎么办？以前的版本有很多变化。

我认为简单地将这样的事件处理程序添加到您的行中可能更为谨慎:

protected void DataGridRow_MouseDown(object sender, MouseButtonEventArgs e)
{
    // GetVisualChild<T> helper method, simple to implement
    DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);

    // try to get the first cell in a row
    DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(0);
    if (cell != null)
    {
        RoutedEventArgs newEventArgs = new RoutedEventArgs(MouseLeftButtonDownEvent);
        //if the DataGridSelectionUnit is set to FullRow this will have the desired effect
        cell.RaiseEvent(newEventArgs);
    }
}

这与单击单元格本身具有相同的效果，并且将仅使用 DataGrid 元素的公共(public)成员。